ICD-10-CM 2027
ICD-10 code for Gastropathy
From the official ICD-10-CM alphabetic index entry “Gastropathy”. Page updated September 29, 2026.
About coding Gastropathy
The ICD-10-CM code for Gastropathy is K31.9 (Disease of stomach and duodenum, unspecified). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K31.9.
Within K31, choose K31.9 (Disease of stomach and duodenum, unspecified) only when documentation doesn't support a more specific option: 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), gastric diverticulum (K31.4), obstruction of duodenum (K31.5), fistula of stomach and duodenum (K31.6), polyp of stomach and duodenum (K31.7) and 3 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Gastropathy codes (official index)
- congestive portal (see also, Hypertension, portal) K31.89 — Other diseases of stomach and duodenum
- erythematous K29.70 — Gastritis, unspecified, without bleeding
- exudative K90.89 — Other intestinal malabsorption
- portal hypertensive (see also, Hypertension, portal) K31.89 — Other diseases of stomach and duodenum
- specified NEC K31.89 — Other diseases of stomach and duodenum
Common questions about Gastropathy ICD-10 codes
What is the ICD-10 code for Gastropathy?
- K31.9 — Disease of stomach and duodenum, unspecified. More specific codes apply when the documentation supports them: K31.89, K29.70, K90.89, K31.89 and others below.
What is the ICD-10 code for congestive portal gastropathy?
- K31.89 — Other diseases of stomach and duodenum.
What is the ICD-10 code for erythematous gastropathy?
- K29.70 — Gastritis, unspecified, without bleeding.
What is the ICD-10 code for exudative gastropathy?
- K90.89 — Other intestinal malabsorption.
What is the ICD-10 code for portal hypertensive gastropathy?
- K31.89 — Other diseases of stomach and duodenum.
Is K31.9 billable?
- Yes. K31.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K31.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K31.9 as a principal diagnosis.
Is K31.9 a CC or MCC?
- No. K31.9 is neither a CC nor an MCC under MS-DRG v44.0.