Subluxation of MCP joint of unsp finger, subs

This code signifies a partial dislocation of the joint connecting a metacarpal bone in the hand to a phalanx bone in an unspecified finger. The joint surfaces are no longer perfectly aligned, but remain in contact. This specific code is used when the patient is receiving follow-up care for this injury after the initial treatment.

Apply this code for patients presenting for ongoing management, such as physical therapy, cast changes, or follow-up evaluations, for a previously diagnosed metacarpophalangeal joint subluxation of an unspecified finger. This indicates that the initial active treatment phase has concluded, and the patient is in the healing or recovery stage.

• Ensure documentation clearly states "subluxation" and not a complete "dislocation" (which would be a different code series).
• Verify that the encounter is for subsequent care, not the initial treatment of the injury.
• If the specific finger (e.g., index, middle) is documented, a more specific code from the S63.21- series should be used.