Hospital outpatient vs imaging center: why the same scan carries two payment logics

Two payment logics for one code

In a hospital outpatient department, Medicare pays two separate layers. The facility is paid under the Outpatient Prospective Payment System (OPPS), through an Ambulatory Payment Classification (APC); a single imaging study billed alone is paid through its own single-service APC, and a composite APC applies only when several qualifying studies are billed together. The clinician who interprets the study is paid separately under the Physician Fee Schedule (PFS), as the professional component, modifier 26. In a freestanding imaging center or a physician office, the same study is usually billed as one PFS global amount that covers both the technical component (the scanner, the technologist, the image storage) and the professional component in a single figure. Neither logic is a patient price. They are the two structures your cash quote or your insured bill will be built from, which is why a facility-only quote from a hospital and a global quote from an imaging center cannot be compared until each one states what it includes.

The anchors, side by side

Every figure below is taken from the checked-in data behind this site (src/data/procedures.json) and is printed on the matching procedure page. OPPS amounts are CY2026 national unadjusted single-service facility payment rates before wage-index adjustment, from the CMS OPPS October 2026 Addendum A and B (verified 2026-10-22); the composite rate, which applies only to multi-study claims, is shown in brackets where one exists. PFS amounts are CY2026 Physician Fee Schedule amounts for Michigan Locality 01, published by WPS GHA, effective January 1, 2026; another locality will differ. Verified 2026-10-18. The columns are shown side by side on purpose. This site never adds the layers into a total that no source published.

Procedure and CPT	Hospital outpatient: OPPS facility anchor (CY2026)	Imaging center or office: PFS global anchor (CY2026)	Professional component inside the PFS split (modifier 26)	Technical component inside the PFS split (TC)
MRI without contrast, brain - 70551	$243.77 (APC 5523) [multi-study composite $537.85]	$192.65	$69.04	$123.61
MRI without and with contrast, brain - 70553	$356.43 (APC 5572) [multi-study composite $867.08]	$312.34	$107.27	$205.07
MRI lumbar spine without contrast - 72148	$243.77 (APC 5523) [multi-study composite $537.85]	$189.10	$69.69	$119.42
MRI knee without contrast - 73721	$243.77 (APC 5523) [multi-study composite $537.85]	$200.97	$63.82	$137.14
CT abdomen and pelvis with contrast - 74177	$356.43 (APC 5572) [multi-study composite $438.90]	$294.96	$85.62	$209.34
CT head without contrast - 70450	$106.81 (APC 5522) [multi-study composite $226.07]	$105.23	$40.21	$65.03
CT chest without contrast - 71250	$106.81 (APC 5522) [multi-study composite $226.07]	$130.87	$50.38	$80.50
Ultrasound, abdomen, complete - 76700	$106.81 (APC 5522) [multi-study composite $300.57]	$112.60	$37.99	$74.61
Ultrasound, pelvis, non-obstetric - 76856	$106.81 (APC 5522) [multi-study composite $300.57]	$103.52	$33.01	$70.51
DXA bone density, axial - 77080	$106.81 (APC 5522)	$38.75	$9.50	$29.25
Sleep study, polysomnography - 95810	$877.34 (APC 5724)	$659.23	$120.89	$538.34

One pattern in the table is worth naming. Three different MRI studies, brain without contrast (70551), lumbar spine (72148), and knee (73721), carry the same $243.77 OPPS facility anchor when each is billed alone, because Addendum B assigns all three to the same single-service APC 5523. If two or more qualifying MRI studies are billed on one claim, the hospital can instead be paid the MRI and MRA without Contrast Composite APC 8007 at $537.85 (multi-study only, national unadjusted). The PFS global anchors for those three studies differ ($192.65, $189.10, and $200.97), because the Physician Fee Schedule prices each code on its own components. The two systems group the same work differently. That grouping, not the scanner, is most of the structural gap between the columns.

Inside the global figure: the two components

The last two columns are the split that explains the whole page. The CMS relative value file lists each imaging code three ways: as a global service, with modifier 26 for the professional component, and with modifier TC for the technical component. The professional component pays for the physician's work in interpreting the study and writing the report. The technical component pays for everything else: the equipment, the technologist, supplies, and the practice expense of running the scanner. Add the two and you get the global amount, to the cent or within a cent of rounding; for 70551 the $69.04 professional component and the $123.61 technical component make the $192.65 global.

