Nondisp fx of base of unsp MC bone, subs for fx w delay heal

This code signifies a fracture of the base of an unspecified metacarpal bone that is not displaced. It is used when the patient is in a subsequent encounter for the fracture, and there is documented evidence of delayed healing. This indicates the fracture is not progressing as expected through the normal healing stages.

Apply this code for follow-up visits where a patient with a previously diagnosed nondisplaced metacarpal base fracture is experiencing delayed union. This would typically be after initial treatment, and the physician notes indicate the fracture site is not showing expected signs of callus formation or bridging.

• Ensure documentation clearly specifies "delayed healing" for this specific fracture site.
• Verify the fracture is indeed nondisplaced and located at the base of a metacarpal.
• This code is for subsequent encounters; an initial encounter would use a different code.