HCPCS Level II code S2351 represents an add-on billing entry for an anterior lumbar diskectomy with decompression of the spinal cord and/or nerve root(s), including osteophytectomy, billed for each additional interspace beyond the primary procedure. This code is relevant to hospitals, ambulatory surgery centers, spine surgeons, and payers managing coverage and payment for complex lumbar decompression procedures. Nationally, lumbar spine surgeries constitute a significant portion of spine procedural volume and spending; accurate use of add-on codes like S2351 affects claim adjudication, bundling decisions, and payment accuracy.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise outline of the clinical procedure and typical sites of service, an explanation of where S2351 fits relative to the primary anterior diskectomy code, and the practical implications for billing and coding workflows. The publication also highlights benchmarks and policy-relevant topics readers should expect: coding hierarchy for primary versus additional interspaces, common billing modifiers and their roles (listed separately), and payer-specific program considerations where available.

Data not available in the input: associated taxonomies, ICD-10 diagnoses, related codes, and service-line financial benchmarks are not provided in the source content.