ICD-10-CM 2027
ICD-10 code for vein dilatation
From the official ICD-10-CM alphabetic index entry “Dilatation › vein”. Page updated September 29, 2026.
About coding vein dilatation
The ICD-10-CM code for vein dilatation is I86.8 (Varicose veins of other specified sites).
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.
Common questions about vein dilatation ICD-10 codes
What is the ICD-10 code for vein dilatation?
- I86.8 — Varicose veins of other specified sites.
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.