ICD-10 Code I80.251 – Phlebitis and thrombophlebitis of right calf muscular vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.251 – Phlebitis and thrombophlebitis of right calf muscular vein
What it is
I80.251 identifies inflammation and clot formation in a muscular vein of the right calf. Use it when documentation specifies superficial or deep thrombophlebitic involvement limited to that right-sided calf vein.
Clinical signs
Typical findings include localized calf pain, tenderness, swelling, warmth, or redness. Clinical features vary; refer to documentation and confirm the affected vein is in the right calf muscular vein.
When to use this code
Use this code when the provider documents phlebitis or thrombophlebitis in a muscular vein of the right calf. It also applies when imaging or the note clearly identifies that exact site. If the record only says “leg vein” or “DVT,” check documentation before coding.
Do not use for
Do not use it for left-sided disease, unspecified calf veins, or thrombosis in a different lower-extremity vein. Check documentation if the note describes varicose veins, embolism, or a nonspecific clot site.
Coding tip
Code the laterality and exact vein location exactly as documented; if either is missing, query before assigning I80.251.