ICD-10 Code I80.231 – Phlebitis and thrombophlebitis of right tibial vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.231 – Phlebitis and thrombophlebitis of right tibial vein
What it is
I80.231 identifies inflammation and clot formation in the right tibial vein, a deep vein in the lower leg. Use it when documentation specifies the right tibial vein as the site of deep vein thrombosis or thrombophlebitis.
Clinical signs
Clinical features may include unilateral leg pain, swelling, warmth, tenderness, or redness. Imaging or provider documentation should confirm involvement of the right tibial vein; clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents phlebitis or thrombophlebitis limited to the right tibial vein, including an acute or current deep venous clot at that site. It is appropriate when laterality and vein location are clearly stated. Check documentation if the note only says leg DVT or calf vein thrombosis.
Do not use for
Do not use this code for superficial thrombophlebitis, unspecified lower-extremity DVT, or thrombosis in another vein. If the record does not identify the right tibial vein, check documentation.
Coding tip
Verify both laterality and the exact vein name before assigning I80.231.