• Oast-house-urine disease E72.1
  • Obermeyer's relapsing fever (European) A68.0
  • Obesity (simple) E66.9
    • constitutional E66.8
    • dietary counseling and surveillance (for) Z71.3
    • drug-induced E66.1
    • due to
      • excess calories E66.0
      • overalimentation E66.0
    • endocrine E66.8
    • endogenous E66.8
    • exogenous E66.0
    • extreme, with alveolar hypoventilation E66.2
    • familial E66.8
    • glandular E66.8
    • hypothyroid Hypothyroidism E03.9
    • hypoventilation syndrome E66.2
    • morbid E66.8
    • nutritional E66.0
    • pituitary E23.6
    • specified NEC E66.8
  • Oblique - see condition
  • Obliteration
    • appendix (lumen) K38.8
    • artery I77.1
    • bile duct (noncalculous) K83.1
    • common duct (noncalculous) K83.1
    • cystic duct Obstruction, cystic duct K82.0
    • eye, anterior chamber H44.4
    • fallopian tube N97.1
    • lymphatic vessel I89.0
      • due to mastectomy I97.2
    • organ or site, congenital NEC Atresia, by site
    • placental blood vessels O43.8
    • ureter N13.5
      • with infection N13.6
    • urethra Stricture, urethra N35.9
    • vein I87.8
  • Observation (for) Z04.9
    • accident NEC Z04.3
      • at work Z04.2
      • transport Z04.1
    • adverse effect of drug Z03.6
    • cardiovascular disease Z03.5
      • myocardial infarction Z03.4
    • development state
      • adolescent Z00.3
      • infant or child Z00.1
      • period of rapid growth in childhood Z00.2
      • puberty Z00.3
    • disease Z03.9
      • cardiovascular NEC Z03.5
        • myocardial infarction Z03.4
      • heart NEC Z03.5
        • myocardial infarction Z03.4
      • mental (suspected) Z03.2
      • nervous system Z03.3
      • specified NEC Z03.8
    • dissocial behavior, without manifest psychiatric disorder Z03.2
    • fire-setting (behavior), without manifest psychiatric disorder Z03.2
    • gang activity or bahavior, without manifest psychiatric disorder Z03.2
    • growth and development state Observation, development state
    • injuries (accidental) NEC Observation, accident Z04.3
      • inflicted NEC Z04.5
        • during alleged rape or seduction Z04.4
    • malignant neoplasm, suspected Z03.1
    • myocardial infarction Z03.4
    • rape or seduction, alleged Z04.4
    • shoplifting (behavior), without manifest psychiatric disorder Z03.2
    • suicide attempt, alleged NEC Z03.8
      • self-poisoning Z03.6
    • suspected (undiagnosed) (unproven)
      • behavioral disorder Z03.2
      • cardiovascular disease NEC Z03.5
        • myocardial infarction Z03.4
      • concussion (cerebral) Z04.5
      • condition NEC Z03.8
      • drug poisoning or adverse effect Z03.6
      • infectious disease not requiring isolation Z03.8
      • malignant neoplasm Z03.1
      • mental disorder Z03.2
      • myocardial infarction Z03.4
      • neoplasm (malignant) Z03.1
        • benign Z03.8
      • nervous system disorder Z03.3
      • suicide attempt, alleged Z03.8
        • self-poisoning Z03.6
      • toxic effects from ingested substance (drug) (poison) Z03.6
      • tuberculosis Z03.0
      • victim of battering (child) (spouse) Z04.5
    • toxic effects from ingested substance (drug) (poison) Z03.6
    • tuberculosis, suspected Z03.0
    • without need for further medical care Z04.9
  • Obsession, obsessional F42.0
    • ideas and mental images F42.0
    • neurosis F42.0
    • rituals F42.1
    • ruminations F42.0
    • state F42.0
      • mixed with compulsive acts F42.2
    • syndrome F42.0
    • thoughts F42.0
  • Obsessive-compulsive neurosis or reaction F42.9
  • Obstetric trauma NEC (complicating delivery O71.9
    • affecting fetus or newborn P03.8
    • following abortion (subsequent episode) O08.6
      • current episode Abortion
  • Obstipation Constipation K59.0
  • Obstruction, obstructed, obstructive
    • airway J98.8
      • with
        • allergic alveolitis J67.9
        • asthma NEC J44.-
        • bronchiectasis J47
        • bronchitis (chronic) J44.8
        • emphysema J43.9
      • chronic J44.9
    • aortic (heart) (valve) Stenosis, aortic I35.0
      • rheumatic I06.0
    • aqueduct of Sylvius G91.1
      • congenital Q03.0
        • with spina bifida Spina bifida, with hydrocephalus Q05.4
    • Arnold-Chiari Q07.0
    • artery Embolism, artery I74.9
      • basilar (complete) (partial) Occlusion, artery, basilar I65.1
      • carotid (complete) (partial) Occlusion, artery, carotid I65.2
      • precerebral Occlusion, artery, precerebral I65.9
      • renal N28.0
      • retinal NEC H34.2
        • central H34.1
        • transient H34.0
      • vertebral (complete) (partial) Occlusion, artery, vertebral I65.0
    • bile duct (common) (hepatic) (noncalculous) K83.1
      • with calculus K80.5
