AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2021 Issue 3; Ask the Editor

Elbow Amputation and Targeted Muscle Reinnervation

The patient, who had previously undergone left above elbow amputation due to necrosis and dysvascularity of the arm, presented for targeted muscle reinnervation surgery. During surgery, the median ulnar nerves, radial nerves, and antebrachial cutaneous nerves were identified and mobilized. An adipofascial flap was raised for interposition and the biceps was divided. The left antebrachial cutaneous nerve was neurolysed down to the head of the triceps. The median ulnar nerve, medial antebranchal cutaneous nerve, and lateral antebrachial cutaneous nerve were neurolysed and mobilized. The median nerve was used as the recipient branch to the medial head of the biceps and coapted with sutures. The medial antebrachial cutaneous nerve was sutured directly into the medial head of the biceps muscle. The ulnar nerve was sutured into the brachialis muscle. The lateral antebrachial cutaneous nerve was directly coapted into the brachialis muscle. The radial nerve was utilized to innervate the lateral head of the triceps and directly coapted. The adipofascial flap was then sutured between the two heads of the biceps. What are the correct root operations and codes for targeted muscle reinnervation (TMR)? ...

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