Key Takeaways
- The same procedure can cost 3 to 10 times more at a hospital outpatient department than at an ambulatory surgery center or retail clinic.
- Site-of-care programs redirect care to lower-cost, equally safe settings without reducing quality.
- The biggest opportunities are outpatient surgery, infusion therapy, imaging, and lab work.
- Financial incentives — lower deductibles, waived copays — are the most effective tool for driving employee behavior change.
- Site-of-care steerage requires employee education and navigation support to succeed.
The Site-of-Care Problem
Where a service is performed matters as much as what service is performed. A knee MRI at a hospital outpatient imaging center might cost your plan $2,200. The same MRI at a freestanding imaging center costs $400. An infusion that runs $15,000 per treatment at a hospital outpatient infusion suite can be administered at home for $4,000. The clinical outcome is identical. The cost is not.
This price disparity exists because hospitals charge facility fees on top of professional fees for services performed in their outpatient departments. Freestanding facilities — ambulatory surgery centers, independent imaging centers, retail clinics, home infusion providers — do not have the same cost structure and cannot charge facility fees.
Hospital outpatient departments charge an average of 2.5 to 3.5 times more than ambulatory surgery centers for the same procedures. For infusion therapy, the differential can reach 5 to 10 times. Site-of-care is one of the highest-ROI cost-containment programs available.
High-Opportunity Service Categories
Not every service has a meaningful site-of-care alternative. Focus your program on the categories where the cost differential is largest and the clinical risk of moving care is lowest.
| Service Category | Hospital Setting | Alternative Setting | Typical Savings |
|---|---|---|---|
| Outpatient surgery | Hospital outpatient OR | Ambulatory surgery center (ASC) | 40–60% |
| Infusion therapy | Hospital infusion suite | Home infusion or infusion center | 50–80% |
| Imaging (MRI, CT, PET) | Hospital radiology | Freestanding imaging center | 50–70% |
| Lab work | Hospital lab | Independent lab (Quest, LabCorp) | 30–60% |
| Low-acuity urgent care | Hospital ER | Retail clinic or urgent care center | 60–80% |
| Specialty infusion (biologics) | Hospital outpatient | Specialty pharmacy home delivery | 40–70% |
How Site-of-Care Programs Work
A site-of-care program has three components: identification, steerage, and incentives.
- 1Identification: Claims data analysis identifies which services are being performed in high-cost settings and which employees are candidates for redirection.
- 2Steerage: A navigation vendor, concierge service, or care coordinator contacts the employee before the service is performed and helps them find a lower-cost alternative setting.
- 3Incentives: The plan design rewards employees who use the preferred setting with reduced or waived cost-sharing.
The timing of intervention is critical. Site-of-care steerage must happen before the service is scheduled — ideally at the point of referral or prescription. Retroactive steerage (after the service is already booked) has much lower success rates.
Partner with a navigation vendor that integrates with your TPA's prior authorization workflow. When a prior auth is requested for an outpatient procedure, that is the ideal moment to present the employee with an ASC alternative and a financial incentive to switch.
Ambulatory Surgery Centers: The Biggest Opportunity
Ambulatory surgery centers (ASCs) perform the same outpatient procedures as hospital outpatient departments — orthopedic, ophthalmologic, gastrointestinal, and general surgery — at dramatically lower cost. ASCs are accredited, physician-owned facilities with strong quality and safety records. For most elective outpatient procedures, they are the clinically equivalent, lower-cost choice.
- ASCs perform over 23 million procedures annually in the US with complication rates comparable to hospital outpatient settings.
- Medicare pays ASCs roughly 55% of what it pays hospital outpatient departments for the same procedures.
- Common ASC procedures: cataract surgery, colonoscopy, knee and shoulder arthroscopy, carpal tunnel release, hernia repair.
- Employees often prefer ASCs for shorter wait times, more personalized care, and faster discharge.
Not all procedures are appropriate for an ASC setting. Complex cases, patients with significant comorbidities, and procedures requiring overnight observation should remain in a hospital setting. Your navigation vendor should have clinical criteria for appropriate case selection.
Home Infusion: The Highest-Savings Opportunity
Infusion therapy — biologics, immunoglobulins, chemotherapy, and other specialty drugs administered intravenously — is one of the fastest-growing cost categories for self-funded plans. Hospital outpatient infusion suites are the most expensive setting for these treatments. Home infusion and specialty infusion centers offer the same clinical outcomes at a fraction of the cost.
- Home infusion is appropriate for stable patients on established therapies — not for first infusions or patients with complex monitoring needs.
- A specialty pharmacy with home infusion capabilities can coordinate the drug, nursing, and supplies in a single program.
- Savings on a single biologic infusion can exceed $10,000 per treatment when moved from hospital outpatient to home.
- Ensure your SPD and plan document explicitly cover home infusion as a covered benefit — some legacy plan documents do not.
Designing the Incentive Structure
Financial incentives are the most reliable driver of site-of-care behavior change. The incentive must be large enough to be meaningful to the employee and visible enough that they know about it before making a decision.
- Waive the deductible and copay entirely for services performed at preferred ASCs or imaging centers.
- Apply the full deductible and a higher coinsurance rate for the same services at hospital outpatient departments.
- For infusion therapy, consider a shared savings model — the employee receives a cash payment or gift card when they choose home infusion over hospital infusion.
- Communicate the dollar difference explicitly: "This MRI costs you $0 at ABC Imaging Center and $450 at General Hospital."
The most effective site-of-care incentive programs make the preferred setting the path of least resistance — zero cost-sharing, easy scheduling, and a concierge to handle the logistics. Remove every barrier between the employee and the lower-cost option.
Your Action Steps
- 1Pull a claims analysis segmented by place of service code — identify what percentage of outpatient surgery, imaging, and infusion is occurring in hospital outpatient settings.
- 2Calculate the cost differential for your top 5 outpatient procedure codes between hospital and ASC settings.
- 3Identify whether your current plan design has any financial incentive for employees to choose ASCs or freestanding imaging over hospital outpatient.
- 4Evaluate navigation vendors that integrate with your TPA's prior authorization workflow for real-time steerage.
- 5Review your SPD to confirm home infusion is explicitly covered as a benefit.
- 6Design a pilot site-of-care program for your highest-volume outpatient procedure category with a clear incentive structure and a 12-month savings target.
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