CPT Code List - CPT CODE SEARCH - Google Repair of nonunion or malunion, tibia; with sliding graft. 27724: Musculoskeletal: Repair of nonunion or malunion, tibia; with iliac or other autograft (includes obtaining graft). 27725: Musculoskeletal: Repair of nonunion or malunion, tibia; by synostosis, with fibula, any method. 27727: Musculoskeletal: Repair of congenital pseudarthrosis[PDF] Foot and Ankle Systems Coding Reference Guide - Zimmer CPT® Code Description Arthrodesis 27870 Arthrodesis, ankle, open 28320 Repair, nonunion or malunion; tarsal bones 28415 Open treatment of calcaneal fracture, includes internal fixation, when performed osteotomy (eg, flatfoot correction) J1 5115 J8 28737 Arthrodesis, with tendon lengthening and advancement, midtarsal,