ICD-10-CM 2027
ICD-10 code for stomach acquired diverticulum
From the official ICD-10-CM alphabetic index entry “Diverticulum, diverticula (multiple) › stomach (acquired)”. Page updated September 29, 2026.
About coding stomach acquired diverticulum
The ICD-10-CM code for stomach acquired diverticulum is K31.4 (Gastric diverticulum). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on K31.4.
Within K31 (other diseases of stomach and duodenum), K31.4 is specifically for gastric diverticulum. Related codes cover acute dilatation of stomach (K31.0), adult hypertrophic pyloric stenosis (K31.1), Hourglass stricture and stenosis of stomach (K31.2), Pylorospasm, not elsewhere classified (K31.3), obstruction of duodenum (K31.5), fistula of stomach and duodenum (K31.6), polyp of stomach and duodenum (K31.7), other specified diseases of stomach and duodenum (K31.8) and 3 more.
Don't report K31.4 together with the conditions in its Excludes1 note: congenital diverticulum of stomach (Q40.2).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific stomach acquired diverticulum codes (official index)
- congenital Q40.2 — Other specified congenital malformations of stomach
Don't confuse with (Excludes1 for K31.4)
- congenital diverticulum of stomach (Q40.2)
Common questions about stomach acquired diverticulum ICD-10 codes
What is the ICD-10 code for stomach acquired diverticulum?
- K31.4 — Gastric diverticulum. More specific codes apply when the documentation supports them: Q40.2.
What is the ICD-10 code for congenital stomach acquired diverticulum?
- Q40.2 — Other specified congenital malformations of stomach.
Is K31.4 billable?
- Yes. K31.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K31.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K31.4 as a principal diagnosis.
Is K31.4 a CC or MCC?
- No. K31.4 is neither a CC nor an MCC under MS-DRG v44.0.