Strain of unsp musc/fasc/tend at wrs/hnd lv, left hand, init

This code signifies a non-traumatic injury to an unspecified muscle, fascia, or tendon in the left wrist or hand, resulting in a strain. It indicates an overstretching or tearing of these soft tissues without a specific muscle or tendon being identified. This is the initial encounter for this specific injury.

Use this code when a patient presents with a new, acute strain to the left wrist or hand, and the specific muscle, fascia, or tendon involved is not documented or cannot be determined. This is appropriate for injuries like a general wrist sprain or hand strain where the exact anatomical structure is not specified.

• Ensure documentation clearly states "left hand" and "initial encounter."
• Only use this code when a more specific muscle or tendon strain code (e.g., S66.112A for flexor muscle strain) cannot be assigned due to lack of specificity in the medical record.
• If the encounter is for follow-up care, use the appropriate subsequent encounter (D) or sequela (S) seventh character.