I82.B19

Billable

Acute embolism and thrombosis of unspecified subclavian 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

A blood clot that suddenly forms in the subclavian vein (a major vein near the shoulder and collarbone) on an unspecified side of the body. This condition can restrict blood flow and requires prompt medical attention.

Coding Tips

•Verify documentation specifies 'acute' presentation; if chronicity is unclear, query the provider before coding as acute
•If laterality (left vs. right subclavian vein) is documented, use the more specific codes I82.B11 or I82.B12 instead of the unspecified code I82.B19

Clinical Significance

Acute subclavian vein thrombosis represents a significant vascular event that can lead to pulmonary embolism, post-thrombotic syndrome, and recurrent venous thromboembolism. This diagnosis is critical for risk adjustment as it reflects active vascular disease requiring anticoagulation therapy, monitoring, and potentially invasive interventions. Accurate capture ensures appropriate resource allocation for ongoing management and complication prevention.

Documentation Requirements

✓Provider documentation explicitly stating acute embolism or thrombosis of the subclavian vein
✓Laterality must be documented (unspecified side) — do not assume from context
✓Clinical findings supporting the diagnosis (e.g., swelling, pain, imaging results such as duplex ultrasound or CT venography)
✓Current treatment plan including anticoagulation therapy type, duration, and monitoring parameters
✓Date of onset or timeframe establishing the acute nature of the condition
✓Any precipitating factors (central line placement, surgery, malignancy, hypercoagulable state)

Commonly Confused Codes

I82.B29 — Chronic (not acute) embolism and thrombosis of the unspecified subclavian vein; use when the clot is long-standing I82.A19 — Acute embolism and thrombosis of the unspecified axillary vein; different vessel, more distal in the arm I82.C19 — Acute embolism and thrombosis of the unspecified internal jugular vein; different vessel in the neck Always query the provider for laterality before defaulting to the unspecified code; right or left-sided codes are preferred

Code Hierarchy

└I82Other venous embolism and thrombosis └I82.BEmbolism and thrombosis of subclavian vein └I82.B1Acute embolism and thrombosis of subclavian vein └I82.B19Acute embolism and thrombosis of unspecified subclavian vein

└I82.B19Acute embolism and thrombosis of unspecified subclavian vein