Subluxation of MCP joint of left thumb, sequela

This code signifies a partial dislocation of the joint connecting the metacarpal bone to the phalanx of the left thumb, specifically as a long-term effect or complication of an initial injury. It indicates that the joint surfaces are no longer in proper alignment, but remain in partial contact, affecting the left thumb's function and stability.

Use this code when documenting a patient presenting with ongoing symptoms, functional limitations, or anatomical changes in the left thumb's metacarpophalangeal joint that are directly attributable to a previously sustained subluxation. This applies to chronic pain, instability, or degenerative changes resulting from the initial injury.

• Ensure documentation clearly links the current subluxation to a past injury, justifying the "sequela" seventh character.
• Do not use this code for an acute or initial subluxation; a different seventh character would be required for the initial encounter.
• Consider additional codes for any associated conditions, such as osteoarthritis or chronic pain, if documented.