Unsp inj musc/fasc/tend at shldr/up arm, unsp arm, sequela

This code signifies a long-term or late-effect complication stemming from an unspecified injury to muscles, fascia, or tendons in the shoulder or upper arm region. The specific muscle, fascia, or tendon involved is not documented, nor is the affected arm specified. This diagnosis indicates that the initial injury has resolved, but residual symptoms or conditions persist.

Apply this code when documentation clearly indicates a sequela (e.g., chronic pain, stiffness, weakness, limited range of motion) resulting from a past, unspecified injury to the shoulder or upper arm musculature or connective tissue. This is appropriate when the original injury is no longer acute and the specific anatomical structure or side is not detailed.

• Only use this code for sequelae; do not use for acute or initial injury encounters.
• Prioritize more specific codes if the injured structure (e.g., biceps, deltoid) or affected arm (left/right) is documented.
• Always assign an external cause code (V00-Y99) to describe the circumstances of the original injury, if known.