ICD-10-CM 2027
ICD-10 code for subclavian artery aberrant
From the official ICD-10-CM alphabetic index entry “Aberrant (congenital) › subclavian artery”. Page updated September 29, 2026.
About coding subclavian artery aberrant
The ICD-10-CM code for subclavian artery aberrant is Q27.8 (Other specified congenital malformations of peripheral vascular system).
Within Q27, choose Q27.8 (Other specified congenital malformations of peripheral vascular system) only when documentation doesn't support a more specific option: congenital absence and hypoplasia of umbilical artery (Q27.0), congenital renal artery stenosis (Q27.1), other congenital malformations of renal artery (Q27.2), arteriovenous malformation (peripheral) (Q27.3), congenital phlebectasia (Q27.4) and congenital malformation of peripheral vascular system, unspecified (Q27.9).
Don't report Q27.8 together with the conditions in its Excludes1 note: arteriovenous malformation (Q27.3-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for Q27.8)
- arteriovenous malformation (Q27.3-)
Common questions about subclavian artery aberrant ICD-10 codes
What is the ICD-10 code for subclavian artery aberrant?
- Q27.8 — Other specified congenital malformations of peripheral vascular system.
Is Q27.8 billable?
- Yes. Q27.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q27.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q27.8 as a principal diagnosis.
Is Q27.8 a CC or MCC?
- No. Q27.8 is neither a CC nor an MCC under MS-DRG v44.0.