U.S. ICD-10-CM · FY 2027

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.

Code definition

Official description

K31

Other diseases of stomach and duodenum

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where K31 sits

  1. 1

    Chapter 11

    Diseases of the digestive system (K00-K95)

  2. 2

    Section

    Diseases of esophagus, stomach and duodenum (K20-K31)

  3. 3

    Category K31

    Other diseases of stomach and duodenum

  4. 4

    Code K31

    Other diseases of stomach and duodenum

More specific choices

Codes under K31

K31 is a non-billable category. Choose the child code that best matches the documented diagnosis.

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

K31.9

Disease of stomach and duodenum, unspecified

K31.A

Gastric intestinal metaplasia

K31.B

Hypertrophic pyloric stenosis, in childhood

Documentation details

Notes 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)

Transparency

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.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

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).

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