Summary & Overview
HCPCS S2115: Periacetabular Osteotomy with Internal Fixation
HCPCS Level II code S2115 represents a periacetabular osteotomy with internal fixation, an orthopedic surgical procedure to correct acetabular deformities and improve hip joint stability. This code is relevant nationally for surgeons, hospitals, and payers because it denotes a specialized reconstructive procedure with implications for operative resource use, inpatient versus outpatient settings, and durable medical equipment and implant billing. Key payers in the scope of national coverage and benchmarking include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn the clinical scope of the procedure, typical sites of service, and which major payers commonly adjudicate claims for this service. The publication summarizes billing considerations, common modifiers encountered on claims lines, and areas where policy updates and coverage nuances often arise. The content provides benchmarks and operational context relevant to revenue cycle teams and clinical leadership managing authorization, coding, and post-operative care pathways. Data not available in the input is explicitly noted where applicable, and clinical context is provided to support accurate claim submission and payer communication.
Billing Code Overview
HCPCS Level II code S2115 describes osteotomy, periacetabular, with internal fixation. This procedure involves surgical reshaping of the acetabulum (the hip socket) to improve hip joint alignment and stability, with placement of internal fixation hardware to maintain the corrected anatomy.
Service Type: Orthopedic surgical procedure
Typical Site of Service: Inpatient hospital or ambulatory surgical center, depending on case complexity and patient needs
Clinical & Coding Specifications
Clinical Context
A 24-year-old patient with symptomatic acetabular dysplasia presents with persistent lateral hip pain, early osteoarthritis changes on imaging, and hip instability despite conservative care (physical therapy, activity modification, and NSAIDs). Orthopedic evaluation includes pelvic radiographs and CT to assess acetabular orientation and femoral head coverage. After multidisciplinary discussion, the patient is scheduled for a periacetabular osteotomy with internal fixation (S2115) to reorient the acetabulum, improve femoral head coverage, and reduce joint contact pressures.
Preoperative workflow includes history and physical, medical clearance, templating of osteotomy cuts, and planning fixation (plates/screws). The procedure is performed in an operating room under general anesthesia with fluoroscopic guidance. Postoperative care includes inpatient pain control, thromboprophylaxis, weightbearing restrictions, wound checks, and outpatient physical therapy for gait training and hip strengthening. Follow-up radiographs confirm osteotomy position and hardware placement; staged hardware removal may occur months to years later if symptomatic.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work, time, or effort substantially exceeds the typical for periacetabular osteotomy and documentation supports increased complexity. |