Coding and coverage · ICD-10-CM
K31 Other diseases of stomach and duodenum
Report one of the more specific codes below.
Codes under this one
- K31.0 Acute dilatation of stomach
- K31.1 Adult hypertrophic pyloric stenosis
- K31.2 Hourglass stricture and stenosis of stomach
- K31.3 Pylorospasm, not elsewhere classified
- K31.4 Gastric diverticulum
- K31.5 Obstruction of duodenum
- K31.6 Fistula of stomach and duodenum
- K31.7 Polyp of stomach and duodenum
- K31.8 Other specified diseases of stomach and duodenumHeader
- K31.9 Disease of stomach and duodenum, unspecified
- K31.A Gastric intestinal metaplasiaHeader
- K31.B Hypertrophic pyloric stenosis, in childhood
Instructional notes
Chapter 11
Excludes2Not included here: the patient may have both; report both when both are present.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Section K20-K31
Excludes2Not included here: the patient may have both; report both when both are present.
- hiatus hernia (K44.-)
Chapter 11: Diseases of the digestive system · K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31)
Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.
Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.