      • congenital (causing jaundice) Q44.3
    • bladder-neck (acquired) N32.0
      • congenital Q64.3
    • bowel Obstruction, intestine K56.6
    • bronchus J98.0
    • canal, ear H61.3
    • cardia NEC K22.2
    • caval veins (inferior) (superior) I87.1
    • cecum Obstruction, intestine K56.6
    • circulatory I99
    • colon Obstruction, intestine K56.6
    • common (bile) duct (noncalculous) K83.1
    • coronary (artery) I25.1
    • cystic duct Obstruction, gallbladder K82.0
      • with calculus Cholelithiasis
    • device, implant or graft Complications, by site and type T85.6
      • arterial graft NEC T82.3
        • coronary (bypass) T82.2
      • catheter NEC T85.6
        • dialysis (renal) T82.4
          • intraperitoneal T85.6
        • infusion NEC T82.5
          • spinal (epidural) (subdural) T85.6
        • urinary (indwelling) T83.0
      • due to infection T85.7
      • gastrointestinal (bile duct) (esophagus) T85.5
      • genital NEC T83.4
        • intrauterine contraceptive device T83.3
      • heart NEC T82.5
        • valve (prosthesis) T82.0
          • graft T82.2
      • joint prosthesis T84.0
      • orthopedic NEC T84.4
      • specified NEC T85.6
      • urinary NEC T83.1
        • graft T83.2
      • vascular NEC T82.5
      • ventricular intracranial shunt T85.0
    • due to foreign body accidentally left in operation wound T81.5
    • duodenum K31.5
    • ejaculatory duct N50.8
    • esophagus K22.2
    • eustachian tube (complete) (partial) H68.1
    • fallopian tube (bilateral) N97.1
    • fecal K56.4
      • with hernia Hernia, by site, with obstruction K46.0
    • foramen of Monro (congenital) Q03.8
      • with spina bifida Spina bifida, with hydrocephalus Q05.4
    • foreign body (causing) Foreign body
    • gallbladder K82.0
      • with calculus or stone Cholelithiasis
      • congenital Q44.1
    • gastric outlet K31.1
    • gastrointestinal Obstruction, intestine K56.6
    • hepatic K76.8
      • duct (noncalculous) K83.1
    • hepatobiliary K83.1
    • ileum Obstruction, intestine K56.6
    • intestine (mechanical) (paroxysmal) (postinfective) K56.6
      • with adhesions (intestinal) (peritoneal) K56.5
      • adynamic Ileus K56.0
      • congenital (small) Q41.9
        • large Q42.9
          • specified part NEC Q42.8
      • distal (syndrome) E84.1
      • gallstone K56.3
      • neurogenic K56.0
        • Hirschsprung's disease or megacolon Q43.1
      • newborn P76.9
        • due to
          • fecaliths P76.8
          • inspissated milk P76.2
          • meconium (plug) P76.0
            • in mucoviscidosis E84.1† P75*
        • specified NEC P76.8
      • postoperative K91.3
      • reflex K56.0
      • volvulus K56.2
    • jejunum Obstruction, intestine K56.6
    • labor Labor, obstructed O66.9
      • affecting fetus or newborn P03.1
      • due to
        • bony pelvis (conditions in O33.-) O65.0
          • pelvic deformity O65.0
        • fetopelvic disproportion NEC O65.4
        • impacted shoulder O66.0
        • malposition (fetus) O64.9
        • maternal pelvic abnormality O65.9
          • specified NEC O65.8
        • persistent occipitoposterior or transverse position O64.0
        • soft tissues and organs of pelvis (conditions in O34.-) O65.5
      • specified NEC O66.8
    • lacrimal (duct) (passages) H04.5
      • congenital Q10.5
    • lacrimonasal duct H04.5
      • congenital Q10.5
    • larynx NEC J38.6
      • congenital Q31.8
    • lung J98.4
      • disease, chronic J44.9
    • lymphatic I89.0
    • meconium plug, newborn P76.0
      • in mucoviscidosis E84.1† P75*
    • mitral Stenosis, mitral
    • nasal J34.8
    • nasolacrimal duct H04.5
      • congenital Q10.5
    • nasopharynx J39.2
    • nose J34.8
    • organ or site, congenital NEC Atresia, by site
    • pancreatic duct K86.8
    • parotid duct K11.8
    • pelviureteral junction N13.5
    • pharynx J39.2
    • portal (circulation) (vein) I81
    • prostate N40
    • pulmonary valve (heart) I37.0
    • pyelonephritis (chronic) N11.1
    • pylorus
      • adult K31.1
      • congenital or infantile Q40.0
    • rectosigmoid Obstruction, intestine K56.6
    • rectum K62.4
    • renal
      • outflow N13.8
      • pelvis, congenital Q62.3
    • repiratory, chronic J44.9
    • retinal (vessels) H34.9
      • specified NEC H34.8
    • salivary duct (any) K11.8
    • sigmoid Obstruction, intestine K56.6
    • sinus (accessory) (nasal) J34.8
    • Stensen's duct K11.8
    • stomach NEC K31.8
      • congenital Q40.2
      • due to pylorospasm K31.3
    • submandibular duct K11.8
    • thoracic duct I89.0
    • thrombotic Thrombosis
    • trachea J39.8
    • tracheostomy airway J95.0
    • tricuspid (valve) Stenosis, tricuspid
