Strain long flexor musc/fasc/tend l thm at wrs/hnd lv, subs

This code signifies a non-traumatic injury to the long flexor muscle, its surrounding fascia, and its tendon specifically located in the left thumb, at the wrist or hand level. It indicates a stretching or tearing of these tissues, but not a complete rupture. The "D" suffix specifies that this is a subsequent encounter for care after the initial treatment phase, such as during follow-up appointments or rehabilitation.

This code is appropriate for documenting follow-up care for a patient who previously sustained a strain of the long flexor structures of the left thumb. This includes visits for physical therapy, re-evaluation of symptoms, or monitoring of healing progress after the initial injury. It should be used when the patient is receiving routine care during the healing phase, not for the initial diagnosis or for complications.

• Ensure documentation clearly specifies the left thumb and the long flexor structures.
• Verify that the encounter is indeed subsequent care, not an initial injury presentation or a sequela.
• Distinguish between a strain (stretching/partial tear) and a complete rupture, as different codes apply.