CPT® Code 67320

Add-On Code

Transposition procedure (eg, for paretic extraocular muscle), any extraocular muscle (specify) (List separately in addition to code for primary procedure)

Transposition of the extraocular muscles is a surgical procedure that involves the detachment and repositioning of an extraocular muscle to a new location on the eye globe. This procedure is specifically indicated for cases where there is paralysis or paresis of an extraocular muscle, which can occur due to damage to the cranial nerves responsible for eye movement, namely cranial nerves III (oculomotor), IV (trochlear), or VI (abducens). The transposition procedure is typically performed in conjunction with another strabismus surgery that is separately reportable, meaning it is billed in addition to the primary procedure. The surgical approach begins with a conjunctival incision made over the muscle or muscles that are to be manipulated. Following the incision, the targeted muscle(s) is carefully detached from its original attachment on the globe, repositioned to a new location, and then secured in place using sutures. Finally, the conjunctival incision is closed, completing the procedure. This surgical intervention aims to improve ocular alignment and restore function in patients with specific types of strabismus related to muscle dysfunction.