ICD-10 Code I80.12 – Phlebitis and thrombophlebitis of left femoral vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.12 – Phlebitis and thrombophlebitis of left femoral vein
What it is
I80.12 identifies inflammation and clot formation in the left femoral vein, a deep vein in the thigh. Use it when documentation specifically states the left femoral vein is involved.
Clinical signs
Typical findings include localized thigh pain, tenderness, swelling, warmth, and sometimes erythema. Clinical features vary; refer to documentation, and confirm that the femoral vein on the left side is named.
When to use this code
Use this code when the provider documents phlebitis, thrombophlebitis, or a deep vein thrombosis involving the left femoral vein. It also fits cases where imaging or clinical assessment clearly identifies that vein. If the laterality or vein location is unclear, check documentation before assigning the code.
Do not use for
Do not use it for superficial vein thrombophlebitis, unspecified leg DVT, or right-sided femoral vein disease. If the record does not specify the left femoral vein, choose a more accurate code or check documentation.
Coding tip
Match the code to both the vein and the side; “femoral vein” alone is not enough when laterality is missing.