ICD-10 Code I80.222 – Phlebitis and thrombophlebitis of left popliteal vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.222 – Phlebitis and thrombophlebitis of left popliteal vein
What it is
This code identifies inflammation and clot formation in the left popliteal vein, the deep vein behind the knee. Use it when documentation specifies the left side and the popliteal vein.
Clinical signs
Typical findings include localized leg pain, swelling, warmth, tenderness, and sometimes redness along the affected limb. Clinical features vary; refer to documentation for confirmed laterality and vein location.
When to use this code
Use I80.222 when the provider documents phlebitis or thrombophlebitis involving the left popliteal vein. It is appropriate for confirmed deep vein inflammation or thrombosis in that exact site. Check documentation if the record only states DVT, venous thrombosis, or a different vein.
Do not use for
Do not use this code for superficial thrombophlebitis, unspecified leg vein involvement, or right-sided disease. If the chart does not specify the left popliteal vein, check documentation.
Coding tip
Verify both laterality and the exact vein named in the note before assigning this code.