Strain unsp musc/fasc/tend at shldr/up arm, left arm, init

This code signifies a muscle, fascia, or tendon injury in the left shoulder or upper arm that is characterized by overstretching or tearing, but the specific muscle or tendon involved is not documented. It indicates the initial presentation or active treatment phase of such an injury.

Apply this code when a patient presents with a new, acute strain to the left shoulder or upper arm, and the provider's documentation does not specify the exact muscle, fascia, or tendon affected. This is appropriate for the initial evaluation and management of the injury.

• Ensure the documentation clearly indicates the left arm and the initial encounter for treatment.
• Avoid using this code if a more specific muscle or tendon strain (e.g., rotator cuff strain) is documented.
• If the encounter is for follow-up care after the initial treatment, a subsequent encounter code should be used.