ICD-10-CM 2027
ICD-10 code for gastritis
From the official ICD-10-CM alphabetic index entry “Gastritis (simple)”. Page updated September 29, 2026.
About coding gastritis
The ICD-10-CM code for gastritis is K29.70 (Gastritis, unspecified, without bleeding). The official index lists 33 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K29.70.
Within K29.7, choose K29.70 (without bleeding) only when documentation doesn't support a more specific option: with bleeding (K29.71).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific gastritis codes (official index)
- with bleeding K29.71 — Gastritis, unspecified, with bleeding
- acute (erosive) K29.00 — Acute gastritis without bleeding
- with bleeding K29.01 — Acute gastritis with bleeding
- alcoholic K29.20 — Alcoholic gastritis without bleeding
- with bleeding K29.21 — Alcoholic gastritis with bleeding
- allergic K29.60 — Other gastritis without bleeding
- with bleeding K29.61 — Other gastritis with bleeding
- atrophic (chronic) K29.40 — Chronic atrophic gastritis without bleeding
- with bleeding K29.41 — Chronic atrophic gastritis with bleeding
- chronic (antral) (fundal) K29.50 — Unspecified chronic gastritis without bleeding
- with bleeding K29.51 — Unspecified chronic gastritis with bleeding
- atrophic K29.40 — Chronic atrophic gastritis without bleeding
- with bleeding K29.41 — Chronic atrophic gastritis with bleeding
- superficial K29.30 — Chronic superficial gastritis without bleeding
- with bleeding K29.31 — Chronic superficial gastritis with bleeding
- dietary counseling and surveillance Z71.3 — Dietary counseling and surveillance
- due to diet deficiency E63.9 — Nutritional deficiency, unspecified
- eosinophilic K52.81 — Eosinophilic gastritis or gastroenteritis
- giant hypertrophic K29.60 — Other gastritis without bleeding
- with bleeding K29.61 — Other gastritis with bleeding
- granulomatous K29.60 — Other gastritis without bleeding
- with bleeding K29.61 — Other gastritis with bleeding
- hypertrophic (mucosa) K29.60 — Other gastritis without bleeding
- with bleeding K29.61 — Other gastritis with bleeding
- nervous F54 — Psychological and behavioral factors associated with disorders or diseases classified elsewhere
- spastic K29.60 — Other gastritis without bleeding
- with bleeding K29.61 — Other gastritis with bleeding
- specified NEC K29.60 — Other gastritis without bleeding
- with bleeding K29.61 — Other gastritis with bleeding
- superficial chronic K29.30 — Chronic superficial gastritis without bleeding
- with bleeding K29.31 — Chronic superficial gastritis with bleeding
- tuberculous A18.83 — Tuberculosis of digestive tract organs, not elsewhere classified
- viral NEC A08.4 — Viral intestinal infection, unspecified
Common questions about gastritis ICD-10 codes
What is the ICD-10 code for gastritis?
- K29.70 — Gastritis, unspecified, without bleeding. More specific codes apply when the documentation supports them: K29.71, K29.00, K29.01, K29.20 and others below.
What is the ICD-10 code for acute gastritis?
- K29.00 — Acute gastritis without bleeding.
What is the ICD-10 code for alcoholic gastritis?
- K29.20 — Alcoholic gastritis without bleeding.
What is the ICD-10 code for allergic gastritis?
- K29.60 — Other gastritis without bleeding.
What is the ICD-10 code for atrophic gastritis?
- K29.40 — Chronic atrophic gastritis without bleeding.
What is the ICD-10 code for chronic gastritis?
- K29.50 — Unspecified chronic gastritis without bleeding.
What is the ICD-10 code for dietary counseling and surveillance gastritis?
- Z71.3 — Dietary counseling and surveillance.
Is K29.70 billable?
- Yes. K29.70 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K29.70 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K29.70 as a principal diagnosis.
Is K29.70 a CC or MCC?
- No. K29.70 is neither a CC nor an MCC under MS-DRG v44.0.