Chapter XIII
Diseases of the musculoskeletal system and connective tissue
(M00-M99)

Rules Conventions GCS DChS.XIII.1 DChS.XIII.2
Excl.:
certain conditions originating in the perinatal period ( P00-P96)
certain disorders of the temporomandibular joint ( K07.6)
certain infectious and parasitic diseases ( A00-B99)
compartment syndrome ( T79.6)
complications of pregnancy, childbirth and the puerperium ( O00-O99)
congenital malformations, deformations and chromosomal abnormalities ( Q00-Q99)
endocrine, nutritional and metabolic diseases ( E00-E90)
injury, poisoning and certain other consequences of external causes ( S00-T98)
neoplasms ( C00-D48)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified ( R00-R99)
This chapter contains the following blocks:
Asterisk categories for this chapter are provided as follows:
  • M01* Direct infections of joint in infectious and parasitic diseases classified elsewhere
  • M03* Postinfective and reactive arthropathies in diseases classified elsewhere
  • M07* Psoriatic and enteropathic arthropathies
  • M09* Juvenile arthritis in diseases classified elsewhere
  • M14* Arthropathies in other diseases classified elsewhere
  • M36* Systemic disorders of connective tissue in diseases classified elsewhere
  • M49* Spondylopathies in diseases classified elsewhere
  • M63* Disorders of muscle in diseases classified elsewhere
  • M68* Disorders of synovium and tendon in diseases classified elsewhere
  • M73* Soft tissue disorders in diseases classified elsewhere
  • M82* Osteoporosis in diseases classified elsewhere
  • M90* Osteopathies in diseases classified elsewhere
Modifiers

Site of musculoskeletal involvement

The following subclassification to indicate the site of involvement is provided for optional use with appropriate categories in Chapter XIII. As local extensions or specialty adaptations may vary in the number of characters used, it is suggested that the supplementary site subclassification be placed in an identifiably separate position (e.g. in an additional box). Different sub-classifications for use with derangement of knee, dorsopathies, and biomechanical lesions not elsewhere classified are given at M23, before M40 and at M99 respectively.

Code Title
0
Multiple sites
1
Shoulder region
Incl.:
clavicle
scapula
  • acromioclavicular
  • glenohumeral
  • sternoclavicular
  • joints
2
Upper arm
Incl.:
humerus
elbow joint
3
Forearm
Incl.:
radius
ulna
wrist joint
4
Hand
Incl.:
carpus
fingers
metacarpus
joints between these bones
5
Pelvic region and thigh
Incl.:
buttock
femur
pelvis
hip (joint)
sacroiliac joint
6
Lower leg
Incl.:
fibula
knee joint
tibia
7
Ankle and foot
Incl.:
metatarsus
tarsus
toes
ankle joint
other joints in foot
8
Other
Incl.:
head
neck
ribs
skull
trunk
vertebral column
9
Site unspecified