ICD-10-CM 2027
ICD-10 code for aorta nonsyphilitic arteritis
From the official ICD-10-CM alphabetic index entry “Arteritis › aorta (nonsyphilitic)”. Page updated September 29, 2026.
About coding aorta nonsyphilitic arteritis
The ICD-10-CM code for aorta nonsyphilitic arteritis is I77.6 (Arteritis, unspecified). The official index lists 1 more specific code, 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 aorta nonsyphilitic arteritis codes (official index)
- syphilitic A52.02 — Syphilitic aortitis
Don't confuse with (Excludes1 for I77.6)
Common questions about aorta nonsyphilitic arteritis ICD-10 codes
What is the ICD-10 code for aorta nonsyphilitic arteritis?
- I77.6 — Arteritis, unspecified. More specific codes apply when the documentation supports them: A52.02.
What is the ICD-10 code for syphilitic aorta nonsyphilitic arteritis?
- A52.02 — Syphilitic aortitis.
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.