Subluxation of distal end of left ulna, initial encounter

This diagnosis code signifies a partial dislocation of the left ulna's distal (far) end, where the joint surfaces are no longer perfectly aligned but still maintain some contact. This injury typically affects the distal radioulnar joint (DRUJ) and can result in pain, instability, and limited range of motion in the wrist.

Use this code for a patient presenting with a newly diagnosed subluxation of the distal end of their left ulna. This applies to initial evaluations, emergency department visits, or the first encounter for this specific injury. It is appropriate when the documentation clearly specifies a subluxation rather than a complete dislocation.

• Ensure documentation specifies "subluxation" and not "dislocation" for accurate code assignment.
• Verify the laterality (left) and the specific bone involved (ulna, distal end).
• Confirm this is the initial encounter for this injury; subsequent encounters will require a different seventh character.