K20-K31 ICD-10-CA block: Diseases of oesophagus, stomach and duodenum
K20-K31 isn’t a code on its own. Choose one of the 85 codes beneath it, the one the documentation supports.
Official description
K20-K31Diseases of oesophagus, stomach and duodenum (K20-K31)
ICD-10-CA · Canada
Codes in K20-K31
K20-K31 isn’t a code on its own. Open the group that matches what the note documents.
K20Oesophagitis (3 codes)K21Gastro-oesophageal reflux disease (2 codes)K22Other diseases of oesophagus (18 codes)K23Disorders of oesophagus in diseases classified elsewhere (3 codes)K25Gastric ulcer (9 codes)K26Duodenal ulcer (9 codes)K27Peptic ulcer, site unspecified (9 codes)K28Gastrojejunal ulcer (9 codes)K29Gastritis and duodenitis (10 codes)K30Functional dyspepsiaK31Other diseases of stomach and duodenum (12 codes)Notes for K20-K31
As CIHI prints them, with any note K20-K31 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Hiatus hernia (K44.-)
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)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)From Chapter 11: Diseases of the digestive system (K00-K93)
Where K20-K31 sits
- 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
- 2Block K20-K31Diseases of oesophagus, stomach and duodenum
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is K20-K31 a valid ICD-10-CA code?
No. K20-K31 (Diseases of oesophagus, stomach and duodenum) is a block heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 85 codes; record the one the documentation supports.
Where is K20-K31 in ICD-10-CA?
K20-K31 sits under Chapter 11: Diseases of the digestive system (K00-K93).
What coding notes apply to K20-K31?
ICD-10-CA lists Excludes notes for K20-K31, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside K20-K31
K00-K14Diseases of oral cavity, salivary glands and jawsK35-K38Diseases of appendixK40-K46HerniaK50-K52Noninfective enteritis and colitisK55-K64Other diseases of intestinesK65-K67Diseases of peritoneumK70-K77Diseases of liverK80-K87Disorders of gallbladder, biliary tract and pancreasK90-K93Other diseases of the digestive system