Injury of ulnar nerve at forearm level, right arm, sequela

This code signifies a long-term or residual effect resulting from a past injury to the ulnar nerve in the right forearm. This could manifest as persistent weakness, numbness, tingling, or pain in the distribution of the ulnar nerve, such as the little finger and part of the ring finger, and intrinsic hand muscles. The original acute injury has resolved, but its lasting impact on nerve function remains.

Apply this code when documenting a patient presenting with ongoing neurological deficits directly attributable to a previously sustained ulnar nerve injury in the right forearm. This is appropriate for follow-up visits addressing chronic symptoms like claw hand deformity, muscle atrophy, or sensory loss that are a direct consequence of the initial trauma. Do not use for acute injuries.

• Ensure documentation clearly states the condition is a sequela, indicating a residual effect of a past injury.
• Always use with an additional code to specify the nature of the sequela, such as muscle weakness (e.g., R27.8) or sensory disturbance (e.g., R20.2).
• Verify the laterality (right arm) and anatomical site (forearm level) are explicitly documented to support this specific code.