The components matter because they tell you who sends which bill. When one entity, typically a freestanding center that employs or contracts the reading radiologist, bills both parts, the claim carries one global line. When the parts are split, two bills arrive: the entity that owns the scanner bills the technical component, and the radiology group bills the professional component with modifier 26. In a hospital outpatient department, Medicare pays the technical side as the hospital's OPPS facility payment in the second column, rather than as a TC line under the fee schedule. So the fair comparison across settings is the fourth column plus either the fifth (fee schedule setting) or the second (hospital), and this guide still does not add them, because the hospital column is a national rate and the components are a single locality. Read the gap between the second and fifth columns as the difference in how Medicare pays for the technical work in the two settings. In all eleven rows the hospital facility anchor is higher than the fee schedule technical component, by $26.31 for CPT 71250 up to $339.00 for CPT 95810, with the caveat that one figure is national and the other is one locality. The guide to the separate radiologist bill prices that split for 14 scan codes and says when to expect one bill and when two.

The term "imaging center" also has a specific Medicare meaning. Under 42 CFR 410.33, Medicare pays for diagnostic procedures under the fee schedule only when they are performed by a physician, a physician group, an approved portable x-ray supplier, certain nurse practitioners and clinical nurse specialists, or an independent diagnostic testing facility, known as an IDTF. The regulation describes an IDTF as independent of a physician's office or hospital, and it may be a fixed location, a mobile unit, or an individual nonphysician practitioner. Under that list, a freestanding center paid under the fee schedule bills either as a physician or group practice or as an IDTF, while a hospital department is paid under the outpatient system instead. So ask a location which it is: a hospital outpatient department, a physician practice, or an IDTF. Of those three, only the hospital department brings the OPPS facility column into play.

Contrast: a different code at the scanner, a packaged cost at the hospital

The with-contrast rows show the second structural difference. Using contrast changes the scan code itself; the contrast agent is a separate question, covered below. Brain MRI is billed as 70551 without contrast, 70552 with contrast, and 70553 without and with, and the anchors move with the code: in the hospital column, $356.43 for 70553 in APC 5572 against $243.77 for 70551 in APC 5523, a difference of $112.66; in the fee schedule column, $312.34 against $192.65, a difference of $119.69. October 2026 Addendum B places 70552 in the same APC 5572 as 70553, at the same payment.

The contrast agent itself is handled differently in the two systems. Under the outpatient payment system, the Medicare regulation at 42 CFR 419.2(b) lists contrast agents among the drugs that function as supplies in a diagnostic test, and their cost is packaged into the payment for the scan. Addendum B shows the gadolinium and iodinated contrast codes with status indicator N, packaged, with no separate payment rate. The physician fee schedule file lists the gadolinium codes checked for this guide (A9575, A9579 and A9585) with status X, which its documentation defines as a statutory exclusion, and the iodinated contrast code Q9967 with status E, excluded by regulation; for both statuses the documentation says no payment may be made under the fee schedule. Those statuses say only that the fee schedule does not price the agent. It does not say whether or how a freestanding center bills for it, which is a question to put to the center: "Is the contrast agent inside your price for this code, or billed as a separate line?"

For a hospital patient having two MRIs or two CTs the same day, contrast also changes which composite applies. The CY2026 OPPS rule says that when a hospital performs an MRI without contrast in the same session as at least one MRI with contrast, it is paid at the with-contrast composite rate, APC 8008. One contrast study moves the whole family into the with-contrast composite.

Two scans the same day: one composite payment, or a reduced second study

The bracketed composite figures in the table come into play only when a hospital bills more than one study in the same imaging family on the same date. The CY2026 OPPS final rule describes the policy, in place since 2009: a single payment each time a hospital submits a claim for more than one imaging procedure within an imaging family on the same date of service. There are three families, ultrasound, CT and CTA, and MRI and MRA, split into five composite APCs because the statute requires different payment with and without contrast. The composite rate includes packaged services on the same date. Studies across families keep their own single APCs.

The fee schedule handles the same situation another way. The relative value file's multiple procedure indicator 4 marks diagnostic imaging codes, and its documentation says that when such codes are reported in the same session on the same day, the technical components are ranked by fee schedule amount: the highest is paid at 100 percent and each later one at 50 percent. The same documentation says professional components of diagnostic imaging are subject to a 5 percent reduction, effective from January 1, 2017. In the October 2026 file, 70551 and 72148 both carry multiple procedure indicator 4 and the same diagnostic imaging family value, 88. The same-session ranking condition is written for the technical component; for the professional component the documentation states the reduction without spelling out its conditions, so the figure shows the 5 percent cut as it would apply where the reduction applies. Here is what that does to a brain MRI and a lumbar spine MRI in one session, using this site's anchors.

