Subscapularis (muscle) sprain

This code signifies a sprain or tear of the subscapularis muscle, one of the four rotator cuff muscles located on the anterior aspect of the shoulder blade. It typically results from an acute injury involving forceful internal rotation or abduction of the arm, leading to stretching or tearing of the muscle fibers.

Apply this code when documentation clearly indicates a sprain or strain of the subscapularis muscle. This often occurs in sports injuries, falls, or other traumatic events affecting the shoulder. Supporting documentation should include a physical examination noting pain with specific movements, and potentially imaging findings (e.g., MRI) confirming the muscle involvement.

• Differentiate from other rotator cuff injuries; this code is specific to the subscapularis.
• Ensure the documentation specifies "sprain" or "strain" of the muscle, not a tendon.
• Consider an external cause code (E-code) to describe the circumstances of the injury, if applicable.