I80.249

Billable

Phlebitis and thrombophlebitis of unspecified peroneal vein

HCC Category Mapping

V28HCC 267 — Vascular Disease

0.356

V24HCC 108 — Vascular Disease

0.297

ESRDHCC 108 — Vascular Disease

0.000

RxHCCHCC 215 — Pulmonary Embolism and Other Vascular Disease

0.000

What This Code Means

Inflammation and blood clot formation in a peroneal vein, but the specific side (right, left, or both) is not documented.

Coding Tips

•This is a less specific code; query the provider to determine laterality for more accurate coding (I80.241, I80.242, or I80.243)
•Avoid using this code when laterality can be determined from clinical documentation or imaging reports

Clinical Significance

Phlebitis and thrombophlebitis of the unspecified peroneal vein represents distal deep vein thrombosis in the lateral calf. The peroneal veins are paired deep veins running alongside the fibula. While considered lower risk than proximal deep vein thrombosis, peroneal vein thrombosis can extend into the popliteal vein and requires clinical decision-making about anticoagulation versus surveillance based on individual risk factors.

Documentation Requirements

✓Duplex ultrasound confirming peroneal vein thrombosis
✓Laterality — unspecified peroneal vein documented
✓Acuity — acute vs. chronic thrombosis
✓Assessment of clot extent and risk for proximal propagation
✓Clinical decision documentation for anticoagulation vs. serial surveillance
✓Risk factor assessment including recent immobility, surgery, or malignancy
✓Follow-up plan including repeat imaging if surveillance approach chosen

Commonly Confused Codes

I80.23x — Tibial vein thrombophlebitis: different paired deep veins in the calf I80.25x — Calf muscular vein thrombophlebitis: intramuscular veins (soleal, gastrocnemius) rather than axial veins I80.22x — Popliteal vein thrombophlebitis: more proximal, higher risk location I80.0x — Superficial vessel thrombophlebitis: superficial veins, not deep I80.20x — Unspecified deep vessels: less specific; use I80.24x when peroneal is documented

Code Hierarchy

└I80Phlebitis and thrombophlebitis └I80.2Phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremities └I80.24Phlebitis and thrombophlebitis of peroneal vein └I80.249Phlebitis and thrombophlebitis of unspecified peroneal vein

└I80.249Phlebitis and thrombophlebitis of unspecified peroneal vein