K31.A – Gastric intestinal metaplasia
ICD-10-CM 2027 diagnosis code · Diseases of esophagus, stomach and duodenum
ICD-10-CM code
K31.A
- Code
K31.A(claims format:K31A)- Description
- Gastric intestinal metaplasia
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 11. Diseases of the digestive system (K00-K95)
- Block
- K20-K31 Diseases of esophagus, stomach and duodenum
- Parent codes
- K31
Billable codes under K31.A
K31.A is a header code and cannot be used on claims. Choose the most specific code:
- K31.A0 – Gastric intestinal metaplasia, unspecifiedBillable
- K31.A1 – Gastric intestinal metaplasia without dysplasiaHeader (more codes below)
- K31.A2 – Gastric intestinal metaplasia with dysplasiaHeader (more codes below)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
K31 – Other diseases of stomach and duodenum
Includes:
- functional disorders of stomach
Excludes2 (not included here):
Block K20-K31
Excludes2 (not included here):
- hiatus hernia (K44.-)
Related codes in K31
- K31.0 – Acute dilatation of stomachBillable
- K31.1 – Adult hypertrophic pyloric stenosisBillable
- K31.B – Hypertrophic pyloric stenosis, in childhoodBillable
- K31.2 – Hourglass stricture and stenosis of stomachBillable
- K31.3 – Pylorospasm, not elsewhere classifiedBillable
- K31.4 – Gastric diverticulumBillable
- K31.5 – Obstruction of duodenumBillable
- K31.6 – Fistula of stomach and duodenumBillable
- K31.7 – Polyp of stomach and duodenumBillable
- K31.8 – Other specified diseases of stomach and duodenumHeader
- K31.9 – Disease of stomach and duodenum, unspecifiedBillable
Frequently asked questions
What is ICD-10 code K31.A?
K31.A is the ICD-10-CM code for gastric intestinal metaplasia, in the block K20-K31 (Diseases of esophagus, stomach and duodenum).
Is K31.A a billable code?
No. K31.A is a header code with more specific child codes; report one of the billable codes listed above.
What category does K31.A belong to?
It belongs to category K31 – Other diseases of stomach and duodenum.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.