CPT code 27050 denotes an open surgical biopsy of the sacroiliac joint, where a provider makes an incision at the spine–pelvis junction to obtain soft tissue for diagnostic evaluation. The code captures a targeted invasive diagnostic procedure used in cases of suspected infection, inflammatory disease, malignancy, or unexplained sacroiliac pathology. Nationally, accurate coding for this procedure affects clinical documentation, pathology follow-up, and payment for operative services involving pelvic and spinal regions.

Key payers addressed in this profile include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and service setting, typical sites of service, and common billing considerations associated with CPT code 27050. The publication summarizes benchmarks and policy-relevant elements that influence coverage and claim adjudication, highlights coding nuances tied to surgical biopsy services, and outlines areas where payers commonly require documentation to support medical necessity.

This resource is designed for coding professionals, surgical teams, and policy analysts seeking a clear, national-level summary of CPT code 27050, its clinical role, and the payer landscape relevant to sacroiliac joint open biopsy procedures.