I80.242
BillablePhlebitis and thrombophlebitis of left peroneal vein
HCC Category Mapping
V28HCC 267 — Vascular Disease
0.356V24HCC 108 — Vascular Disease
0.297ESRDHCC 108 — Vascular Disease
0.000RxHCCHCC 215 — Pulmonary Embolism and Other Vascular Disease
0.000What This Code Means
This code describes inflammation and blood clot formation in the peroneal vein (a deep vein in the lower leg) on the left side. This condition causes pain, swelling, and warmth in the affected leg and requires medical treatment to prevent complications.
Coding Tips
- •Verify laterality is documented as 'left' in the medical record before assigning this code; right-sided or bilateral cases require different codes (I80.241 or I80.243)
- •Confirm the diagnosis specifies both phlebitis (inflammation) and thrombophlebitis (blood clot) or document which component is present, as some cases may only involve one condition
Clinical Significance
Phlebitis and thrombophlebitis of the left 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 — left 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 calfI80.25x — Calf muscular vein thrombophlebitis: intramuscular veins (soleal, gastrocnemius) rather than axial veinsI80.22x — Popliteal vein thrombophlebitis: more proximal, higher risk locationI80.0x — Superficial vessel thrombophlebitis: superficial veins, not deepI80.20x — 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└I80.242Phlebitis and thrombophlebitis of left peroneal vein
└I80.242Phlebitis and thrombophlebitis of left peroneal vein