ICD-10-CM 2027
ICD-10 code for venous aneurysm
From the official ICD-10-CM alphabetic index entry “Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › venous”. Page updated September 29, 2026.
About coding venous aneurysm
The ICD-10-CM code for venous aneurysm is I86.8 (Varicose veins of other specified sites). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I86.8.
Within I86, choose I86.8 (Varicose veins of other specified sites) only when documentation doesn't support a more specific option: sublingual varices (I86.0), scrotal varices (I86.1), pelvic varices (I86.2), Vulval varices (I86.3) and gastric varices (I86.4).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 299 (Peripheral Vascular Disorders with MCC, relative weight 1.5842), DRG 300 (Peripheral Vascular Disorders with CC, relative weight 1.0464) and DRG 301 (Peripheral Vascular Disorders without CC/MCC, relative weight 0.7133), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific venous aneurysm codes (official index)
- congenital Q27.8 — Other specified congenital malformations of peripheral vascular system
- digestive system Q27.8 — Other specified congenital malformations of peripheral vascular system
- lower limb Q27.8 — Other specified congenital malformations of peripheral vascular system
- 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
Common questions about venous aneurysm ICD-10 codes
What is the ICD-10 code for venous aneurysm?
- I86.8 — Varicose veins of other specified sites. More specific codes apply when the documentation supports them: Q27.8, Q27.8, Q27.8, Q27.8 and others below.
What is the ICD-10 code for congenital venous aneurysm?
- Q27.8 — Other specified congenital malformations of peripheral vascular system.
Is I86.8 billable?
- Yes. I86.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I86.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I86.8 as a principal diagnosis.
Is I86.8 a CC or MCC?
- No. I86.8 is neither a CC nor an MCC under MS-DRG v44.0.