A48.0 Gas gangrene

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applicable to

• Clostridial cellulitis
• Clostridial myonecrosis

Applies from A48 Other bacterial diseases, not elsewhere classified

Excludes1 (never code together)

• actinomycetoma (B47.1)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 263 — Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene
• CMS-HCC V22: HCC 106 — Atherosclerosis of the Extremities with Ulceration or Gangrene
• ESRD V24: HCC 106

MS-DRG index

Defines the logic of DRG(s) 791 in MDC 15.

Approximate ICD-9-CM (GEMs)

• 040.0 Gas gangrene

Code annotations containing back-references to A48.0

Back-references to A48.0

• Type 1 Excludes: A41.4 Sepsis due to anaerobes ("gas gangrene (A48.0)")
• Type 1 Excludes: I96 Gangrene, not elsewhere classified ("gas gangrene (A48.0)")

Diagnosis Index entries for A48.0

• Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › anerobic
• Aerogenes capsulatus infection
• Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) › anaerobic
• Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) › clostridial
• Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › Bacillus welchii
• Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › Clostridium perfringens or welchii
• Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › gas (bacillus)
• Gas › gangrene
• Infection, infected, infective (opportunistic) › aerogenes capsulatus
• Infection, infected, infective (opportunistic) › Bacillus › gas (gangrene)
• Infection, infected, infective (opportunistic) › Clostridioides › difficile › gas gangrene
• Infection, infected, infective (opportunistic) › Clostridium NEC › bifermentans
• Infection, infected, infective (opportunistic) › Clostridium NEC › difficile › gas gangrene
• Infection, infected, infective (opportunistic) › Clostridium NEC › gas-forming NEC
• Infection, infected, infective (opportunistic) › Clostridium NEC › histolyticum
• Infection, infected, infective (opportunistic) › Clostridium NEC › novyi, causing gas gangrene
• Infection, infected, infective (opportunistic) › Clostridium NEC › oedematiens
• Infection, infected, infective (opportunistic) › Clostridium NEC › perfringens › gas gangrene
• Infection, infected, infective (opportunistic) › Clostridium NEC › septicum, causing gas gangrene
• Infection, infected, infective (opportunistic) › Clostridium NEC › sordellii, causing gas gangrene
• Infection, infected, infective (opportunistic) › Clostridium NEC › welchii › gas gangrene
• Myonecrosis, clostridial
• Myositis › clostridial

Nearby codes

• A48 Other bacterial diseases, not elsewhere classified
• A48.0 Gas gangrene (this code)
• A48.1 Legionnaires' disease
• A48.2 Nonpneumonic Legionnaires' disease [Pontiac fever]
• A48.3 Toxic shock syndrome
• A48.4 Brazilian purpuric fever
• A48.5 Other specified botulism