Injury of ulnar nerve at upper arm level, unsp arm, sequela

This code signifies a long-term complication or late effect resulting from a past injury to the ulnar nerve in the upper arm. These sequelae can include persistent pain, numbness, tingling, weakness, or muscle atrophy in the distribution of the ulnar nerve, affecting the forearm and hand. The original injury occurred at the upper arm level, but the specific arm affected is not documented.

Apply this code when documenting a patient presenting with residual symptoms or conditions directly attributable to a previous ulnar nerve injury in the upper arm. This is appropriate for chronic conditions, deformities, or functional impairments that are a direct consequence of the initial trauma. It should be used after the acute phase of the original injury has passed.

• Always assign a sequela code (ending in "S") as a secondary diagnosis, following the code for the nature of the sequela itself (e.g., pain, numbness).
• Ensure documentation clearly links the current symptoms to a past ulnar nerve injury at the upper arm level.
• If the specific arm (left or right) is known, a more specific code should be chosen.