Dislocation of interphalangeal joint of thmb, subs

This code signifies a dislocation of the joint between the two bones of the thumb (the proximal and distal phalanges) that occurred at some point in the past and is now being addressed again. This could involve follow-up care, rehabilitation, or management of complications related to the initial injury.

Use this code for subsequent encounters when a patient presents for ongoing treatment, physical therapy, or evaluation of a previously diagnosed interphalangeal joint dislocation of an unspecified thumb. This includes visits for cast changes, wound care, or assessment of healing progress after the initial injury.

• Ensure the documentation clearly indicates a "subsequent encounter" for the dislocation, not an initial injury.
• Verify that the dislocation is specifically of the interphalangeal joint of the thumb, not another joint or finger.
• If the laterality (left or right thumb) is documented, a more specific code should be used.