I82.B29
BillableChronic embolism and thrombosis of unspecified subclavian 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 chronic blood clot in the subclavian vein (a major vein near the shoulder) that has been present for an extended period.
Coding Tips
- •Verify documentation specifies 'chronic' status; acute thrombosis uses different codes
- •Confirm the subclavian vein location and that it is unspecified (not right or left)
Clinical Significance
Chronic subclavian vein thrombosis indicates a long-standing vascular condition with persistent clot burden, reflecting ongoing risk for post-thrombotic syndrome, recurrent thromboembolism, and venous insufficiency. This diagnosis captures the sustained complexity of the patient's vascular disease and the need for long-term anticoagulation management, which is important for accurate risk adjustment.
Documentation Requirements
- ✓Provider documentation explicitly stating chronic 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
- ✓Duration or timeline establishing chronicity (e.g., 'long-standing,' 'diagnosed 6 months ago')
- ✓Evidence of ongoing monitoring or follow-up imaging confirming persistent thrombus
Commonly Confused Codes
I82.B19 — Acute (not chronic) embolism and thrombosis of the unspecified subclavian vein; use when newly formedI82.A29 — Chronic embolism and thrombosis of the unspecified axillary vein; different vessel, more distalI82.C29 — Chronic embolism and thrombosis of the unspecified internal jugular vein; different vessel in neckAlways 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.B2Chronic embolism and thrombosis of subclavian vein└I82.B29Chronic embolism and thrombosis of unspecified subclavian vein
└I82.B29Chronic embolism and thrombosis of unspecified subclavian vein