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5313 – Group XIII – Function: Extension of hip and flexion of knee

Note (1): When evaluating any claim involving muscle injuries resulting in loss of use of any extremity or loss of use of both buttocks (diagnostic code 5317, Muscle Group XVII), refer to § 3.350 of this chapter to determine whether the veteran may be entitled to special monthly compensation.

Note (2): Ratings of slight, moderate, moderately severe, or severe for diagnostic codes 5301 through 5323 will be determined based upon the criteria contained in § 4.56.

Rating Criteria Rating
5313 Group XIII. Function: 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.
Posterior thigh group, Hamstring complex of 2-joint muscles: (1) Biceps femoris;
(2) semimembranosus; (3) semitendinosus
Severe 40
Moderately Severe 30
Moderate 10
Slight 0