    • upper respiratory, congenital Q34.8
    • ureter (functional) NEC N13.5
      • with
        • hydronephrosis N13.1
          • and infection N13.6
        • pyelonephritis (chronic) N11.1
      • congenital Q62.3
      • due to calculus Calculus, ureter N20.1
      • pelvic junction (with) N13.5
        • hydronephrosis N13.0
          • and infection N13.6
        • pyelonephritis (chronic) N11.1
    • urethra NEC N36.8
      • congenital Q64.3
    • urinary (moderate) N13.9
      • organ or tract N13.9
      • prostatic valve N32.0
    • uterus N85.8
    • vagina N89.5
    • valvular Endocarditis
    • vein, venous I87.1
      • caval (inferior) (superior) I87.1
      • thrombotic Thrombosis
    • vena cava (inferior) (superior) I87.1
    • vesical NEC N32.0
    • vesicourethral orifice N32.0
    • vessel NEC I99
  • Obturator - see condition
  • Occlusio pupillae H21.4
  • Occlusion, occluded
    • anus K62.4
      • congenital Q42.3
        • with fistula Q42.2
    • aqueduct of Sylvius G91.1
      • congenital Q03.0
        • with spina bifida Spina bifida, with hydrocephalus Q05.4
    • artery Embolism, artery
      • auditory, internal I65.8
      • basilar (with) I65.1
        • infarction (due to) I63.2
          • embolism I63.1
          • thrombosis I63.0
        • other precerebral artery I65.3
      • brain or cerebral I66.9
        • with infarction (due to) I63.5
          • embolism I63.4
          • thrombosis I63.3
      • carotid (with) I65.2
        • infarction (due to) I63.2
          • embolism I63.1
          • thrombosis I63.0
        • other precerebral artery I65.3
        • bilateral I65.3
      • cerebellar (anterior inferior) (posterior inferior) (superior) I66.3
        • with infarction (due to) I63.5
          • embolism I63.4
          • thrombosis I63.3
      • cerebral I66.9
        • with infarction (due to) I63.5
          • embolism I63.4
          • thrombosis I63.3
        • anterior I66.1
          • with infarction (due to) I63.5
            • embolism I63.4
            • thrombosis I63.3
        • bilateral I66.4
        • middle I66.0
          • with infarction (due to) I63.5
            • embolism I63.4
            • thrombosis I63.3
        • multiple or bilateral I66.4
          • with infarction (due to) I63.5
            • embolism I63.4
            • thrombosis I63.3
        • posterior I66.2
          • with infarction (due to) I63.5
            • embolism I63.4
            • thrombosis I63.3
        • specified NEC I66.8
          • with infarction (due to) I63.5
            • embolism I63.4
            • thrombosis I63.3
      • choroidal (anterior) I66.8
      • communicating posterior I66.8
      • mesenteric (chronic) K55.1
        • acute K55.0
      • perforating I66.8
        • with infarction (due to) I63.5
          • embolism I63.4
          • thrombosis I63.3
      • peripheral I77.9
        • thrombotic or embolic I74.4
      • pontine I66.8
      • precerebral I65.9
        • with infarction (due to) I63.2
          • embolism I63.1
          • thrombosis I63.0
        • multiple or bilateral I65.3
          • with infarction (due to) I63.2
            • embolism I63.1
            • thrombosis I63.0
        • puerperal, postpartum, childbirth O88.2
          • embolic O88.2
        • specified NEC I65.8
          • with infarction (due to) I63.2
            • embolism I63.1
            • thrombosis I63.0
      • renal N28.0
      • retinal (branch) (partial) H34.2
        • central H34.1
        • specified NEC H34.2
        • transient H34.0
      • vertebral I65.0
        • with
          • infarction (due to) I63.2
            • embolism I63.1
            • thrombosis I63.0
          • other precerebral artery I65.3
        • bilateral I65.3
    • basilar artery Occlusion, artery, basilar
    • bile duct (common) (hepatic) (noncalculous) K83.1
    • bowel Obstruction, intestine K56.6
    • carotid (artery) (common) (internal) Occlusion, artery, carotid
    • cerebellar (artery) Occlusion, artery, cerebellar
    • cerebral (artery) Occlusion, artery, cerebral
    • cerebrovascular Occlusion, artery, cerebral I66.9
      • with infarction I63.5
      • diffuse (without infarction) I66.9
    • cervical canal Stricture, cervix N88.2
    • cervix (uteri) Stricture, cervix N88.2
    • colon Obstruction, intestine K56.6
    • coronary (artery) Infarct, myocardium I21.9
      • not resulting in infarction I24.0
    • cystic duct Obstruction, gallbladder K82.0
    • embolic Embolism
    • fallopian tube N97.1
      • congenital Q50.6
    • gallbladder Obstruction, gallbladder K82.0
      • congenital (causing jaundice) Q44.1
    • gingiva, traumatic K06.2
    • hymen N89.6
      • congenital Q52.3
    • intestine Obstruction, intestine K56.6
