HCPCS Level II code S2118 represents metal-on-metal total hip resurfacing, encompassing both acetabular and femoral components. The code captures a distinct hip preservation surgery that differs from conventional total hip arthroplasty by capping the femoral head rather than replacing the femoral stem. Nationally, this code matters because hip resurfacing has unique clinical indications, implant considerations, and utilization patterns that affect surgical coding, device tracking, and payer coverage policies.

Key payers in this review include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical service represented by the code, typical sites of care, and the payer landscape reflected in the analysis. The publication summarizes available benchmarks and policy-relevant points, highlights clinical context for when hip resurfacing is performed, and outlines areas where coverage criteria and device-specific policies commonly influence billing and reimbursement.

The content is organized to help billing managers, clinicians, and policy analysts understand what S2118 denotes, how it differs from other hip arthroplasty codes, and what to consider when reviewing payer coverage language and utilization benchmarks. Data not available in the input are noted where applicable.