Sprain of metacarpophalangeal joint of left thumb, init

This code signifies a ligamentous injury to the joint connecting the thumb's metacarpal bone to its first phalanx on the left hand. It indicates a stretching or tearing of the joint capsule or supporting ligaments, resulting in pain, swelling, and limited range of motion.

Apply this code for a patient presenting with a newly diagnosed sprain of the left thumb's metacarpophalangeal joint, such as from a fall onto an outstretched hand or a sports-related injury. This code is appropriate for the initial visit where the injury is evaluated and treatment is initiated.

• Ensure documentation specifies the left thumb and the metacarpophalangeal joint.
• The "A" seventh character indicates an initial encounter for active treatment.
• Confirm the injury is a sprain, not a fracture or dislocation, which would require different codes.