By the VerifyDoc team
If you visited what looked like a doctor's office and then got billed twice — once from the hospital and once from the physician — you almost certainly received care at a provider-based facility, and both charges can be legitimate. But they can also be wrong, duplicated, or applied to a location that doesn't legally qualify.
This post explains what provider-based billing is, which federal rules govern it, what the hospital is required to tell you before you're billed, and — most importantly — how to check each of the two invoices for errors. We also cover the 2026 hospital price transparency rules that give you a new tool for comparison. For context on how hospitals categorize your visit type, see our related guide on Observation vs. Inpatient Admission: The Billing Difference That Can Cost You Thousands in 2026.
Have your itemized bill handy? VerifyDoc reads it line by line and flags duplicates, upcoding, unbundling and math errors. The flag count is free; the full report, with a dispute letter for each finding, is $19.
Check my bill — free preview →Quick Checklist: What to Verify When You Get Two Bills
Use this numbered list as your starting point. Each item is explained in detail below.
- Confirm the facility actually has provider-based status under 42 CFR § 413.65.
- If you're on Medicare and the clinic is off-campus, check whether you got written notice of the facility coinsurance.
- Verify that both bills don't charge for the same service line.
- Compare the facility fee against the hospital's published price transparency file.
- Check the place-of-service (POS) code on the physician claim.
- Make sure the facility fee reflects the correct Ambulatory Payment Classification (APC) rate, not an inflated charge.
- If you're Medicare-enrolled, confirm you weren't charged two separate deductibles for what is legally one encounter.
What "Provider-Based" Actually Means
A provider-based facility is a clinic, physician office, or other outpatient location that a hospital has designated as a department of the hospital for Medicare billing purposes. Provider-based status means the relationship between a main provider and a provider-based entity or a department of a provider, remote location of a hospital, or satellite facility that complies with the provisions of 42 CFR § 413.65.
There are essentially two types of physician offices: hospital outpatient clinics, where the physician offices are considered a department of the hospital, and private physician practices, which are considered suppliers. From a patient's perspective, both can look identical — the same waiting room, the same doctor, the same front-desk experience. The billing difference is dramatic.
The consequences of provider-based status are substantial. When an outpatient location qualifies as provider-based, the hospital may bill for services furnished at that location under the Medicare Outpatient Prospective Payment System (OPPS), rather than under the Medicare Physician Fee Schedule (MPFS). OPPS rates for the same E&M visit are typically higher than the physician fee schedule equivalent — which is why the two-bill pattern costs patients more than a single private-office visit would.
A facility fee is any fee a hospital or health system charges or bills for outpatient hospital services that is intended to compensate the hospital or health system for its operational expenses, separate and distinct from a professional fee charged or billed by a health care provider for professional medical services. In plain terms: one charge pays the doctor; the other pays for the exam room, staff, and equipment — even if the facility looks nothing like a traditional hospital.
The Governing Regulation and What It Requires of Hospitals
The Medicare regulation setting forth the requirements for provider-based status is 42 CFR § 413.65. To qualify as provider-based, the outpatient facility must demonstrate that it operates as an integrated component of the hospital, including by being under common ownership and control, sharing the hospital's state licensure, and achieving sufficient clinical, administrative, and financial integration with the hospital.
On-campus facilities — within 250 yards of the main hospital — must follow all rules stated under Section (d) of 42 CFR § 413.65. Off-campus facilities must adhere to Section (d) requirements as well as additional criteria listed under Section (e). The off-campus distinction matters because it affects whether the facility charge is paid at the full OPPS rate or a lower rate for sites that began billing after November 2, 2015 (the cutoff established by Section 603 of the Bipartisan Budget Act).
Critically, a 2026 federal law requires hospitals to register every off-campus hospital outpatient department with its own unique National Provider Identifier (NPI), and submit an attestation confirming compliance with the provider-based requirements at 42 CFR § 413.65 for these facilities. This requirement was enacted in 2026, in section 6225 of the Consolidated Appropriations Act, 2026, and CMS has proposed how to implement it. You can still ask the hospital which NPI that specific location bills under.
Your Right to Written Advance Notice (and What Happens When It's Missing)
Under 42 CFR § 413.65(g)(7), when a Medicare patient is treated at an off-campus hospital outpatient department, the hospital must notify the patient in writing — before services are delivered — that they will incur a hospital co-insurance liability they would not incur at a non-provider-based facility. In an emergency, the notice comes once the emergency is ruled out or the patient is stabilized. If the exact type and extent of care needed are not known, the notice must include an explanation that the beneficiary will incur a coinsurance liability to the hospital that he or she would not incur if the facility were not provider-based, an estimate based on typical or average charges for visits to the facility, and a statement that the patient's actual liability will depend upon the actual services furnished.
The notice must be one that the beneficiary can read and understand. If the beneficiary is unconscious, under great duress, or for any other reason unable to read a written notice and understand and act on his or her own rights, the notice must be provided, before the delivery of services, to the beneficiary's authorized representative.
