I82.4Z9

Billable

Acute embolism and thrombosis of unspecified deep veins of unspecified distal lower extremity

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

A blood clot that suddenly forms in the deep veins of the lower leg or foot, blocking blood flow. This is a serious condition that requires immediate medical attention to prevent the clot from traveling to the lungs.

Coding Tips

•Use this code only when the specific location of the deep vein thrombosis (DVT) in the distal lower extremity cannot be determined; if the exact vein is documented (popliteal, tibial, peroneal, etc.), use a more specific code
•Verify whether the condition is acute versus chronic, as chronic DVT codes (I82.5-) have different coding requirements; this code is specifically for acute presentations

Clinical Significance

Acute deep vein thrombosis of the distal lower extremity (unspecified) is a serious vascular emergency that carries immediate risk of pulmonary embolism if the clot dislodges and travels to the lungs. This condition requires urgent anticoagulation therapy and close monitoring to prevent life-threatening complications. Accurate coding of acute deep vein thrombosis captures significant vascular disease burden for risk adjustment and signals high-acuity care needs.

Documentation Requirements

✓Provider documentation explicitly stating 'acute' deep vein thrombosis (not assumed from duration of treatment)
✓Clinical evidence supporting the diagnosis such as duplex ultrasound, venography, or other imaging results
✓Query provider for specific vein location when possible
✓Query provider for laterality (right, left, or bilateral) when not documented
✓Current treatment plan including anticoagulation therapy and duration
✓Assessment and monitoring notes demonstrating the condition is being actively managed

Commonly Confused Codes

I82.5Z9 — Chronic version of the same location; use the acute code only when the thrombosis is a new or recent event, not a long-standing condition I82.40- series — Acute deep vein thrombosis of unspecified deep veins of lower extremity (not specified as distal); use the 4Z series when documentation specifies distal location I80.2- — Phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremities; this describes inflammation of the vein wall with thrombosis, not just thrombosis alone

Code Hierarchy

└I82Other venous embolism and thrombosis └I82.4Acute embolism and thrombosis of deep veins of lower extremity └I82.4ZAcute embolism and thrombosis of unspecified deep veins of distal lower extremity └I82.4Z9Acute embolism and thrombosis of unspecified deep veins of unspecified distal lower extremity

└I82.4Z9Acute embolism and thrombosis of unspecified deep veins of unspecified distal lower extremity