I82.A29
BillableChronic embolism and thrombosis of unspecified axillary 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 has formed and persists in an axillary vein, but the specific side (right or left) is not documented or specified.
Coding Tips
- •Use this code only when laterality cannot be determined from the medical record
- •Query the provider if possible to obtain specific right or left designation for more precise coding
Clinical Significance
Chronic axillary 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 axillary 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.A19 — Acute (not chronic) embolism and thrombosis of the unspecified axillary vein; use when the clot is newly formedI82.B29 — Chronic embolism and thrombosis of the unspecified subclavian vein; different vessel near collarboneI82.71x — Chronic deep vein thrombosis of unspecified deep veins of the upper extremity; less specific codeAlways 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.AEmbolism and thrombosis of axillary vein└I82.A2Chronic embolism and thrombosis of axillary vein└I82.A29Chronic embolism and thrombosis of unspecified axillary vein
└I82.A29Chronic embolism and thrombosis of unspecified axillary vein