The facility or organization seeking status as a department of a provider is held out to the public and other payers as part of the main provider. When patients enter the provider-based facility or organization, they are aware that they are entering the main provider and are billed accordingly. If you're on Medicare, the clinic is off-campus, and you weren't given this notice in writing, ask the hospital why. The rule doesn't say a missing notice makes the facility fee unlawful, but it is a fair question to raise in writing.
Some states go further. Louisiana law, for example, requires any off-campus provider-based facility to publicly post a notice to every patient disclosing that the patient is receiving services in a hospital-based outpatient facility, and that depending on the patient's health insurance benefit plan, the patient may receive a facility charge billed separately from the physician's fee. Check whether your state has a similar statute.
The Two Bills: What Each Should and Shouldn't Contain
The table below summarizes the two separate claims, what each should cover, and common errors to look for on each.
| Bill Type | Sent By | Claim Form | What It Should Cover | Common Errors to Spot |
|---|---|---|---|---|
| Facility Fee Bill | Hospital / Health System | UB-04 (institutional) | Room/space, nursing staff, supplies, equipment used during visit; billed under OPPS (42 CFR Part 419) | Duplicate service lines also on physician bill; APC code mismatch; off-campus site opened after Nov 2, 2015 billed at the full OPPS rate instead of the lower PFS-based rate |
| Professional Fee Bill | Physician / Physician Group | CMS-1500 (professional) | Physician's clinical work: evaluation, diagnosis, treatment, procedures performed | Wrong place-of-service code (should be 19 for an off-campus or 22 for an on-campus HOPD, not 11 for an office); upcoded E&M level; services billed the physician did not personally perform |
The place-of-service (POS) code on the physician's CMS-1500 claim matters because it determines the payment rate. Physician services furnished in hospital outpatient departments must be billed with the correct site-of-service so that appropriate physician and practitioner payment amounts can be determined under the rules of 42 CFR Part 414. POS 22 (On Campus–Outpatient Hospital) pays less to the physician than POS 11 (Office) — the difference in physician reimbursement is offset by the separate facility fee. If a physician bills POS 11 while the hospital bills a facility fee for the same visit, that's a billing inconsistency worth flagging. Our deeper guide on What Is Upcoding? How Hospitals Inflate Your Bill walks through how inflated code levels appear on both claim types.
Using the 2026 Price Transparency Rules to Check the Facility Fee
Starting April 1, 2026, CMS began enforcing strengthened hospital price transparency requirements. CMS began enforcing recent updates to its federal Hospital Price Transparency regulations, reflecting CMS's continued effort to transform hospital price transparency from a basic disclosure obligation into a more standardized and data-driven framework for health care pricing information.
Beginning January 1, 2026, hospitals must attest in their machine-readable file that, to the best of their knowledge and belief, they have included all applicable standard charge information in accordance with the requirements of 45 CFR § 180.50, and that the information is true, accurate, and complete. Beginning January 1, 2026, hospitals must also calculate and encode the 10th percentile allowed amount, the median allowed amount, and the 90th percentile allowed amount in dollars when a payer-specific negotiated charge is set as a percentage or algorithm.
This gives you a concrete benchmark. Find the hospital's publicly posted machine-readable file (required by 45 CFR Part 180), locate the billing code (APC or CPT) that matches the facility fee on your bill, and compare what your plan allowed (shown on your EOB) with the negotiated rate the hospital posted for your plan. Civil monetary penalties for non-compliance reach up to $2 million per hospital per year for large facilities under 45 CFR § 180.90. If your plan allowed more than the rate the hospital posted for your plan for that service, document it and use it in your dispute letter. For help reading every line of an institutional claim, see our guide on how to understand your itemized hospital bill.
Decision Tree: Should You Dispute the Facility Fee?
Illustrative Example: A Cardiology Clinic Visit (Illustrative — Not a Real Patient)
This is a constructed example for illustration purposes only. Dollar figures are hypothetical and do not represent specific patients, hospitals, or insurers.
Imagine a patient visits what appears to be a cardiologist's office in a medical building two miles from a regional hospital. Unknown to the patient, that clinic was acquired by the hospital system in 2019 and designated as an off-campus hospital outpatient department under 42 CFR § 413.65.
Three weeks after the visit, the patient receives two Explanations of Benefits (EOBs) from her insurer: one for $320 (the physician's professional fee for the visit, billed as CPT 99213) and one for $680 (a facility fee from the hospital system, billed as HCPCS G0463 with modifier PN because the clinic became an off-campus hospital department in 2019). Total billed: $1,000. Her coinsurance on the facility fee is a cost she would not have at a private office: under Medicare Part B, Medicare pays that line at a reduced, Physician Fee Schedule-based rate, and she owes 20% of that reduced rate once the deductible is met, with no annual cap.
