K31.6

Billable

Fistula of stomach and duodenum

K31.6 is the ICD-10-CM code for Fistula of stomach and duodenum. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
K00-K95
Parent
K31
Edition
FY2026

K00-K95 Diseases of the digestive system

What this means — in plain language

MedlinePlus · NIH

A fistula is an abnormal connection between two parts inside of the body. Fistulas may develop between different organs, such as between the esophagus and the windpipe or the bowel and the vagina. They can also develop between two blood vessels, such as between an artery and a vein or between two arteries. Some people are born with a fistula. Other common causes of fistulas include: Complications from surgery Injury…

Read more about Fistulas at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Includes

  • Gastrocolic fistula
  • Gastrojejunocolic fistula

Notes

  • , if applicable, disruption of internal operation (surgical) wound (T81.32-)

Frequently asked questions

What is ICD-10 code K31.6?
K31.6 is the ICD-10-CM code for "Fistula of stomach and duodenum". It falls under K00-K95 Diseases of the digestive system.
Is K31.6 a billable code?
Yes — K31.6 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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