Unsp injury of musc/fasc/tend at forarm lv, left arm, subs

This code signifies a follow-up encounter for an unspecified injury affecting the muscles, fascia, or tendons in the left forearm. The nature of the specific muscle, fascia, or tendon involved, or the precise type of injury (e.g., strain, tear), is not documented.

Use this code when a patient presents for ongoing care, such as a follow-up appointment, cast change, or physical therapy, for a previously diagnosed but unspecified muscle, fascia, or tendon injury of the left forearm. This applies when the initial injury was not fully specified or when further specificity is not yet determined.

• Requires a 7th character "D" for subsequent encounter.
• Only use when the specific muscle, fascia, or tendon, and the exact injury type, are not documented.
• If the specific muscle/tendon and injury are known, use a more precise code from the S56 category.