Diagnostic Code 5021 · 38 CFR §4.71a
Myositis is inflammation of the muscles that causes weakness, swelling, and pain. It can be caused by autoimmune disorders such as polymyositis and dermatomyositis, infections, medications, or injury. The primary symptom is progressive muscle weakness, typically affecting the muscles closest to the trunk of your body such as the hips, thighs, shoulders, and upper arms. This makes it difficult to climb stairs, rise from chairs, lift objects overhead, and perform other strength-dependent tasks. Veterans may develop myositis from autoimmune reactions triggered during service, infections acquired during deployment, or as a reaction to medications taken during military service.
| Rating | Criteria |
|---|---|
| 60% | |
| 30% | |
| 20% | |
| 10% | |
| 0% |
Blood work showing elevated creatine kinase and other muscle enzymes, Muscle biopsy results if performed, Electromyography showing a myopathic pattern, MRI of muscles showing inflammation, Strength testing documented by a physician