Group XIII.Extension of hip and flexion of knee; outward and inward rotation of flexed knee; acting with rectus femoris and sartorius (see XIV, 1, 2) synchronizing simultaneous flexion of hip and knee and extension of hip and knee by belt-over-pulley action at knee joint.(1) Biceps femoris; (2) semimembranosus; (3) semitendinosus Function: Posterior thigh group, Hamstring complex of 2-joint muscles — VA Rating Criteria (38 CFR DC 5313)

The VA rates Group XIII.Extension of hip and flexion of knee; outward and inward rotation of flexed knee; acting with rectus femoris and sartorius (see XIV, 1, 2) synchronizing simultaneous flexion of hip and knee and extension of hip and knee by belt-over-pulley action at knee joint.(1) Biceps femoris; (2) semimembranosus; (3) semitendinosus Function: Posterior thigh group, Hamstring complex of 2-joint muscles under Diagnostic Code 5313 at the following tiers: 0%, 10%, 30%, 40%. The minimum 0% rating requires: Slight. The maximum 40% rating requires: Severe.

Diagnostic Code 5313 is the VA rating identifier for Group XIII.Extension of hip and flexion of knee; outward and inward rotation of flexed knee; acting with rectus femoris and sartorius (see XIV, 1, 2) synchronizing simultaneous flexion of hip and knee and extension of hip and knee by belt-over-pulley action at knee joint.(1) Biceps femoris; (2) semimembranosus; (3) semitendinosus Function: Posterior thigh group, Hamstring complex of 2-joint muscles within 38 CFR 38 CFR § 4.73. It defines the specific symptom criteria and percentage thresholds a VA adjudicator uses to assign a disability rating. The diagnostic code is listed on a veteran's rating decision letter.

The highest schedular rating for Group XIII.Extension of hip and flexion of knee; outward and inward rotation of flexed knee; acting with rectus femoris and sartorius (see XIV, 1, 2) synchronizing simultaneous flexion of hip and knee and extension of hip and knee by belt-over-pulley action at knee joint.(1) Biceps femoris; (2) semimembranosus; (3) semitendinosus Function: Posterior thigh group, Hamstring complex of 2-joint muscles under DC 5313 is 40%. This tier requires: Severe. Veterans who cannot secure substantially gainful employment due to Group XIII.Extension of hip and flexion of knee; outward and inward rotation of flexed knee; acting with rectus femoris and sartorius (see XIV, 1, 2) synchronizing simultaneous flexion of hip and knee and extension of hip and knee by belt-over-pulley action at knee joint.(1) Biceps femoris; (2) semimembranosus; (3) semitendinosus Function: Posterior thigh group, Hamstring complex of 2-joint muscles alone or in combination with other service-connected conditions may also qualify for TDIU at the 100% compensation rate under 38 CFR § 4.16.

Group XIII.Extension of hip and flexion of knee; outward and inward rotation of flexed knee; acting with rectus femoris and sartorius (see XIV, 1, 2) synchronizing simultaneous flexion of hip and knee and extension of hip and knee by belt-over-pulley action at knee joint.(1) Biceps femoris; (2) semimembranosus; (3) semitendinosus Function: Posterior thigh group, Hamstring complex of 2-joint muscles is rated under 38 CFR 38 CFR § 4.73, Diagnostic Code 5313. This section is part of the Schedule for Rating Disabilities (38 CFR Part 4) and can be read in full at the eCFR website.

Secondary conditions caused or aggravated by Group XIII.Extension of hip and flexion of knee; outward and inward rotation of flexed knee; acting with rectus femoris and sartorius (see XIV, 1, 2) synchronizing simultaneous flexion of hip and knee and extension of hip and knee by belt-over-pulley action at knee joint.(1) Biceps femoris; (2) semimembranosus; (3) semitendinosus Function: Posterior thigh group, Hamstring complex of 2-joint muscles may be ratable under 38 CFR § 3.310. Veterans should work with a VSO or accredited claims agent to document the medical relationship.

Service connection for Group XIII.Extension of hip and flexion of knee; outward and inward rotation of flexed knee; acting with rectus femoris and sartorius (see XIV, 1, 2) synchronizing simultaneous flexion of hip and knee and extension of hip and knee by belt-over-pulley action at knee joint.(1) Biceps femoris; (2) semimembranosus; (3) semitendinosus Function: Posterior thigh group, Hamstring complex of 2-joint muscles requires three elements: (1) a current diagnosis of the condition, (2) an in-service event, injury, or disease that may have caused or aggravated it, and (3) a medical nexus connecting the current diagnosis to that in-service event. A nexus letter from a treating physician or independent medical examiner is the most reliable nexus evidence. C&P exam findings can also establish nexus if adequately documented.