K31 ICD-10-CM Code: Other diseases of stomach and duodenum
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
K31Other diseases of stomach and duodenum
ICD-10-CM diagnosis code · United States clinical modification
Where K31 sits
- 1
Chapter 11
Diseases of the digestive system (K00-K95)
- 2
Section
Diseases of esophagus, stomach and duodenum (K20-K31)
- 3
Category K31
Other diseases of stomach and duodenum
- 4
Code K31
Other diseases of stomach and duodenum
Codes under K31
K31 is a non-billable category. Choose the child code that best matches the documented diagnosis.
K31.0Acute dilatation of stomachK31.1Adult hypertrophic pyloric stenosisK31.2Hourglass stricture and stenosis of stomachK31.3Pylorospasm, not elsewhere classifiedK31.4Gastric diverticulumK31.5Obstruction of duodenumK31.6Fistula of stomach and duodenumK31.7Polyp of stomach and duodenumK31.8Other specified diseases of stomach and duodenumK31.9Disease of stomach and duodenum, unspecifiedK31.AGastric intestinal metaplasiaK31.BHypertrophic pyloric stenosis, in childhoodNotes for this code
Inclusion terms
No inclusion terms are listed for K31.
Code first
No “code first” instruction is listed for K31.
Use additional code
No “use additional code” instruction is listed for K31.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for K31.
Excludes2
Conditions not included here that may be reported separately when present.
- diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
- diverticulum of duodenum (K57.00-K57.13)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code K31 mean?
K31 is the FY 2027 U.S. ICD-10-CM code for “Other diseases of stomach and duodenum.”
Is K31 a billable or specific ICD-10-CM code?
No. K31 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is K31 located in ICD-10-CM?
K31 is listed in Chapter 11, Diseases of the digestive system (K00-K95), within Diseases of esophagus, stomach and duodenum (K20-K31) (K20–K31), under category K31, Other diseases of stomach and duodenum.
What coding notes are listed for K31?
No inclusion terms are listed for K31 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43); diverticulum of duodenum (K57.00-K57.13).