Subluxation of interphalangeal joint of left thumb, init

This code signifies a partial dislocation of the joint within the left thumb, specifically the interphalangeal joint. This means the bones forming the joint are no longer perfectly aligned but are still in contact.

Apply this code when documentation indicates a patient has sustained a subluxation of their left thumb's interphalangeal joint due to an acute injury. This is appropriate for the initial visit where the injury is diagnosed and treatment begins.

• Ensure the documentation specifies "subluxation" and not a complete "dislocation" (which would be a different code).
• Verify the laterality is explicitly "left thumb" and the specific joint is "interphalangeal."
• Confirm this is the "initial encounter" for this specific injury, as subsequent encounters would require a different seventh character.