    • lacrimal passages H04.5
    • lung J98.4
    • lymph or lymphatic channel I89.0
    • mammary duct N64.8
    • mesenteric artery (chronic) K55.1
      • acute K55.0
    • nose J34.8
    • organ or site, congenital NEC Atresia, by site
    • oviduct N97.1
      • congenital Q50.6
    • posterior lingual, of mandibular teeth K07.2
    • precerebral artery Occlusion, artery, precerebral
    • punctum lacrimale H04.5
    • pupil H21.4
    • pylorus, adult Stricture, pylorus K31.1
    • renal artery N28.0
    • retinal
      • artery Occlusion, artery, retinal H34.2
      • vein (central) (incipient) (partial) (tributary) H34.8
      • vessels H34.9
        • specified NEC H34.8
    • thoracic duct I89.0
    • traumatic
      • edentulous (alveolar) ridge K06.2
      • gingiva K06.2
      • periodontal K05.5
    • tubal N97.1
    • ureter (complete) (partial) N13.5
      • congenital Q62.1
    • ureteropelvic junction N13.5
      • congenital Q62.1
    • ureterovesical orifice N13.5
      • congenital Q62.1
    • urethra Stricture, urethra N35.9
      • congenital Q64.3
    • uterus N85.8
    • vagina N89.5
    • vascular NEC I99
    • vein Thrombosis
    • vena cava I82.2
    • ventricle (brain) NEC G91.1
    • vertebral (artery) Occlusion, artery, vertebral
    • vessel (blood) I99
    • vulva N90.5
  • Occult
    • blood in feces R19.5
  • Occupational
    • problems NEC Z56.7
    • therapy Z50.7
  • Ochlophobia F40.0
  • Ochronosis (endogenous) E70.2
    • with chloasma of eyelid E70.2† H03.8*
  • Ocular muscle - see condition
  • Oculogyric crisis or disturbance H51.8
    • psychogenic F45.8
  • Oculomotor syndrome H51.9
  • Oculopathy
    • syphilitic NEC A52.7† H58.8*
      • congenital
        • early A50.0† H58.8*
        • late A50.3† H58.8*
      • early (secondary) A51.4† H58.8*
      • late A52.7† H58.8*
  • Odontalgia K08.8
  • Odontoameloblastoma D16.5
    • upper jaw (bone) D16.4
  • Odontoclasia K02.4
  • Odontodysplasia, regional K00.4
  • Odontogenesis imperfecta K00.5
  • Odontoma D16.5
    • ameloblastic D16.5
      • upper jaw (bone) D16.4
    • complex D16.5
      • upper jaw (bone) D16.4
    • compound D16.5
      • upper jaw (bone) D16.4
    • fibroameloblastic D16.5
      • upper jaw (bone) D16.4
    • upper jaw (bone) D16.4
  • Odontorrhagia K08.8
  • Odontosarcoma, ameloblastic C41.1
    • upper jaw (bone) C41.0
  • Oedema, oedematous Edema
  • Oesophag(o) - see Esophag(o)
  • Oesophagus - see condition, esophagus
  • Oestriasis Myiasis B87.9
  • Ogilvie syndrome K56.0
  • Oguchi's disease H53.6
  • Ohara's disease Tularemia A21.9
  • Old age Senile, senility
  • Olfactory - see condition
  • Oligemia Anemia
  • Oligoastrocytoma, mixed
    • specified site Neoplasm, malignant
    • unspecified site C71.9
  • Oligocythemia D64.9
  • Oligodendroblastoma
    • specified site Neoplasm, malignant
    • unspecified site C71.9
  • Oligodendroglioma
    • anaplastic type
      • specified site Neoplasm, malignant
      • unspecified site C71.9
    • specified site Neoplasm, malignant
    • unspecified site C71.9
  • Oligodontia Anodontia K00.0
  • Oligohidrosis L74.4
  • Oligohydramnios O41.0
    • affecting fetus or newborn P01.2
  • Oligomenorrhea N91.5
    • primary N91.3
    • secondary N91.4
  • Oligophrenia Retardation, mental F79.-
    • phenylpyruvic E70.0
  • Oligospermia N46
  • Oligotrichia Alopecia L65.9
    • congenital Q84.0
  • Oliguria R34
    • following
      • abortion (subsequent episode) O08.4
        • current episode Abortion
      • ectopic or molar pregnancy O08.4
    • postprocedural N99.0
  • Ollier's disease Q78.4
  • Omentitis Peritonitis K65.9
  • Omentum, omental - see condition
  • Omphalitis (congenital) (newborn) (with mild hemorrhage) P38
    • not of newborn L08.9
    • tetanus A33
  • Omphalocele Q79.2
  • Omphalomesenteric duct, persistent Q43.0
  • Omphalorrhagia, newborn P51.9
  • Onanism (excessive) F98.8
  • Onchocerciasis, onchocercosis B73
    • eye NEC B73† H45.1*
    • eyelid B73† H03.0*
  • Oncocytoma Neoplasm, benign
  • Oncovirus, as cause of disease classified elsewhere B97.3
  • Ondine's curse G47.3
  • Oneirophrenia F23.2
  • Onychauxis L60.2
    • congenital Q84.5
  • Onychia (with lymphangitis) L03.0
    • candidal B37.2
    • dermatophytic B35.1
  • Onychitis (with lymphangitis) L03.0
  • Onychocryptosis L60.0
  • Onychodystrophy L60.3
    • congenital Q84.6
  • Onychogryphosis, onychogryposis L60.2
  • Onycholysis L60.1
  • Onychomadesis L60.8
  • Onychomalacia L60.3
  • Onychomycosis B35.1
  • Onychophagia F98.8
  • Onychophosis L60.8
  • Onychoptosis L60.8
  • Onychorrhexis L60.3
    • congenital Q84.6
  • Onychoschizia L60.3
  • Onyxitis (with lymphangitis) L03.0
