I73.1 Thromboangiitis obliterans [Buerger's disease]

Billable ICD-10-CM code, FY2026.

Applies from I73 Other peripheral vascular diseases

Excludes2 (not included here)

• chilblains (T69.1)
• frostbite (T33-T34)
• immersion hand or foot (T69.0-)
• spasm of cerebral artery (G45.9)

Risk adjustment (HCC)

• CMS-HCC V22: HCC 108 — Vascular Disease
• ESRD V24: HCC 108

MS-DRG index

Defines the logic of DRG(s) 299-301 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 443.1 Thromboangiitis obliterans [Buerger's disease]

Code annotations containing back-references to I73.1

Back-references to I73

• Type 1 Excludes: I96 Gangrene, not elsewhere classified ("gangrene in other peripheral vascular diseases (I73.-)")

Diagnosis Index entries for I73.1

• Buerger's disease (thromboangiitis obliterans)
• Disease, diseased › Buerger's (thromboangiitis obliterans)
• Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › presenile
• Thromboangiitis
• Thromboangiitis › obliterans (general)

Nearby codes

• I73 Other peripheral vascular diseases
• I73.0 Raynaud's syndrome
• I73.00 Raynaud's syndrome without gangrene
• I73.01 Raynaud's syndrome with gangrene
• I73.1 Thromboangiitis obliterans [Buerger's disease] (this code)
• I73.8 Other specified peripheral vascular diseases
• I73.81 Erythromelalgia
• I73.89 Other specified peripheral vascular diseases
• I73.9 Peripheral vascular disease, unspecified