Gastritis and duodenitis (K29) ICD-10-CM
The K29 code range covers gastritis and duodenitis with 28 ICD-10-CM diagnosis codes. 18 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the K29 Range 28 codes · 18 billable
- K29 Gastritis and duodenitisNon-billable
- K29.0 Acute gastritisNon-billable
- K29.00 Acute gastritis without bleeding
- K29.01 Acute gastritis with bleeding
- K29.2 Alcoholic gastritisNon-billable
- K29.20 Alcoholic gastritis without bleeding
- K29.21 Alcoholic gastritis with bleeding
- K29.3 Chronic superficial gastritisNon-billable
- K29.30 Chronic superficial gastritis without bleeding
- K29.31 Chronic superficial gastritis with bleeding
- K29.4 Chronic atrophic gastritisNon-billable
- K29.40 Chronic atrophic gastritis without bleeding
- K29.41 Chronic atrophic gastritis with bleeding
- K29.5 Unspecified chronic gastritisNon-billable
- K29.50 Unspecified chronic gastritis without bleeding
- K29.51 Unspecified chronic gastritis with bleeding
- K29.6 Other gastritisNon-billable
- K29.60 Other gastritis without bleeding
- K29.61 Other gastritis with bleeding
- K29.7 Gastritis, unspecifiedNon-billable
- K29.70 Gastritis, unspecified, without bleeding
- K29.71 Gastritis, unspecified, with bleeding
- K29.8 DuodenitisNon-billable
- K29.80 Duodenitis without bleeding
- K29.81 Duodenitis with bleeding
- K29.9 Gastroduodenitis, unspecifiedNon-billable
- K29.90 Gastroduodenitis, unspecified, without bleeding
- K29.91 Gastroduodenitis, unspecified, with bleeding
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the K29 range.
Acute Gastritis
Acute inflammation of the stomach.
Alcoholic Gastritis
Inflammation of the stomach resulting from alcohol ingestion.
Chronic Atrophic Gastritis
Atrophic gastritis that is persistent and long-standing.
Duodenitis
Inflammation of the DUODENUM section of the small intestine (INTESTINE, SMALL). Erosive duodenitis may cause bleeding in the UPPER GI TRACT and PEPTIC ULCER.
Gastritis
Inflammation of the GASTRIC MUCOSA, a lesion observed in a number of unrelated disorders.
About the K29 Code Range
Gastritis concerns the stomach, duodenitis concerns the duodenum, and gastroduodenitis names both together.
Within K29, the gastritis branches distinguish acute, alcoholic, chronic superficial, chronic atrophic, other, and unspecified forms. Duodenitis has its own branch, while gastroduodenitis has an unspecified branch. Each branch splits into codes with bleeding and without bleeding.
Questions About This Page
How many billable codes are in the K29 range?
Of the 28 codes in this range, 18 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the K29 range classify?
The range classifies gastritis and duodenitis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
