ICD-10 Code I80.10 – Phlebitis and thrombophlebitis of unspecified femoral vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.10 – Phlebitis and thrombophlebitis of unspecified femoral vein
What it is
I80.10 identifies inflammation of a femoral vein with associated thrombosis, when the affected femoral vein is not further specified. Use it for documented thrombophlebitis in the femoral vein without a more precise laterality or site detail.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include leg pain, tenderness, swelling, warmth, or a palpable cord, but the diagnosis should be supported by the provider’s assessment and imaging when available.
When to use this code
Use this code when the chart states phlebitis or thrombophlebitis of the femoral vein and does not specify right or left. It also fits documentation that confirms femoral vein involvement but leaves the exact femoral segment unspecified. If the record names a more specific vein or side, code that detail instead.
Do not use for
Do not use I80.10 for superficial thrombophlebitis, other deep veins, or a clearly documented right or left femoral vein code when available. Check documentation if the note only says “DVT” without femoral vein detail.
Coding tip
Code from the provider’s exact vein description; unspecified should be used only when laterality or site is truly missing.