K29.00 Acute gastritis without bleeding

Billable ICD-10-CM code, FY2026.

Applies from K29 Gastritis and duodenitis

Excludes1 (never code together)

• eosinophilic gastritis or gastroenteritis (K52.81)
• Zollinger-Ellison syndrome (E16.4)

Applies from K29.0 Acute gastritis

Excludes1 (never code together)

• erosion (acute) of stomach (K25.-)

Use additional code

• code to identify:
• alcohol abuse and dependence (F10.-)

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 535.00 Acute gastritis, without mention of hemorrhage

Code annotations containing back-references to K29.00

Back-references to K29.0

• Type 1 Excludes: K25 Gastric ulcer ("acute gastritis (K29.0-)")

Back-references to K29

• Type 1 Excludes: K92.2 Gastrointestinal hemorrhage, unspecified ("gastritis and duodenitis with hemorrhage (K29.-)")

Diagnosis Index entries for K29.00

• Gastritis (simple) › acute (erosive)

Nearby codes

• K29 Gastritis and duodenitis
• K29.0 Acute gastritis
• K29.00 Acute gastritis without bleeding (this code)
• K29.01 Acute gastritis with bleeding
• K29.2 Alcoholic gastritis
• K29.20 Alcoholic gastritis without bleeding
• K29.21 Alcoholic gastritis with bleeding
• K29.3 Chronic superficial gastritis