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CPT 27278: Unilateral Minimally Invasive Sacroiliac Joint Fusion
CPT code 27278 designates a unilateral sacroiliac (SI) joint fusion performed via a percutaneous or minimally invasive approach with intra–articular implants placed inside the joint and with image guidance. This code captures a growing category of minimally invasive spinal and pelvic fixation procedures aimed at stabilizing the SI joint to treat pain and dysfunction. Nationally, SI joint fusion codes are important for tracking utilization of image-guided implant-based interventions that can shift care to outpatient surgical settings.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical service represented by the code, the typical sites of service, and the common procedural context. The publication summarizes coverage and coding considerations across major payers, highlights typical modifier usage patterns, and outlines benchmarks and policy updates relevant to adoption of minimally invasive SI joint fusion. Clinical context about the procedure’s intent and technical approach is provided to support accurate coding and claims submission.
This national-level overview helps coding professionals, clinical leaders, and billing stakeholders understand where CPT code 27278 fits within spine and pelvic surgery coding, what settings the service is commonly performed in, and which major payers are relevant for coverage and reimbursement review.
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Billing Code Overview
CPT code 27278 describes a sacroiliac (SI) joint fusion performed using a percutaneous or minimally invasive approach. The service involves placement of one or more intra–articular devices positioned inside the SI joint space without breaching the cortical bone. The procedure is unilateral (one side) and includes image guidance.
Service type: Surgical implant procedure (minimally invasive sacroiliac joint fusion)
Typical site of service: Hospital outpatient department or ambulatory surgery center, reflecting a procedure-based service performed in an operative setting.
National Reimbursement Benchmarks
Commercial means vary widely around Medicare: Medicare’s mean of $14,415.20 sits between BUCA’s average commercial mean of $6,567.60 and several commercial payers with higher means such as UnitedHealth Group at $14,364.60 and Cigna at $8,837.10; Medicare’s mean is closest to UnitedHealth Group by value. This places Medicare near the upper-middle of the national spectrum rather than at either extreme, while BUCA reflects a lower commercial-average benchmark.
Dispersion (P75–P25) highlights different market tightness: Blue Cross Blue Shield’s interquartile spread is $5,759.70, UnitedHealth Group’s spread is $20,552.00, and Cigna’s spread is $15,660.00. Aetna’s spread is $9,171.50 and BUCA’s spread is $9,733.00. The tightest IQR is Blue Cross Blue Shield, and the widest is UnitedHealth Group, indicating Blue Cross Blue Shield prices cluster more tightly around its median while UnitedHealth Group shows the largest middle-50% variability.