ICD-10-CM 2027
ICD-10 code for congenital peripheral aneurysm
From the official ICD-10-CM alphabetic index entry “Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › congenital (peripheral)”. Page updated September 29, 2026.
About coding congenital peripheral aneurysm
The ICD-10-CM code for congenital peripheral aneurysm is Q27.8 (Other specified congenital malformations of peripheral vascular system). The official index lists 10 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q27.8.
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.
More specific congenital peripheral aneurysm codes (official index)
- aorta (root) (sinus) Q25.43 — Congenital aneurysm of aorta
- brain Q28.3 — Other malformations of cerebral vessels
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- coronary Q24.5 — Malformation of coronary vessels
- digestive system Q27.8 — Other specified congenital malformations of peripheral vascular system
- lower limb Q27.8 — Other specified congenital malformations of peripheral vascular system
- pulmonary Q25.79 — Other congenital malformations of pulmonary artery
- retina Q14.1 — Congenital malformation of retina
- specified site NEC Q27.8 — Other specified congenital malformations of peripheral vascular system
- upper limb Q27.8 — Other specified congenital malformations of peripheral vascular system
Don't confuse with (Excludes1 for Q27.8)
- arteriovenous malformation (Q27.3-)
Common questions about congenital peripheral aneurysm ICD-10 codes
What is the ICD-10 code for congenital peripheral aneurysm?
- Q27.8 — Other specified congenital malformations of peripheral vascular system. More specific codes apply when the documentation supports them: Q25.43, Q28.3, I60.7, Q24.5 and others below.
What is the ICD-10 code for aorta congenital peripheral aneurysm?
- Q25.43 — Congenital aneurysm of aorta.
What is the ICD-10 code for brain congenital peripheral aneurysm?
- Q28.3 — Other malformations of cerebral vessels.
What is the ICD-10 code for coronary congenital peripheral aneurysm?
- Q24.5 — Malformation of coronary vessels.
What is the ICD-10 code for digestive system congenital peripheral aneurysm?
- Q27.8 — Other specified congenital malformations of peripheral vascular system.
What is the ICD-10 code for lower limb congenital peripheral aneurysm?
- Q27.8 — Other specified congenital malformations of peripheral vascular system.
What is the ICD-10 code for pulmonary congenital peripheral aneurysm?
- Q25.79 — Other congenital malformations of pulmonary artery.
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.