CPT Code 20999: Unlisted Procedure, Musculoskeletal System, General

Submit operative note, comparative code, and cover letter. For the complete requirements, head to the "CPT code 20999 documentation requirements" section.

Rarely. Always obtain payer authorization before billing.

Billing for bone marrow aspiration procedures in conjunction with bone grafting depends on the specific clinical context and the anatomical site involved. For bone marrow aspiration explicitly performed for bone grafting in the spine, you should use CPT code 20939 (“Bone marrow aspiration for bone grafting, spine surgery only”).

Suppose the bone marrow aspiration is performed for bone grafting in non-spinal musculoskeletal procedures. In that case, the appropriate code is 20999 (unlisted procedure, musculoskeletal system, general), as there is no dedicated CPT code for non-spinal bone marrow aspiration for grafting.