  • Oophoritis (cystic) (infectional) (interstitial) Salpingo-oophoritis N70.9
    • acute N70.0
    • chronic N70.1
  • Oophorocele N83.4
  • Opacity, opacities
    • cornea H17.9
      • central NEC H17.1
      • congenital Q13.3
      • degenerative H18.4
      • hereditary H18.5
      • inflammatory Keratitis
      • specified NEC H17.8
    • enamel (teeth) (fluoride) (nonfluoride) K00.3
    • lens Cataract H26.9
    • vitreous (humor) NEC H43.3
      • congenital Q14.0
  • Open, opening
    • abnormal, organ or site, congenital Imperfect, closure
    • angle with
      • borderline intraocular pressure H40.0
      • glaucoma (primary) H40.1
    • false Imperfect, closure
    • wound Wound, open
  • Openbite (anterior) (posterior) K07.2
  • Operation R69
    • for delivery, affecting fetus or newborn Delivery, by type, affecting fetus P03.8
    • maternal, unrelated to current delivery, affecting fetus or newborn P00.6
  • Operational fatigue F48.8
  • Operative - see condition
  • Operculum H33.3
  • Ophiasis L63.2
  • Ophthalmia H10.9
    • actinic rays H16.1
    • allergic (acute) H10.1
    • blennorrhagic (gonococcal) (neonatorum) A54.3† H13.1*
    • catarrhal H10.2
    • diphtheritic A36.8† H13.1*
    • Egyptian A71.1† H13.1*
    • electrica H16.1
    • gonococcal (neonatorum) A54.3† H13.1*
    • metastatic H44.0
    • neonatorum, newborn P39.1
      • gonococcal A54.3† H13.1*
    • nodosa H16.2
    • purulent H10.0
    • spring H10.1
    • sympathetic H44.1
  • Ophthalmitis Ophthalmia
  • Ophthalmocele (congenital) Q15.8
  • Ophthalmoneuromyelitis G36.0
  • Ophthalmoplegia Strabismus, paralytic H49.9
    • diabetic (see also E10-E14 with fourth character .3) E14.3† H58.8*
    • external NEC H49.8
    • internal (complete) (total) H52.5
    • internuclear H51.2
    • migraine G43.8
    • Parinaud's H49.8
    • progressive external H49.4
    • supranuclear, progressive G23.1
    • total (external) H49.3
  • Opioid(s)
    • dependence syndrome F11.2
    • harmful use F11.1
    • intoxication (acute) F11.0
    • withdrawal state F11.3
  • Opisthorchiasis (O. felineus) (O. viverrini) B66.0
  • Opitz' disease D73.2
  • Opiumism F11.2
  • Oppenheim's disease G70.2
  • Oppenheim-Urbach disease L92.1
  • Optic nerve - see condition
  • Orbit - see condition
  • Orchioblastoma C62.9
  • Orchitis (nonspecific) (septic) (suppurative) N45.9
    • with abscess N45.0
    • blennorrhagic (acute) (chronic) (gonococcal) A54.2† N51.1*
    • chlamydial A56.1† N51.1*
    • gonococcal (acute) (chronic) A54.2† N51.1*
    • mumps B26.0† N51.1*
    • syphilitic A52.7† N51.1*
    • tuberculous A18.1† N51.1*
  • Orf (virus disease) B08.0
  • Organ of Morgagni (persistence of)
    • female Q50.5
    • male (epididymal) Q55.4
      • testicular Q55.2
  • Organic - see condition
  • Orientation, sexual, egodystonic (bisexual) (heterosexual) (homosexual) (prepubertal) F66.1
  • Orifice - see condition
  • Ormond's disease (with ureteral obstruction) N13.5
    • with infection N13.6
  • Ornithine metabolism disorder E72.4
  • Ornithinemia (type I) (type II) E72.4
  • Ornithosis A70
    • with pneumonia A70† J17.8*
  • Orotic aciduria (congenital) (hereditary) (pyrimidine deficiency) E79.8
    • anemia D53.0
  • Orthodontics
    • adjustment Z46.4
    • fitting Z46.4
  • Orthopnea R06.0
  • Orthoptic training Z50.6
  • Os, uterus - see condition
  • Osgood-Schlatter disease or osteochondrosis M92.5
  • Osler-Rendu disease I78.0
  • Osler's nodes I33.0
  • Osmidrosis L75.0
  • Osseous - see condition
  • Ossification
    • artery Arteriosclerosis
    • auricle (ear) H61.1
    • bronchial J98.0
    • cardiac Degeneration, myocardial I51.5
    • cartilage (senile) M94.8
    • coronary (artery) I25.1
    • diaphragm J98.6
    • falx cerebri G96.1
    • fontanel, premature Q75.0
    • heart Degeneration, myocardial I51.5
      • valve Endocarditis
    • larynx J38.7
    • ligament M67.8
      • posterior longitudinal M48.8
    • meninges (cerebral) (spinal) G96.1
    • multiple, eccentric centers M89.2
    • muscle M61.9
      • due to burns M61.3
      • paralytic M61.2
      • specified NEC M61.5
    • myocardium, myocardial Degeneration, myocardial I51.5
    • penis N48.8
    • periarticular M25.8
    • pinna H61.1
    • rider's bone M61.5
    • sclera H15.8
    • subperiosteal, post-traumatic M89.8
    • tendon M67.8
    • trachea J39.8
    • tympanic membrane H73.8
    • vitreous (humor) H43.2
  • Osteitis Osteomyelitis M86.9
    • alveolar K10.3
    • condensans M85.3
    • deformans M88.9
      • in (due to)
        • malignant neoplasm of bone C41.9† M90.6*
        • neoplastic disease NEC Neoplasm D48.9† M90.6*
      • skull M88.0
      • specified NEC M88.8
    • due to yaws A66.6† M90.2*
    • fibrosa NEC M85.6
