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  3. Ch. K00-K95
  4. Sec. K20-K31
  5. Category K29
Category K29

Gastritis and duodenitis

Clinical Classification Guidelines

Specific Diagnosis Codes

Acute gastritis
K29.0
Acute gastritis without bleeding
K29.00
Acute gastritis with bleeding
K29.01
Alcoholic gastritis
K29.2
Alcoholic gastritis without bleeding
K29.20
Alcoholic gastritis with bleeding
K29.21
Chronic superficial gastritis
K29.3
Chronic superficial gastritis without bleeding
K29.30
Chronic superficial gastritis with bleeding
K29.31
Chronic atrophic gastritis
K29.4
Chronic atrophic gastritis without bleeding
K29.40
Chronic atrophic gastritis with bleeding
K29.41
Unspecified chronic gastritis
K29.5
Unspecified chronic gastritis without bleeding
K29.50
Unspecified chronic gastritis with bleeding
K29.51
Other gastritis
K29.6
Other gastritis without bleeding
K29.60
Other gastritis with bleeding
K29.61
Gastritis, unspecified
K29.7
Gastritis, unspecified, without bleeding
K29.70
Gastritis, unspecified, with bleeding
K29.71
Duodenitis
K29.8
Duodenitis without bleeding
K29.80
Duodenitis with bleeding
K29.81
Gastroduodenitis, unspecified
K29.9
Gastroduodenitis, unspecified, without bleeding
K29.90
Gastroduodenitis, unspecified, with bleeding
K29.91
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Data updated for October 2025 release.

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