ICD-10-CM 2027
ICD-10 code for angiitis
From the official ICD-10-CM alphabetic index entry “Angiitis”. Page updated September 29, 2026.
About coding angiitis
The ICD-10-CM code for angiitis is I77.6 (Arteritis, unspecified). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I77.6.
Within I77, choose I77.6 (Arteritis, unspecified) only when documentation doesn't support a more specific option: arteriovenous fistula, acquired (I77.0), stricture of artery (I77.1), rupture of artery (I77.2), arterial fibromuscular dysplasia (I77.3), celiac artery compression syndrome (I77.4), necrosis of artery (I77.5), other arterial dissection (I77.7), other specified disorders of arteries and arterioles (I77.8) and 1 more.
Don't report I77.6 together with the conditions in its Excludes1 note: aortic arch (M31.4), cerebral NEC (I67.7), coronary (I25.89), deformans (I70.-) and 3 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific angiitis codes (official index)
- allergic granulomatous M30.1 — Polyarteritis with lung involvement [Churg-Strauss]
- hypersensitivity M31.0 — Hypersensitivity angiitis
- necrotizing M31.9 — Necrotizing vasculopathy, unspecified
- specified NEC M31.8 — Other specified necrotizing vasculopathies
- nervous system, granulomatous I67.7 — Cerebral arteritis, not elsewhere classified
Don't confuse with (Excludes1 for I77.6)
Common questions about angiitis ICD-10 codes
What is the ICD-10 code for angiitis?
- I77.6 — Arteritis, unspecified. More specific codes apply when the documentation supports them: M30.1, M31.0, M31.9, M31.8 and others below.
What is the ICD-10 code for allergic granulomatous angiitis?
- M30.1 — Polyarteritis with lung involvement [Churg-Strauss].
What is the ICD-10 code for hypersensitivity angiitis?
- M31.0 — Hypersensitivity angiitis.
What is the ICD-10 code for necrotizing angiitis?
- M31.9 — Necrotizing vasculopathy, unspecified.
Is I77.6 billable?
- Yes. I77.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I77.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I77.6 as a principal diagnosis.
Is I77.6 a CC or MCC?
- No. I77.6 is neither a CC nor an MCC under MS-DRG v44.0.