When she checks the hospital's price transparency file (required under 45 CFR Part 180), she finds the negotiated rate the hospital posted for her plan for the G0463 facility charge is $410, but her EOB shows her plan allowed $680. She also finds no record of receiving the written notice that 42 CFR § 413.65(g)(7) requires for Medicare patients at off-campus departments. She now has one documented ground to dispute — an allowed amount above the rate posted for her plan — and a fair question to ask the hospital about the missing notice. Our post on What "Adjustments" on a Hospital Bill Really Mean in 2026 explains how the adjustment lines on your EOB connect to these disputes.
What Can't Legally Be Billed as a Facility Fee
Not every location owned by a hospital can bill facility fees at the full hospital rate. Congress took its first major swing at the site-of-service differential in 2015. Section 603 of the Bipartisan Budget Act changed how Medicare pays off-campus hospital outpatient departments that started billing after November 2, 2015. As of January 1, 2017, new off-campus outpatient departments of a provider are not paid under OPPS — they're paid instead under other applicable payment systems.
Patients at these newer off-campus locations can still get two bills: the hospital still sends a facility claim, but Medicare pays it at a lower, Physician Fee Schedule-based rate instead of the OPPS rate. Full OPPS payment continues for grandfathered (pre-November 2, 2015) sites, dedicated emergency departments, and departments on the campus of, or within 250 yards of, the main hospital or a remote location. If the clinic you visited began billing as a hospital department after November 2, 2015, and is more than 250 yards from the main hospital campus, its facility charge should be paid at that lower rate. Ask the billing office directly: "Is this location a grandfathered provider-based department under Section 603 of the Bipartisan Budget Act?" If they can't answer, request the CMS enrollment documentation.
Also note: hospital outpatient departments must treat all Medicare patients, for billing purposes, as hospital outpatients. The department must not treat some Medicare patients as hospital outpatients and others as physician office patients. If you and a friend saw the same doctor in the same clinic on the same day and one of you received a facility fee while the other didn't, that inconsistency is worth escalating. If this situation escalates to a billing dispute or collection notice, see our guide on When Can a Hospital Send You to Collections? 2026 Rules for your federal protections.
About VerifyDoc: We help patients identify errors and overcharges on medical bills. We publish guides on hospital billing, the No Surprises Act, and disputing medical charges, updated as federal and state rules change.
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Check my bill — free preview →Frequently asked questions
Is it legal for a hospital to send me two separate bills for one visit?
Yes, it can be legal — if the facility meets the strict requirements for provider-based status under 42 CFR § 413.65. If you're a Medicare patient seen at an off-campus hospital department, 42 CFR § 413.65(g)(7) also requires the hospital to give you written notice of your facility coinsurance before care (in an emergency, once you're stabilized). The facility fee covers the hospital's operational costs (space, staff, equipment) and the professional fee covers the physician's clinical work. If the facility doesn't qualify, the facility fee may be disputable; a missing notice is worth raising with the hospital in writing. "Legal" also doesn't mean the amounts are correct — both bills should be checked against the hospital's published price transparency data under 45 CFR Part 180.
What is a facility fee and why is it usually higher than a regular office visit copay?
A facility fee is a charge hospitals bill separately from the physician's professional fee at hospital outpatient departments (HOPDs). It compensates the hospital for its operational overhead — staff, equipment, space — rather than the doctor's clinical work. Because HOPDs bill under the Medicare Outpatient Prospective Payment System (OPPS, governed by 42 CFR Part 419), the payment rates and corresponding patient cost-sharing are typically higher than what applies to a private physician's office. The same clinical visit — same doctor, same procedure — costs more at a provider-based HOPD than at an independent physician office, which is why the site-of-service designation matters so much to your out-of-pocket costs.
How do I know if the clinic I visited was actually a qualifying provider-based department?
Ask the billing office directly whether the location is designated as a provider-based department under 42 CFR § 413.65, and whether it is an on-campus facility (within 250 yards of the main hospital) or a grandfathered off-campus location billing under OPPS. Under Section 603 of the Bipartisan Budget Act, off-campus HOPDs that began billing after November 2, 2015, can still send a facility charge, but Medicare pays it at a lower, Physician Fee Schedule-based rate instead of the OPPS rate. You can also look up the facility's National Provider Identifier (NPI) on the CMS NPPES registry to see how the location is enrolled and whether it carries a hospital outpatient department designation. If the billing office cannot provide clear documentation, that is itself a red flag worth escalating in writing.
If I find an error on the facility fee bill, what's my first step to dispute it?
Start by requesting an itemized bill from the hospital — not just a summary statement — and cross-reference every line against your Explanation of Benefits (EOB) from your insurer. Then look up the hospital's machine-readable price transparency file (required under 45 CFR Part 180) to find the standard charge for that specific billing code, and compare it to what you were billed. If you're on Medicare, the clinic is off-campus, and you were never given the written notice that 42 CFR § 413.65(g)(7) requires, mention that in your letter and ask the hospital to explain. Submit the dispute in writing to the hospital's billing department, copy your insurer's member services, and keep records of every communication including dates and representative names.