K31.6
ICD-10BillableFistula of stomach and duodenum
Official ICD-10-CM descriptor (FY2026)
Fistula of stomach and duodenum
K31.6 is valid for submission on a claim — CMS flags it as a billable, specific code.
Inclusion terms
- Gastrocolic fistula
- Gastrojejunocolic fistula
Code also
Two codes may be needed; sequencing depends on the reason for the encounter.
- , if applicable, disruption of internal operation (surgical) wound (T81.32-)
Related codes in K31
- K31.0Acute dilatation of stomach
- K31.1Adult hypertrophic pyloric stenosis
- K31.2Hourglass stricture and stenosis of stomach
- K31.3Pylorospasm, not elsewhere classified
- K31.4Gastric diverticulum
- K31.5Obstruction of duodenum
- K31.7Polyp of stomach and duodenum
- K31.8Other specified diseases of stomach and duodenumcategory
- K31.9Disease of stomach and duodenum, unspecified
- K31.AGastric intestinal metaplasiacategory
Where this code sits
- Parent code
- K31
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.