ICD-10 Code for Gastroduodenitis
The ICD-10-CM code for gastroduodenitis is K29.90 — Gastroduodenitis, unspecified, without bleeding. This is the code the Alphabetic Index gives for gastroduodenitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
K29.90 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which gastroduodenitis code should you use?
The Alphabetic Index lists 4 codes under Gastroduodenitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
Gastroduodenitis virus, viral
| specified type NEC | A08.39 | Other viral enteritis |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources