Unsp inj extn/abdr musc/fasc/tend of thmb at forarm lv, subs

This code signifies an injury to the extensor or abductor muscles, fascia, or tendons of the thumb, located at the forearm level. The specific nature of the injury (e.g., strain, tear) is not documented, and the affected thumb (left or right) is also unspecified. This particular code is used for follow-up care after the initial treatment of such an injury.

Apply this code when a patient presents for subsequent care (e.g., physical therapy, follow-up examination, medication refill) for an unspecific injury to the thumb's extensor or abductor structures at the forearm. This is appropriate when the initial injury has already been treated and the encounter is for ongoing management.

• Ensure documentation clearly indicates a subsequent encounter for the injury.
• Avoid using this code if the specific muscle, tendon, or fascia involved is known; instead, use a more specific code.
• If the laterality (left or right thumb) is documented, a more specific code should be selected.