Oth fx first MC bone, left hand, subs for fx w delay heal

This code signifies a fracture of the first metacarpal bone (thumb) in the left hand, excluding Bennett's or Rolando's fractures. The "subsequent encounter" indicates the patient is receiving follow-up care for this fracture, and "delayed healing" specifies that the bone is not mending at the expected rate.

Use this code when documenting an outpatient visit or inpatient stay for a patient with a left first metacarpal fracture (other than Bennett's or Rolando's) who is experiencing delayed union. This applies to situations where the fracture has not healed within the typical timeframe and requires ongoing management.

• Ensure documentation clearly specifies "left hand" and "first metacarpal" to differentiate from other hand bones or laterality.
• Verify that the encounter is indeed "subsequent" and not an initial treatment for the fracture.
• Look for explicit physician documentation of "delayed healing" or similar terminology to support this specific seventh character.