ICD-10-CM 2027
ICD-10 code for arteritis
From the official ICD-10-CM alphabetic index entry “Arteritis”. Page updated September 29, 2026.
About coding arteritis
The ICD-10-CM code for arteritis is I77.6 (Arteritis, unspecified). The official index lists 31 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 arteritis codes (official index)
- allergic M31.0 — Hypersensitivity angiitis
- aorta (nonsyphilitic) I77.6 — Arteritis, unspecified
- syphilitic A52.02 — Syphilitic aortitis
- aortic arch M31.4 — Aortic arch syndrome [Takayasu]
- brachiocephalic M31.4 — Aortic arch syndrome [Takayasu]
- brain I67.7 — Cerebral arteritis, not elsewhere classified
- syphilitic A52.04 — Syphilitic cerebral arteritis
- cerebral I67.7 — Cerebral arteritis, not elsewhere classified
- in
- diseases classified elsewhere I68.2 — Cerebral arteritis in other diseases classified elsewhere
- systemic lupus erythematosus M32.19 — Other organ or system involvement in systemic lupus erythematosus
- listerial A32.89 — Other forms of listeriosis
- syphilitic A52.04 — Syphilitic cerebral arteritis
- tuberculous A18.89 — Tuberculosis of other sites
- coronary (artery) I25.89 — Other forms of chronic ischemic heart disease
- rheumatic I01.8 — Other acute rheumatic heart disease
- chronic I09.89 — Other specified rheumatic heart diseases
- syphilitic A52.06 — Other syphilitic heart involvement
- cranial (left) (right), giant cell M31.6 — Other giant cell arteritis
- deformans
- giant cell NEC M31.6 — Other giant cell arteritis
- with polymyalgia rheumatica M31.5 — Giant cell arteritis with polymyalgia rheumatica
- necrosing or necrotizing M31.9 — Necrotizing vasculopathy, unspecified
- specified NEC M31.8 — Other specified necrotizing vasculopathies
- nodosa M30.0 — Polyarteritis nodosa
- obliterans
- pulmonary I28.8 — Other diseases of pulmonary vessels
- rheumatic
- senile
- suppurative I77.2 — Rupture of artery
- syphilitic (general) A52.09 — Other cardiovascular syphilis
- brain A52.04 — Syphilitic cerebral arteritis
- coronary A52.06 — Other syphilitic heart involvement
- spinal A52.09 — Other cardiovascular syphilis
- temporal, giant cell M31.6 — Other giant cell arteritis
- young female aortic arch syndrome M31.4 — Aortic arch syndrome [Takayasu]
Don't confuse with (Excludes1 for I77.6)
Common questions about arteritis ICD-10 codes
What is the ICD-10 code for arteritis?
- I77.6 — Arteritis, unspecified. More specific codes apply when the documentation supports them: M31.0, I77.6, A52.02, M31.4 and others below.
What is the ICD-10 code for allergic arteritis?
- M31.0 — Hypersensitivity angiitis.
What is the ICD-10 code for aorta arteritis?
- I77.6 — Arteritis, unspecified.
What is the ICD-10 code for aortic arch arteritis?
- M31.4 — Aortic arch syndrome [Takayasu].
What is the ICD-10 code for brachiocephalic arteritis?
- M31.4 — Aortic arch syndrome [Takayasu].
What is the ICD-10 code for brain arteritis?
- I67.7 — Cerebral arteritis, not elsewhere classified.
What is the ICD-10 code for cerebral arteritis?
- I67.7 — Cerebral arteritis, not elsewhere classified.
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.