What is site-of-care optimization in employer health benefits?

Site-of-care optimization redirects medical services — particularly infusions, imaging, and elective procedures — from high-cost hospital outpatient settings to lower-cost alternatives such as physician offices, ambulatory surgery centers (ASCs), or home infusion. The same service can cost 60–80% less outside a hospital outpatient department. For self-funded employers, site-of-care programs are one of the highest-ROI cost-containment strategies available.

What services have the biggest site-of-care savings opportunity?

The highest-impact site-of-care opportunities are: specialty drug infusions (biologics, IVIG, chemotherapy) — hospital outpatient vs. physician office or home infusion; imaging (MRI, CT, PET scans) — hospital outpatient vs. freestanding imaging center; elective surgeries — hospital inpatient vs. ambulatory surgery center; and laboratory services — hospital lab vs. independent lab. Specialty drug infusions typically offer the largest absolute dollar savings.

How do employers implement site-of-care programs?

Implementation approaches include: benefit design incentives (lower cost-sharing at ASCs and freestanding facilities), prior authorization requirements for high-cost procedures at hospital outpatient settings, specialty pharmacy carve-out programs that redirect infusions to home or physician office, and direct contracting with ASCs and freestanding imaging centers. Many TPAs and PBMs offer site-of-care management programs as an add-on service.

What is the difference between an ambulatory surgery center and a hospital outpatient department?

An ambulatory surgery center (ASC) is a freestanding facility that performs outpatient surgical procedures. A hospital outpatient department (HOPD) is a surgical or procedure suite owned by a hospital. The same procedure at an ASC typically costs 40–60% less than at a HOPD because ASCs have lower overhead, no hospital facility fees, and more efficient operations. Medicare pays ASCs approximately 50–60% of what it pays HOPDs for the same procedures.

How much can employers save with site-of-care optimization?

Site-of-care savings vary by service mix, but employers typically save 15–30% on targeted services. For specialty drug infusions, savings of 40–60% are achievable by moving from hospital outpatient to home infusion or physician office. For imaging, freestanding centers typically cost 50–70% less than hospital outpatient. For surgical procedures, ASCs typically cost 40–60% less than HOPDs. Total plan savings depend on the volume of redirectable services.

Cost Strategy

Site-of-Care Optimization for Self-Funded Employers

The same procedure can cost 3–10× more depending on where it's performed — not because the quality is better, but because of how hospitals price services. Site-of-care optimization steers employees to lower-cost, equally effective settings without compromising care quality.

The cost variation problem

Service	Hospital outpatient	Ambulatory surgery center
Colonoscopy	$2,500–$4,000	$800–$1,500
Knee arthroscopy	$8,000–$15,000	$3,000–$6,000
Cataract surgery	$3,500–$6,000	$1,500–$2,500
MRI (knee)	$1,500–$3,000	$400–$800

Approximate ranges. Actual costs vary by market and contract.

Site-of-care strategies

Benefit design incentives: Lower cost-sharing for procedures performed at ASCs, imaging centers, or other lower-cost settings. Higher cost-sharing for hospital outpatient when a lower-cost alternative exists.

Navigation and advocacy: Proactive outreach to employees scheduled for high-cost procedures, offering to help them find a lower-cost, equally effective alternative.

Prior authorization with site guidance: When authorizing elective procedures, the utilization management team recommends the appropriate site of care and flags hospital outpatient cases that could be performed at an ASC.

Shared savings programs: Employees who choose a lower-cost site of care share in the savings — receiving a cash payment or reduced cost-sharing.

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