Sprain of metacarpophalangeal joint of right thumb, init

This code signifies a sprain, or ligamentous injury, affecting the joint between the metacarpal bone and the proximal phalanx of the right thumb. This type of injury typically results from hyperextension or forceful abduction of the thumb, leading to pain, swelling, and limited range of motion at the affected joint.

Apply this code when documenting the initial treatment for a patient presenting with a sprain of the right thumb's metacarpophalangeal joint. This includes the initial evaluation, diagnosis, and management of the acute injury. Subsequent encounters for follow-up care or healing would require a different seventh character.

• Ensure documentation clearly specifies the right thumb and the metacarpophalangeal joint.
• Confirm this is the patient's first encounter for this specific injury.
• Differentiate from fractures or dislocations, which have distinct codes.