CPT code 20900 represents autogenous bone grafting to repair a bony defect by restoring structural integrity and natural osseous tissue. The procedure is clinically significant across surgical specialties—particularly orthopedics, trauma, and reconstructive surgery—because bone grafts are used to promote healing, restore strength, and maintain anatomical function after injury, tumor resection, or degenerative change. Nationally, accurate coding of 20900 affects clinical documentation, surgical planning, and payer coverage determinations for inpatient and ambulatory surgical settings.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of the code’s clinical context, common sites of service and donor sites, and the operational implications for billing and claims submission. The publication summarizes typical use cases for 20900, highlights common modifiers used with surgical codes (modifier list provided separately), and outlines where readers can expect variability in payer policy and coverage considerations. This resource is intended to clarify the clinical intent of CPT code 20900, support correct procedural identification, and provide a foundation for further review of payer-specific reimbursement and authorization policies.

Data not available in the input: associated taxonomies, specific ICD-10 diagnoses, related codes, and payer-specific coverage rules.