      • circumscripta M85.0
      • cystica (generalisata) E21.0
      • disseminata Q78.1
      • osteoplastica E21.0
    • fragilitans Q78.0
    • Garré's (sclerosing) M86.8
    • jaw (acute) (chronic) (lower) (suppurative) (upper) K10.2
    • parathyroid E21.0
    • petrous bone (acute) (chronic) H70.2
    • sclerotic, nonsuppurative M86.8
    • tuberculosa A18.0† M90.0*
      • cystica D86.8
      • multiplex cystoides D86.8
  • Osteoarthritis Arthrosis M19.9
    • generalized M15.9
    • interphalangeal
      • distal (Heberden) M15.1
      • proximal (Bouchard) M15.2
  • Osteoarthropathy Osteoarthrosis M19.9
    • hypertrophic M19.9
      • pulmonary M89.4
      • specified NEC M89.4
    • secondary hypertrophic M89.4
  • Osteoarthrosis (degenerative) (hypertrophic) Arthrosis M19.9
    • deformans alkaptonurica E70.2† M36.8*
    • erosive M15.4
    • generalized M15.9
      • primary M15.0
    • joint NEC M19.9
      • primary M19.0
      • secondary NEC M19.2
    • localized M19.9
    • polyarticular M15.9
    • spine Spondylosis M47.9
  • Osteoblastoma Neoplasm, bone, benign
    • aggressive Neoplasm, bone, uncertain behavior
  • Osteochondritis Osteochondrosis M93.9
    • Brailsford's M92.1
    • dissecans M93.2
    • juvenile M92.9
      • patellar M92.4
    • syphilitic (congenital) (early) A50.0† M90.2*
  • Osteochondrodysplasia Q78.9
    • with defects of growth of tubular bones and spine Q77.9
      • specified NEC Q77.8
    • specified NEC Q78.8
  • Osteochondrodystrophy E78.9
    • deformans E76.2
    • familial E76.2
  • Osteochondroma Neoplasm, bone, benign
  • Osteochondromatosis D48.0
    • syndrome Q78.4
  • Osteochondromyxosarcoma Neoplasm, bone, malignant
  • Osteochondropathy M93.9
    • specified NEC M93.8
    • syphilitic, congenital
      • early A50.0† M90.2*
      • late A50.5† M90.2*
  • Osteochondrosarcoma Neoplasm, bone, malignant
  • Osteochondrosis M93.9
    • acetabulum (juvenile) M91.0
    • adult NEC M93.8
      • carpal lunate (Kienböck's) M93.1
    • astragalus (juvenile) M92.6
    • Blount's M92.5
    • Buchanan's M91.0
    • Burns' M92.1
    • calcaneus (juvenile) M92.6
    • capitular epiphysis (femur) (juvenile) M91.1
    • carpal (juvenile) (lunate) (scaphoid) M92.2
    • coxae juvenilis M91.1
    • deformans juvenilis, coxae M91.1
    • Diaz's M92.6
    • dissecans (knee) (shoulder) M93.2
    • femoral capital epiphysis (juvenile) M91.1
    • femur (head), juvenile M91.1
    • fibula (juvenile) M92.5
    • foot NEC (juvenile) M92.8
    • Freiberg's M92.7
    • Haas' (juvenile) M92.0
    • Haglund's M92.6
    • hip (juvenile) M91.1
    • humerus (capitulum) (head) (juvenile) M92.0
    • ilium, iliac crest (juvenile) M91.0
    • ischiopubic synchondrosis M91.0
    • Iselin's M92.7
    • juvenile, juvenilis M92.9
      • after reduction of congenital dislocation of hip M91.8
      • arm M92.3
      • capitular epiphysis (femur) M91.1
      • clavicle, sternal epiphysis M92.3
      • coxae M91.1
      • deformans M92.9
      • foot NEC M92.8
      • hand M92.2
      • head of femur M91.1
      • hip and pelvis M91.9
        • specified NEC M91.8
      • limb
        • lower NEC M92.8
        • upper NEC M92.3
      • medial cuneiform bone M92.6
      • specified site NEC M92.8
      • spine M42.0
      • vertebra (body) (Calvé's) M42.0
        • epiphyseal plates (Scheuermann's) M42.0
    • Kienböck's (juvenile) M92.2
      • of adults M93.1
    • Köhler's
      • patellar M92.4
      • tarsal navicular M92.6
    • Legg-Perthes (-Calvé) (-Waldenström) M91.1
    • limb
      • lower NEC (juvenile) M92.8
      • upper NEC (juvenile) M92.3
    • lunate bone (carpal) (juvenile) M92.2
      • adult M93.1
    • Mauclaire's M92.2
    • metacarpal (head) (juvenile) M92.2
    • metatarsus (fifth) (head) (juvenile) (second) M92.7
    • navicular (juvenile) M92.6
    • os
      • calcis (juvenile) M92.6
      • tibiale externum (juvenile) M92.6
    • Osgood-Schlatter M92.5
    • Panner's M92.0
    • patellar center (juvenile) (primary) (secondary) M92.4
    • pelvis (juvenile) M91.0
    • Pierson's M91.0
    • radius (head) (juvenile) M92.1
    • Scheuermann's M42.0
    • Sever's M92.6
    • Sinding-Larsen M92.4
    • spine M42.9
      • adult M42.1
      • juvenile M42.0
    • symphysis pubis (juvenile) M91.0
    • talus (juvenile) M92.6
    • tarsus (navicular) (juvenile) M92.6
    • tibia (proximal) (tubercle) (juvenile) M92.5
    • tuberculous Tuberculosis, bone
    • ulna (lower) (juvenile) M92.1
    • van Neck's M91.0
    • vertebral Osteochondrosis, spine M42.9
  • Osteoclastoma D48.0
    • malignant Neoplasm, bone, malignant
  • Osteodynia M89.8
  • Osteodystrophy Q78.9
    • azotemic N25.0
    • congenital Q78.9
    • parathyroid, secondary E21.1
