ICD-10-CM 2027
ICD-10 code for Thromboangiitis
From the official ICD-10-CM alphabetic index entry “Thromboangiitis”. Page updated September 29, 2026.
About coding Thromboangiitis
The ICD-10-CM code for Thromboangiitis is I73.1 (Thromboangiitis obliterans [Buerger's disease]). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I73.1.
Within I73 (other peripheral vascular diseases), I73.1 is specifically for Thromboangiitis obliterans [Buerger's disease]. Related codes cover Raynaud's syndrome (I73.0), other specified peripheral vascular diseases (I73.8) and peripheral vascular disease, unspecified (I73.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 299 (Peripheral Vascular Disorders with MCC, relative weight 1.5842), DRG 300 (Peripheral Vascular Disorders with CC, relative weight 1.0464) and DRG 301 (Peripheral Vascular Disorders without CC/MCC, relative weight 0.7133), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Thromboangiitis codes (official index)
Common questions about Thromboangiitis ICD-10 codes
What is the ICD-10 code for Thromboangiitis?
- I73.1 — Thromboangiitis obliterans [Buerger's disease]. More specific codes apply when the documentation supports them: I73.1, I67.89, I67.89, I67.89.
What is the ICD-10 code for obliterans thromboangiitis?
- I73.1 — Thromboangiitis obliterans [Buerger's disease].
Is I73.1 billable?
- Yes. I73.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I73.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I73.1 as a principal diagnosis.
Is I73.1 a CC or MCC?
- No. I73.1 is neither a CC nor an MCC under MS-DRG v44.0.