K31.A12 — Gastric intestinal metaplasia without dysplasia, involving the body (corpus)
K31.A12 is a billable, specific ICD-10-CM code for gastric intestinal metaplasia without dysplasia, involving the body (corpus). It is valid for submission on a claim.
Risk adjustment
K31.A12 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
K31.A12 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56389Billing and Coding: Upper Gastrointestinal Endoscopy and Visualization
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy
- A57414Billing and Coding: Upper Gastrointestinal Endoscopy (Diagnostic and Therapeutic)
How K31.A12 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to K31.A12.
- Metaplasia›gastric intestinal›without dysplasia›involving›body(corpus)
Related codes at this level
Codes that share K31.A1. If K31.A12 is not quite right, the correct code is usually one of these.
- K31.A11Gastric intestinal metaplasia without dysplasia, involving the antrum
- K31.A13Gastric intestinal metaplasia without dysplasia, involving the fundus
- K31.A14Gastric intestinal metaplasia without dysplasia, involving the cardia
- K31.A15Gastric intestinal metaplasia without dysplasia, involving multiple sites
- K31.A19Gastric intestinal metaplasia without dysplasia, unspecified site
Questions about K31.A12
- Is K31.A12 a billable ICD-10-CM code?
- Yes. K31.A12 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does K31.A12 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Diseases of esophagus, stomach and duodenum (K20-K31).