ICD-10 Code I80.253 – Phlebitis and thrombophlebitis of calf muscular vein, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.253 – Phlebitis and thrombophlebitis of calf muscular vein, bilateral
What it is
I80.253 identifies inflammation and clot formation in the calf muscular veins on both sides. Use it when documentation specifies bilateral involvement of the muscular veins in the calf.
Clinical signs
Typical findings include localized calf pain, tenderness, swelling, warmth, and sometimes redness. Clinical features vary; refer to documentation, especially when imaging or exam confirms bilateral calf muscular vein thrombophlebitis.
When to use this code
Use this code when the provider documents phlebitis or thrombophlebitis affecting the calf muscular veins in both legs. It is appropriate when the record clearly states bilateral disease, or when laterality is documented as both sides.
Choose this code for confirmed superficial or deep venous inflammation involving the specified calf muscular veins, not for vague leg pain or swelling alone. Check documentation if the note does not clearly identify the vein segment or side.
Do not use for
Do not use it for unilateral calf vein disease, unspecified lower-extremity thrombophlebitis, or thrombosis in a different venous location. Check documentation when the anatomy or laterality is unclear.
Coding tip
Verify both the vein location and bilateral laterality in the provider note before assigning I80.253.