Summary & Overview

HCPCS S2325: Hip Core Decompression

HCPCS Level II code S2325 designates hip core decompression, a targeted surgical procedure to reduce intraosseous pressure in the femoral head often used in early-stage osteonecrosis. This procedure has national relevance because it affects orthopedic surgical practice patterns, utilization of ambulatory surgical centers and hospitals, and payment policy discussions for limb-preserving interventions.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for hip core decompression, typical sites of service, and which major payers cover or adjudicate claims for this service. The publication outlines available benchmarks where present, notes policy considerations affecting coverage and site-of-service decisions, and highlights coding and billing elements that commonly influence claims processing for surgical hip interventions.

This summary is intended to inform billing managers, coding professionals, and policy analysts about the clinical purpose of S2325, payer relevance, and the types of operational and reimbursement topics addressed in the full publication. Data not available in the input is noted where specific coverage or benchmark details are not provided.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareS2325HCPCS Level IIhip surgerycore decompressionorthopedicsambulatory surgical centeroperating roomprocedure codingbilling guidance

Billing Code Overview

HCPCS Level II code S2325 represents hip core decompression, a surgical procedure aimed at relieving intraosseous pressure in the femoral head to treat conditions such as osteonecrosis of the hip. The service type is surgical intervention of the hip. The typical site of service is an operating room or ambulatory surgical center where orthopedic procedures are performed.

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A typical patient is a 35–55-year-old adult presenting with progressive hip pain, reduced range of motion, and activity-limiting symptoms consistent with early-stage avascular necrosis (osteonecrosis) of the femoral head or focal subchondral collapse. Conservative management (activity modification, NSAIDs, physical therapy, and protected weight bearing) has failed, and imaging (plain radiographs and MRI) demonstrates a symptomatic, pre‑collapse or early‑collapse lesion amenable to joint‑preserving intervention. The orthopedic surgical workflow includes preoperative evaluation and informed consent, imaging review to localize the necrotic core, preoperative planning for core decompression (often image‑guided), performance of the procedure in an ambulatory surgery center or hospital operating room under regional or general anesthesia, intraoperative fluoroscopic confirmation of guidewire and drill placement, removal of necrotic bone (core decompression tunnel), possible adjunct biologic augmentation (bone graft or bone marrow concentrate), postoperative analgesia and thromboprophylaxis as indicated, and staged follow‑up with weight‑bearing restrictions and serial radiographs/MRI to monitor healing and progression. Typical sites of service are an outpatient ambulatory surgery center or hospital outpatient department; inpatient admission is uncommon unless comorbid conditions require observation.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required is substantially greater than usually required (document rationale).
`23`	Unusual anesthesia	Use when a procedure is performed under general anesthesia due to an unusual circumstance, per payer rules.
`26`	Professional component	Use when professional interpretation or surgeon's professional portion is billed separate from technical facility services.
`50`	Bilateral procedure	Use when core decompression is performed on both hips during the same operative session.
`51`	Multiple procedures	Use when core decompression is billed with additional distinct surgical procedures on the same day.
`52`	Reduced services	Use when the procedure is partially reduced or not completed as planned.
`53`	Discontinued procedure	Use when the procedure is started but discontinued for patient safety or intraoperative findings.
`62`	Two surgeons	Use when two surgeons of different specialties perform distinct portions of the procedure together.
`66`	Surgical team	Use when a surgical team approach is required and reported per payer policy.
`78`	Return to OR for related procedure during global period	Use when a related procedure for a complication is performed during the global period.
`80`	Assistant surgeon	Use when an assistant surgeon participates and payer allows separate assistant fees.
`81`	Minimum assistant surgeon	Use when a minimal assistant surgeon is documented and payer recognizes this modifier.
`82`	Assistant surgeon when qualified resident unavailable	Use when an assistant is used because a qualified resident is unavailable.

Taxonomy Code	Specialty	Notes
`2080S00000X`	Orthopedic Surgery	Primary specialty performing hip core decompression.
`207LH0000X`	Interventional Pain Management	May perform image‑guided percutaneous decompression in select practices.
`2086S0105X`	Sports Medicine (Orthopedic Surgery)	Subspecialists who manage early avascular necrosis in active patients.
`2084P0901X`	Physical Medicine & Rehabilitation	Often involved in preoperative optimization and postoperative rehabilitation.
`221E00000X`	Anesthesiology	Provides regional or general anesthesia services for the procedure.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`M87.051`	Idiopathic aseptic necrosis, right shoulder	Data not available in the input.
`M87.052`	Idiopathic aseptic necrosis, left shoulder	Data not available in the input.
`M87.150`	Secondary osteonecrosis, right femur	Data not available in the input.
`M87.151`	Secondary osteonecrosis, left femur	Data not available in the input.
`M87.9`	Osteonecrosis, unspecified	Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`20610`	Arthrocentesis, aspiration and/or injection; major joint or bursa (e.g., hip)	Diagnostic or therapeutic aspiration/injection performed preoperatively for symptom control or diagnostic clarification.
`20680`	Removal of implant; deep (e.g., buried wires, pins)	Performed if prior hardware in proximal femur/head must be removed before performing core decompression.
`27370`	Osteotomy, femoral; any type, proximal (including internal fixation if performed)	Alternative or adjunct joint‑preserving procedure in certain femoral deformity cases contributing to femoral head stress.
`77002`	Fluoroscopic guidance for needle placement (e.g., hip)	Image guidance commonly used intraoperatively to place guidewire and drill for core decompression.
`38220`	Bone marrow aspiration, any site, without biopsy	Performed when bone marrow concentrate is harvested intraoperatively for biologic augmentation of the decompression tract.