Diagnostic Code 5309 · 38 CFR §4.73
Muscle Group IX includes the intrinsic muscles of the forearm that control fine movements of the hand. This group encompasses the muscles responsible for gripping and adjusting hand position, including the pronator and supinator muscles that rotate the forearm. These muscles allow you to turn a doorknob, use a screwdriver, and rotate your hand between palm-up and palm-down positions. Military injuries from forearm wounds, crush injuries, or fractures can damage these muscles.
| Rating | Criteria |
|---|---|
| 0% | |
| 10% | |
| 20% | |
| 30% |
Service records documenting the forearm muscle injury, Treatment records including surgical repairs, Forearm rotation measurements (pronation and supination), Functional testing of fine hand movements, Statements describing difficulty with rotation tasks like turning knobs or using tools