K31.A1 – Gastric intestinal metaplasia without dysplasia
ICD-10-CM 2027 diagnosis code · Diseases of esophagus, stomach and duodenum
ICD-10-CM code
K31.A1
- Code
K31.A1(claims format:K31A1)- Description
- Gastric intestinal metaplasia without dysplasia
- 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 › K31.A
Billable codes under K31.A1
K31.A1 is a header code and cannot be used on claims. Choose the most specific code:
- K31.A11 – Gastric intestinal metaplasia without dysplasia, involving the antrumBillable
- K31.A12 – Gastric intestinal metaplasia without dysplasia, involving the body (corpus)Billable
- K31.A13 – Gastric intestinal metaplasia without dysplasia, involving the fundusBillable
- K31.A14 – Gastric intestinal metaplasia without dysplasia, involving the cardiaBillable
- K31.A15 – Gastric intestinal metaplasia without dysplasia, involving multiple sitesBillable
- K31.A19 – Gastric intestinal metaplasia without dysplasia, unspecified siteBillable
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.A
Frequently asked questions
What is ICD-10 code K31.A1?
K31.A1 is the ICD-10-CM code for gastric intestinal metaplasia without dysplasia, in the block K20-K31 (Diseases of esophagus, stomach and duodenum).
Is K31.A1 a billable code?
No. K31.A1 is a header code with more specific child codes; report one of the billable codes listed above.
What category does K31.A1 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.