I82.461
BillableAcute embolism and thrombosis of right calf muscular 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
A blood clot that suddenly forms in the right calf muscle veins (the smaller veins within the calf muscles), blocking blood flow.
Coding Tips
- •Distinguish calf muscular veins from the larger tibial and peroneal veins; documentation should specify 'muscular' or 'intramuscular'
- •Confirm right-sided location is documented before coding
Clinical Significance
Acute calf muscular vein thrombosis (soleal or gastrocnemius vein thrombosis) is a distal deep vein thrombosis within the intramuscular veins of the calf. While considered lower risk than proximal deep vein thrombosis, these clots can extend to larger veins and cause pulmonary embolism if untreated, particularly in patients with additional risk factors. Accurate capture ensures appropriate risk adjustment and reflects the need for clinical decision-making regarding anticoagulation.
Documentation Requirements
- ✓Clinical diagnosis of venous thrombosis or thrombophlebitis clearly documented by the treating provider
- ✓Diagnostic confirmation via duplex ultrasonography, CT venography, MR venography, or venography with imaging findings described
- ✓Current treatment plan including anticoagulation regimen with specific medication, dose, and duration
- ✓Documentation of acute onset with date of symptom onset or diagnosis establishing the acute nature
- ✓Laterality (right or left) clearly specified in provider documentation
- ✓Assessment of risk factors (immobility, recent surgery, malignancy, hypercoagulable state, oral contraceptive use)
Commonly Confused Codes
I82.441-I82.449 — Tibial vein thrombosis; tibial veins are the main deep veins, not intramuscularI82.451-I82.459 — Peroneal vein thrombosis; peroneal veins are separate from intramuscular calf veinsI80.25x — Phlebitis and thrombophlebitis of calf muscular vein; use when inflammatory component is documentedI82.431-I82.439 — Popliteal vein thrombosis; popliteal is a proximal vein behind the kneeI82.561-I82.569 — Chronic calf muscular vein thrombosis; verify acute vs. chronic nature
Code Hierarchy
└I82Other venous embolism and thrombosis└I82.4Acute embolism and thrombosis of deep veins of lower extremity└I82.46Acute embolism and thrombosis of calf muscular vein└I82.461Acute embolism and thrombosis of right calf muscular vein
└I82.461Acute embolism and thrombosis of right calf muscular vein