ICD-10 Code I80.219 – Phlebitis and thrombophlebitis of unspecified iliac vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.219 – Phlebitis and thrombophlebitis of unspecified iliac vein
What it is
This code identifies inflammation and clotting in an iliac vein when the record does not specify laterality. Use it for documented phlebitis or thrombophlebitis involving the iliac vein, with the side left unspecified.
Clinical signs
Clinical features may include pelvic or lower-extremity pain, swelling, tenderness, and signs of venous obstruction. Clinical features vary; refer to documentation for the exact vessel involved and whether the thrombosis is acute or chronic.
When to use this code
Use I80.219 when the provider documents phlebitis or thrombophlebitis of an iliac vein but does not state left or right. It also fits charted iliac vein thrombosis with unspecified laterality. If the note names a different venous site, choose the more specific code.
Do not use for
Do not use this code for thrombosis in a named iliac vein side when documentation supports a laterality-specific code. Do not use it for superficial thrombophlebitis or for non-iliac venous thrombosis; check documentation.
Coding tip
Query for laterality whenever the iliac vein is mentioned, because unspecified coding should be a last resort.