CPT® Code 20930

Add-On Code

Allograft, morselized, or placement of osteopromotive material, for spine surgery only (List separately in addition to code for primary procedure)

The CPT® Code 20930 refers to the procedure involving the placement of an allograft, specifically morselized bone or osteopromotive material, during spine surgery. An allograft is a type of bone graft that utilizes donor bone, typically sourced from a cadaver, to aid in the healing and regeneration of bone tissue. Unlike autografts, which use the patient's own bone, allografts do not contain osteoblasts, the cells responsible for bone formation, or bone morphogenic proteins, which are essential for bone growth. Instead, the allograft serves as a calcium scaffold, providing a structure upon which new bone can develop through a process known as bone conduction. Osteopromotive materials, on the other hand, are designed to actively promote bone growth. These materials may be referred to as osteoinductive because they contain osteogenic proteins, which are natural growth factors that stimulate the formation of new bone. A notable example of such a material is bone morphogenic proteins (BMP), which facilitate the differentiation of mesenchymal cells into chondroblasts and osteoblasts, thereby enhancing the bone healing process. BMP is often combined with an absorbable collagen sponge and implanted into the bone defect to encourage new bone formation. Other osteopromotive materials may include autogenous growth factor concentrate, bovine-derived osteoconductive protein, and recombinant human MP52. When reporting the placement of a morselized bone allograft, which consists of donor bone that has been crushed into small pieces, or the placement of osteopromotive material in a bone defect, the appropriate code to use is 20930. It is important to note that this code is used in conjunction with the primary procedure code for spine surgery, as it is listed separately to indicate the additional service provided. For cases involving the placement of a structural bone allograft, which is an intact piece of donor bone shaped to fit the defect, the code 20931 should be utilized instead.