Unsp injury of deep palmar arch of left hand, subs encntr

This code signifies an unspecified injury to the deep palmar arch of the left hand, indicating a subsequent encounter for care. The injury's exact nature (e.g., sprain, strain, contusion) is not specified, but it affects the deep vascular and neural structures within the palm.

Apply this code when a patient presents for follow-up care (e.g., wound check, physical therapy, re-evaluation) of a previously diagnosed, unspecified injury to the deep palmar arch of the left hand. This is appropriate when the initial acute phase of treatment has passed, and the patient is no longer in active treatment for the acute injury.

• Ensure the encounter is truly subsequent; for initial encounters, use the "A" seventh character.
• If a more specific diagnosis (e.g., laceration, contusion) of the deep palmar arch is known, use the appropriate specific code instead.
• Always code the underlying cause of the injury (e.g., fall, assault) with an external cause code.