ICD-10-CM › K00-K95 › K20-K31 › K codes › K31

K31

Other diseases of stomach and duodenum

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 12 more specific codes instead:

  • 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 duodenum (also a header)
  • K31.9 Disease of stomach and duodenum, unspecified
  • K31.A Gastric intestinal metaplasia (also a header)
  • K31.B Hypertrophic pyloric stenosis, in childhood

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Other diseases of stomach and duodenum

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Excludes2 - not included here

  • diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
  • diverticulum of duodenum (K57.00-K57.13)

Includes

  • functional disorders of stomach

Inherited from the K20-K31 section Diseases of esophagus, stomach and duodenum (K20-K31)

Excludes2 - not included here

  • hiatus hernia (K44.-)