DA42.73

ICD-11 MMS 2026-01

Chronic atrophic gastritis of unknown aetiology

Description

Persistent or recurrent inflammation of the gastric mucosa with atrophy leading to decreased hydrochloric acid concentration in the gastric juice. Atrophic gastritis frequently progresses from chronic gastritis.

Index terms

  • Chronic atrophic gastritis of unknown aetiology
  • AG - [atrophic gastritis]
  • CAG - [chronic atrophic gastritis]
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  • Gastric atrophy
  • atrophic gastritis
  • nonerosive atrophic gastritis
  • stomach atrophy
  • Mild to moderate gastric atrophy of unknown aetiology
  • Severe gastric atrophy of unknown aetiology

Inclusions

  • Gastric atrophy

Exclusions from above levels

  • DD50.0 – Diaphragmatic hernia
  • DE12.1 – Gastrostomy malfunction
  • 01 – Certain infectious or parasitic diseases
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  • 02 – Neoplasms
  • 05 – Endocrine, nutritional or metabolic diseases
  • 06 – Mental, behavioural or neurodevelopmental disorders
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • DA42.70 – Acute superficial gastritis of unknown aetiology
  • DA42.71 – Chronic superficial gastritis of unknown aetiology
  • DA42.72 – Acute haemorrhagic gastritis of unknown aetiology
  • DA42.74 – Metaplastic gastritis of unknown aetiology
  • DA42.75 – Granulomatous gastritis of unknown aetiology
  • DA42.76 – Hypertrophic gastritis of unknown aetiology
  • DA42.7Y – Other specified gastritis of unknown aetiology with specific endoscopic or pathological features

Foundation entity

Chronic atrophic gastritis of unknown aetiology – http://id.who.int/icd/entity/1456893797

Allowed postcoordination axes

Part of: DA42.7: Gastritis of unknown aetiology with specific endoscopic or pathological features › DA42: Gastritis › 13: Diseases of the digestive system