    • renal N25.0
  • Osteofibroma Neoplasm, bone, benign
  • Osteofibrosarcoma Neoplasm, bone, malignant
  • Osteogenesis imperfecta Q78.0
  • Osteogenic - see condition
  • Osteolysis M89.5
  • Osteoma Neoplasm, bone, benign
    • osteoid
      • giant D16.9
  • Osteomalacia M83.9
    • adult M83.9
      • drug-induced NEC M83.5
      • due to
        • malabsorption (postsurgical) M83.2
        • malnutrition M83.3
      • specified NEC M83.8
    • aluminum-induced M83.4
    • infantile Rickets E55.0
    • juvenile Rickets E55.0
    • pelvis M83.8
    • puerperal M83.0
    • senile M83.1
    • vitamin-D-resistant E83.3† M90.8*
  • Osteomyelitis (infective) (septic) (suppurative) M86.9
    • acute M86.1
      • hematogenous M86.0
    • chronic (or old) M86.6
      • with draining sinus M86.4
      • hematogenous NEC M86.5
      • multifocal M86.3
    • echinococcal B67.2† M90.2*
    • Garré's M86.8
    • gonococcal A54.4† M90.2*
    • jaw (acute) (chronic) (lower) (neonatal) (suppurative) (upper) K10.2
    • nonsuppurating M86.8
    • orbit H05.0
    • petrous bone H70.2
    • Salmonella (arizonae) (cholerae-suis) (enteritidis) (typhimurium) A02.2† M90.2*
    • sclerosing, nonsuppurative M86.8
    • specified NEC M86.8
    • subacute M86.2
    • syphilitic A52.7† M90.2*
      • congenital (early) A50.0† M90.2*
    • tuberculous Tuberculosis, bone
    • typhoid A01.0† M90.2*
    • vertebra M46.2
  • Osteomyelofibrosis D47.4
  • Osteomyelosclerosis D47.4
  • Osteonecrosis M87.9
    • in (due to)
      • caisson disease T70.3† M90.3*
      • drugs M87.1
        • jaw K10.2
      • hemoglobinopathy NEC D58.2† M90.4*
      • trauma (previous) M87.2
    • jaw (drug-induced) (radiation-induced) K10.2
    • secondary NEC M87.3
    • specified NEC M87.8
  • Osteopathia condensans disseminata Q78.8
  • Osteopathy
    • after poliomyelitis M89.6
    • in (due to) renal osteodystrophy N25.0† M90.8*
  • Osteoperiostitis Osteomyelitis M86.8
  • Osteopetrosis (familial) Q78.2
  • Osteophyte M25.7
    • facet joint Spondylosis
  • Osteopoikilosis Q78.8
  • Osteoporosis M81.9
    • with pathological fracture M80.9
    • disuse M81.2
      • with pathological fracture M80.2
    • drug-induced M81.4
      • with pathological fracture M80.4
    • idiopathic M81.5
      • with pathological fracture M80.5
    • in (due to)
      • endocrine disease NEC E34.9† M82.1*
      • multiple myelomatosis C90.0† M82.0*
    • localized (Lequesne) M81.6
    • postmenopausal M81.0
      • with pathological fracture M80.0
    • postoophorectomy M81.1
      • with pathological fracture M80.1
    • postsurgical malabsorption M81.3
      • with pathological fracture M80.3
    • post-traumatic M81.8
      • with pathological fracture M80.8
    • senile M81.8
      • with pathological fracture M80.8
    • specified NEC M81.8
      • with pathological fracture M80.8
  • Osteopsathyrosis (idiopathica) Q78.0
  • Osteoradionecrosis, jaw (acute) (chronic) (lower) (suppurative) (upper) K10.2
  • Osteosarcoma Neoplasm, bone, malignant
    • chondroblastic C41.9
    • fibroblastic C41.9
    • in Paget's disease of bone C41.9
    • juxtacortical C41.9
    • parosteal C41.9
    • small cell C41.9
    • telangiectatic C41.9
  • Osteosclerosis Q78.2
    • acquired M85.8
    • congenita Q77.4
    • fragilitas (generalisata) Q78.2
    • myelofibrosis D47.4
  • Osteosclerotic anemia D64.8
  • Osteosis cutis L94.2
  • Osterreicher-Turner syndrome Q87.2
  • Ostium
    • atrioventriculare commune Q21.2
    • primum (arteriosum) (defect) (persistent) Q21.2
    • secundum (arteriosum) (defect) (patent) (persistent) Q21.1
  • Ostrum-Furst syndrome Q75.8
  • Otalgia H92.0
  • Othematoma, pinna (nontraumatic) H61.1
  • Otitis H66.9
    • adhesive H74.1
    • externa H60.9
      • acute H60.5
        • actinic H60.5
        • chemical H60.5
        • contact H60.5
        • eczematoid H60.5
        • reactive H60.5
      • chronic H60.8
      • diffuse H60.3
      • hemorrhagic H60.3
      • in (due to)
        • aspergillosis B44.8† H62.2*
        • candidiasis B37.2† H62.2*
        • erysipelas A46† H62.0*
        • herpes (simplex) virus infection B00.1† H62.1*
          • zoster B02.8† H62.1*
        • impetigo L01.0† H62.4*
        • infectious disease NEC B99† H62.3*
        • mycosis NEC B36.9† H62.2*
        • parasitic disease NEC B89† H62.3*
        • viral disease NEC B34.9† H62.1*
        • zoster B02.8† H62.1*
      • infective NEC H60.3
      • malignant H60.2
      • mycotic B36.9† H62.2*
      • necrotizing H60.2
      • Pseudomonas aeruginosa H60.2
      • specified NEC H60.8
    • interna H83.0
    • media H66.9
      • with effusion (nonpurulent) H65.9
      • acute or subacute H66.9
        • with effusion H65.1
        • allergic H65.1
