Chapter XI
Diseases of the digestive system
(K00-K93)

Rules Conventions GCS DChS.XI.1

Diseases of oesophagus, stomach and duodenum
(K20-K31)

Excl.:
hiatus hernia ( K44.-)
Modifiers

The following fourth-character subdivisions are for use with categories K25-K28:

Code Title
.0
Acute with haemorrhage
.1
Acute with perforation
.2
Acute with both haemorrhage and perforation
.3
Acute without haemorrhage or perforation
.4
Chronic or unspecified with haemorrhage
.5
Chronic or unspecified with perforation
.6
Chronic or unspecified with both haemorrhage and perforation
.7
Chronic without haemorrhage or perforation
.9
Unspecified as acute or chronic, without haemorrhage or perforation

K20 Oesophagitis

Incl.:
Abscess of oesophagus
Oesophagitis:
  • NOS
  • chemical
  • peptic
Coding-Hint
Use additional external cause code (Chapter XX), if desired, to identify cause.
Excl.:
erosion of oesophagus ( K22.1)
reflux oesophagitis ( K21.0)
with gastro-oesophageal reflux disease ( K21.0)

K21 Gastro-oesophageal reflux disease

K21.0 Gastro-oesophageal reflux disease with oesophagitis
Incl.:
Reflux oesophagitis
K21.9 Gastro-oesophageal reflux disease without oesophagitis
Incl.:
Oesophageal reflux NOS

K22 Other diseases of oesophagus

Excl.:
oesophageal varices ( I85.-)
K22.0 Achalasia of cardia
Incl.:
Achalasia NOS
Cardiospasm
Excl.:
congenital cardiospasm ( Q39.5)
K22.1 Ulcer of oesophagus
Incl.:
Erosion of oesophagus
Ulcer of oesophagus:
  • NOS
  • due to ingestion of:
    • —  chemicals
    • —  drugs and medicaments
  • fungal
  • peptic
Ulcerative oesophagitis
Coding-Hint
Use additional external cause code (Chapter XX), if desired, to identify cause.
K22.2 Oesophageal obstruction
DCS.XI.1
Incl.:
  • Compression
  • Constriction
  • Stenosis
  • Stricture
  • of oesophagus
Excl.:
congenital stenosis or stricture of oesophagus ( Q39.3)
K22.3 Perforation of oesophagus
Incl.:
Rupture of oesophagus
Excl.:
traumatic perforation of (thoracic) oesophagus ( S27.8)
K22.4 Dyskinesia of oesophagus
Incl.:
Corkscrew oesophagus
Diffuse oesophageal spasm
Spasm of oesophagus
Excl.:
cardiospasm ( K22.0)
K22.5 Diverticulum of oesophagus, acquired
Incl.:
Oesophageal pouch, acquired
Excl.:
diverticulum of oesophagus (congenital) ( Q39.6)
K22.6 Gastro-oesophageal laceration-haemorrhage syndrome
Incl.:
Mallory-Weiss syndrome
K22.7 Barrett oesophagus
DCS.XI.2
Incl.:
Barrett:
  • disease
  • syndrome
Excl.:
Barrett ulcer ( K22.1)
K22.8 Other specified diseases of oesophagus
Incl.:
Haemorrhage of oesophagus NOS
K22.9 Disease of oesophagus, unspecified

K23* Disorders of oesophagus in diseases classified elsewhere

K23.0* Tuberculous oesophagitis (A18.8†)
K23.1* Megaoesophagus in Chagas disease (B57.3†)
K23.8* Disorders of oesophagus in other diseases classified elsewhere

K25 Gastric ulcer
DCS.XI.3

Modifier-Hint
[See at the beginning of this block for subdivisions]
Incl.:
erosion (acute) of stomach
ulcer (peptic):
  • pylorus
  • stomach
Coding-Hint
Use additional external cause code (Chapter XX), if desired, to identify drug, if drug-induced.
Excl.:
acute haemorrhagic erosive gastritis ( K29.0)
peptic ulcer NOS ( K27.-)

K26 Duodenal ulcer
DCS.XI.3

Modifier-Hint
[See at the beginning of this block for subdivisions]
Incl.:
erosion (acute) of duodenum
ulcer (peptic):
  • duodenal
  • postpyloric
Coding-Hint
Use additional external cause code (Chapter XX), if desired, to identify drug, if drug-induced.
Excl.:
peptic ulcer NOS ( K27.-)

K27 Peptic ulcer, site unspecified
DCS.XI.3

Modifier-Hint
[See at the beginning of this block for subdivisions]
Incl.:
gastroduodenal ulcer NOS
peptic ulcer NOS
Excl.:
peptic ulcer of newborn ( P78.8)

K28 Gastrojejunal ulcer
DCS.XI.3

Modifier-Hint
[See at the beginning of this block for subdivisions]
Incl.:
ulcer (peptic) or erosion:
  • anastomotic
  • gastrocolic
  • gastrointestinal
  • gastrojejunal
  • jejunal
  • marginal
  • stomal
Excl.:
primary ulcer of small intestine ( K63.3)

K29 Gastritis and duodenitis
DCS.XI.4

Excl.:
eosinophilic gastritis or gastroenteritis ( K52.8)
Zollinger-Ellison syndrome ( E16.4)
K29.0 Acute haemorrhagic gastritis
Incl.:
Acute (erosive) gastritis with haemorrhage
Excl.:
erosion (acute) of stomach ( K25.-)
K29.1 Other acute gastritis
K29.2 Alcoholic gastritis
K29.3 Chronic superficial gastritis
K29.4 Chronic atrophic gastritis
Incl.:
Gastric atrophy
K29.5 Chronic gastritis, unspecified
Incl.:
Chronic gastritis:
  • antral
  • fundal
K29.6 Other gastritis
Incl.:
Giant hypertrophic gastritis
Granulomatous gastritis
Ménétrier disease
K29.7 Gastritis, unspecified
K29.8 Duodenitis
K29.9 Gastroduodenitis, unspecified

K30 Functional dyspepsia

Incl.:
Indigestion
Excl.:
dyspepsia:
heartburn ( R12)

K31 Other diseases of stomach and duodenum

Incl.:
functional disorders of stomach
Excl.:
diverticulum of duodenum ( K57.0-K57.1)
gastrointestinal haemorrhage ( K92.0-K92.2)
K31.0 Acute dilatation of stomach
Incl.:
Acute distension of stomach
K31.1 Adult hypertrophic pyloric stenosis
Incl.:
Pyloric stenosis NOS
Excl.:
congenital or infantile pyloric stenosis ( Q40.0)
K31.2 Hourglass stricture and stenosis of stomach
Excl.:
congenital hourglass stomach ( Q40.2)
hourglass contraction of stomach ( K31.8)
K31.3 Pylorospasm, not elsewhere classified
Excl.:
pylorospasm:
K31.4 Gastric diverticulum
Excl.:
congenital diverticulum of stomach ( Q40.2)
K31.5 Obstruction of duodenum
Incl.:
  • Constriction
  • Stenosis
  • Stricture
  • of duodenum
Duodenal ileus (chronic)
Excl.:
congenital stenosis of duodenum ( Q41.0)
K31.6 Fistula of stomach and duodenum
Incl.:
Gastrocolic fistula
Gastrojejunocolic fistula
K31.7 Polyp of stomach and duodenum
Excl.:
adenomatous polyp of stomach ( D13.1)
K31.8 Other specified diseases of stomach and duodenum
Incl.:
Achlorhydria
Gastroptosis
Hourglass contraction of stomach
K31.9 Disease of stomach and duodenum, unspecified