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Code year: FY2026 (Oct 1 2025 Sep 30 2026) Audience: Certified Coders, Auditors and Clinical Documentation Specialists Access: CCO Members Last updated: April 2026 Definition Deep vein thrombosis (DVT) is the formation of a blood clot (thrombus) within a deep vein, most commonly in the lower extremities the femoral, popliteal, iliac, tibial, or peroneal veins but also occurring in the upper extremities (brachial, radial, ulnar, axillary, subclavian, internal jugular veins) and less commonly in other sites (vena cava, renal vein, hepatic vein, cerebral sinuses)
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Clinicians may monitor complete blood counts, vitamin B12 levels, methylmalonic acid, homocysteine, potassium, or other markers depending on the situation
The most speculative