        • exudative H65.1
        • mucoid H65.1
        • necrotizing (in) H66.0
          • measles B05.3† H67.1*
          • scarlet fever A38† H67.0*
        • nonsuppurative NEC H65.1
        • purulent H66.0
        • sanguinous H65.1
        • secretory H65.0
        • seromucinous H65.1
        • serous H65.0
        • suppurative H66.0
      • allergic H65.9
      • catarrhal H65.9
      • chronic H66.9
        • with effusion (nonpurulent) H65.4
        • allergic H65.4
        • catarrhal H65.2
        • exudative H65.4
        • mucinous H65.3
        • mucoid H65.3
        • nonsuppurative NEC H65.4
        • purulent H66.3
        • secretory H65.3
        • seromucinous H65.4
        • serous H65.2
        • suppurative H66.3
          • atticoantral H66.2
          • benign H66.1
          • specified NEC H66.3
          • tubotympanic H66.1
        • transudative H65.3
      • exudative H65.9
      • in (due to)
        • influenza (specific virus not identified) J11.8† H67.1*
          • seasonal influenza virus identified J10.8† H67.1*
          • zoonotic or pandemic influenza virus identified J09† H67.1*
        • measles B05.3† H67.1*
        • scarlet fever A38† H67.0*
        • tuberculosis A18.6† H67.0*
        • viral disease NEC B34.9† H67.1*
      • mucoid H65.9
      • nonsuppurative H65.9
      • postmeasles B05.3† H67.1*
      • purulent H66.4
      • secretory H65.9
      • seromucinous H65.9
      • serous H65.9
      • suppurative H66.4
      • transudative H65.9
      • tuberculous A18.6† H67.0*
  • Otocephaly Q18.2
  • Otolith syndrome H81.8
  • Otomycosis (diffuse) (in) B36.9† H62.2*
    • aspergillosis B44.8† H62.2*
    • candidiasis B37.8† H62.2*
    • moniliasis B37.8† H62.2*
  • Otorrhagia (nontraumatic) H92.2
    • traumatic Injury, by type
  • Otorrhea H92.1
    • cerebrospinal G96.0
  • Otosclerosis H80.9
    • cochlear H80.2
    • involving
      • otic capsule H80.2
      • oval window
        • nonobliterative H80.0
        • obliterative H80.1
      • round window H80.2
    • nonobliterative H80.0
    • obliterative H80.1
    • specified NEC H80.8
  • Otospongiosis Otosclerosis H80.9
  • Otto's disease or pelvis M24.7
  • Outcome of delivery Z37.9
    • multiple (births) Z37.9
      • all liveborn Z37.5
      • all stillborn Z37.7
      • some liveborn Z37.6
    • single Z37.9
      • liveborn Z37.0
      • stillborn Z37.1
    • twins Z37.9
      • both liveborn Z37.2
      • both stillborn Z37.4
      • one liveborn, one stillborn Z37.3
  • Outlet - see also condition
    • double, right ventricle (congenital) Q20.1
  • Outstanding ears (bilateral) Q17.5
  • Ovalocytosis (congenital) (hereditary) Elliptocytosis D58.1
  • Ovariocele N83.4
  • Ovaritis (cystic) Salpingo-oophoritis N70.9
  • Ovary, ovarian - see also condition
    • resistant syndrome E28.3
  • Overactive
    • adrenal cortex NEC E27.0
    • bladder N32.8
    • disorder, associated with mental retardation and stereotyped movements F84.4
    • hypothalmus E23.3
    • thyroid Hyperthyroidism E05.9
  • Overactivity R46.3
  • Overbite (deep) (excessive) (horizontal) (vertical) K07.2
  • Overbreathing Hyperventilation R06.4
  • Overdevelopment Hypertrophy
  • Overdistension Distension
  • Overdose, overdosage (drug) T50.9
    • specified drug or substance - see Table of drugs and chemicals
  • Overeating R63.2
    • nonorganic origin F50.4
    • psychogenic F50.4
  • Overexertion (effects) (exhaustion) T73.3
  • Overexposure (effects) T73.9
    • exhaustion T73.2
  • Overfeeding R63.2
    • newborn P92.4
  • Overgrowth, bone NEC M89.3
  • Overheated (places) Heat
  • Overjet K07.2
  • Overlapping toe (acquired) M20.5
    • congenital (fifth toe) Q66.8
  • Overload
    • fluid E87.7
    • potassium (K) E87.5
    • sodium (Na) E87.0
  • Overnutrition Hyperalimentation R63.2
  • Overproduction Hypersecretion
    • catecholamine E27.5
    • growth hormone E22.0
  • Overprotection, child by parent Z62.1
  • Overriding
    • aorta Q25.4
    • finger (acquired) M20.0
      • congenital Q68.1
    • toe (acquired) M20.5
      • congenital Q66.8
  • Oversize fetus P08.1
    • affecting management of pregnancy O36.6
    • causing disproportion O33.5
      • with obstructed labor O66.2
      • affecting fetus or newborn P03.1
    • exceptionally large (more than 4500 g) P08.0
  • Overweight Obesity E66.9
  • Oviduct - see condition
  • Ovotestis Q56.0
  • Ovulation (cycle)
    • failure or lack of N97.0
    • pain N94.0
  • Ovum - see condition
  • Owren's disease D68.2
  • Ox heart Hypertrophy, cardiac
  • Oxalosis E74.8
  • Oxaluria E74.8
  • Oxycephaly Q75.0
    • syphilitic, congenital A50.0
  • Oxyuriasis B80
  • Oxyuris vermicularis (infection) (infestation) B80
  • Ozena J31.0