Deep Vein Thrombosis / Chronic Venous Insufficiency is rated by the U.S. Department of Veterans Affairs under DC 7121 of 38 CFR § 4.104, DC 7121 across 5 severity tiers (0% / 10% / 30% / 60% / 100%). Service connection requires (1) a current diagnosis, (2) an in-service event, injury, or exposure, and (3) a medical nexus opinion linking the two under 38 C.F.R. § 3.303.
Blood clot in a deep vein (usually legs) that can lead to chronic venous insufficiency with persistent swelling, pain, skin changes, and ulceration. Post-thrombotic syndrome develops in many DVT patients. Recurrent DVT indicates underlying clotting disorder.
Rating criteria reference 38 C.F.R. Part 4 (Schedule for Rating Disabilities). This entry has not yet undergone editorial review against the live regulation text — consult the authoritative source directly before relying on the criteria shown.