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ICD-10-CM 2027

ICD-10 code for iliac vein thrombophlebitis

I80.21

Phlebitis and thrombophlebitis of iliac vein

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Thrombophlebitis › iliac vein (common) (external) (internal)”. Page updated September 29, 2026.

About coding iliac vein thrombophlebitis

The ICD-10-CM code for iliac vein thrombophlebitis is I80.21 (Phlebitis and thrombophlebitis of iliac vein).

Within I80.2 (phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremities), I80.21 is specifically for phlebitis and thrombophlebitis of iliac vein. Related codes cover unspecified deep vessels of lower extremities (I80.20), popliteal vein (I80.22), tibial vein (I80.23), peroneal vein (I80.24), calf muscular vein (I80.25) and other deep vessels of lower extremities (I80.29).

To report this condition, pick the subcode that matches the documentation: I80.211 (vein), I80.212 (vein), I80.213 (bilateral) and I80.219 (vein).

Code first: , if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy (O00-O07, O08.7) and phlebitis and thrombophlebitis complicating pregnancy, childbirth and the puerperium (O22.-, O87.-).

Common questions about iliac vein thrombophlebitis ICD-10 codes

What is the ICD-10 code for iliac vein thrombophlebitis?

I80.21 — Phlebitis and thrombophlebitis of iliac vein (a header code; report a more specific subcode).

Is I80.21 billable?

No. I80.21 is a header code. Report one of its more specific subcodes instead.