K29.0 — Acute gastritis
K29.0 is a non-billable header ICD-10-CM code for acute gastritis. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- erosion (acute) of stomach (K25.-)
Use additional code
Add a secondary code to capture the detail described below.
- code to identify:
- alcohol abuse and dependence (F10.-)
Excludes1 inherited from the categories above K29.0
These are not written on K29.0, but they bind it: a note on a category applies to every code beneath it. Billing K29.0 with anything listed here is a denial.
Other codes that can never be billed with K29.0
These codes carry an Excludes1 note pointing at K29.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading K29.0 alone.
Risk adjustment
K29.0 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.
Code history
K29.0 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead K29.0
2 child codes. Green means billable.
Related codes at this level
Codes that share K29. If K29.0 is not quite right, the correct code is usually one of these.
Questions about K29.0
- Is K29.0 a billable ICD-10-CM code?
- No. K29.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does K29.0 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Diseases of esophagus, stomach and duodenum (K20-K31).
- What cannot be coded together with K29.0?
- K29.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above K29.0 (K29) and apply to it just the same.