Show the numbers behind this figure

Setting	Line	Payment system	Medicare anchor
Hospital outpatient	Composite APC 8007, both MRIs	OPPS, national unadjusted	$537.85
Hospital outpatient, for comparison	Two single APC 5523 payments	OPPS, national unadjusted	$487.54
Hospital outpatient	70551-26 professional	PFS, Michigan Locality 01	$69.04
Hospital outpatient	72148-26 professional, 5% reduction	PFS, our arithmetic	$66.21
Imaging center	70551 global, full	PFS, Michigan Locality 01	$192.65
Imaging center	72148-TC at 50%	PFS, our arithmetic	$59.71
Imaging center	72148-26 at 95%	PFS, our arithmetic	$66.21

Two things stand out, and they point in different directions. On the hospital side, the composite replaces the single payments with one payment for the pair, and for this MRI pair it is $537.85, more than the $487.54 that two separate $243.77 payments would total. The rule explains why that is possible: CMS sets composite rates from the geometric mean costs of claims that actually carried more than one study in the family, and the composite includes packaged services on the same date. On the fee schedule side, the second study's technical component is paid at half, $59.71 instead of $119.42, and its reading at 95 percent, $66.21 instead of $69.69. So the idea that a second scan costs less holds under the fee schedule in Medicare's own arithmetic, but not automatically in the hospital's facility payment. For a patient, the point is the question to ask when two studies are ordered for one day: "Is your price for both studies together, and does it reflect the multiple-study pricing, or is it two single prices added?" A cash price is the facility's own, so the Medicare rules here are only the yardstick, not a guarantee of any discount.

The cap that ties the two systems together

One rule links the columns directly. Section 5102(b) of the Deficit Reduction Act of 2005, as the CMS relative value file documentation describes it, caps the fee schedule payment for the technical component of certain diagnostic imaging procedures, and the technical portion of global imaging services, at the outpatient payment amount. CMS compares the fee schedule amount with an OPPS-based amount and uses the lower, and it publishes the results in a separate OPPSCAP file listing the capped payment amounts by locality.

None of the eleven codes in this guide's table appears in the October 2026 OPPSCAP file for Michigan Locality 01, so for them the fee schedule anchors in the table are not reduced by the cap in that locality. The cap does bind for other imaging codes. CPT 72191, CT angiography of the pelvis without and with contrast, has a technical component that works out to $214.42 from its relative value units at Michigan Locality 01, but the OPPSCAP file lists $173.24 for that component in that locality, $41.18 lower. For comparison, Addendum B lists the hospital's national unadjusted payment for 72191 at $179.20. The practical reading is narrow: for the codes the cap covers, Medicare's payment to a freestanding setting for the technical work cannot exceed an amount tied to the outpatient rate. It says nothing about either setting's cash price.

How to read a quote against this table

Start with the exact CPT code on your order, and find its row. If you are quoted by a hospital outpatient department, expect at least two layers: a facility charge built on the OPPS logic and a professional charge for the interpretation. Ask whether the number you were given is the facility layer only, and who bills the professional layer. If you are quoted by an imaging center, expect one global number, and ask whether the radiologist reading is inside it or billed separately by an outside group. Then write down, for each setting, the code, the setting, each layer, and the name of whoever quoted it. The cash price guide gives the exact sentence to use, and the Price Anchor Explorer lets you pull the same anchors up by procedure and setting.

What these anchors cannot tell you

An anchor is an order of magnitude and a structure, not a quote and not a prediction. OPPS amounts here are national unadjusted rates; a real hospital payment is wage-index adjusted, and a real patient bill runs through a plan contract or a facility cash price that Medicare never published. PFS amounts here are one locality, Michigan Locality 01; another locality will differ. Contrast, sedation, additional body areas, and follow-up visits sit outside these rows, exactly as each procedure page lists under what the anchor excludes. If a figure on a quote surprises you, the useful question is not whether it matches an anchor. It is which layer the figure represents, for which code, in which setting. Those three answers make any two quotes comparable.

What to ask each setting before you book

• "Is this facility a hospital outpatient department, including an off-campus department owned by a hospital, or a freestanding imaging center?" The answer decides which payment logic applies, and off-campus hospital departments are not always obvious from the building.
• "Is your price a facility-only price or a global price, and who bills the professional interpretation fee?"
• "Does the price include contrast if the order changes to a with-contrast code on the day, and what will that code cost?"
• "Can you send the price in writing with the CPT code, the setting, and the inclusions named?"

Each question is billing only. None of them asks whether the study should happen, and this guide takes no position on that. The facility-type pages walk through each setting in more detail, and the billing checklist covers the day-of-change and separate-billing traps that sit outside imaging.

Comparisons that mislead

• Comparing a hospital facility-only quote with an imaging-center global quote and calling the hospital cheaper, before the professional layer arrives.
• Assuming an off-campus clinic is a freestanding center when it is billed as a hospital outpatient department.
• Quoting the without-contrast code when the order allows a with-contrast study, which moves the row in the table above from $243.77 to $356.43 on the single-service OPPS side for a brain MRI.
• Treating any anchor on this page as the price. Anchors frame the question; only the facility, in writing, gives the price.

The facility fee: the layer that follows the building, not the scan

Patients often use the words facility fee for the hospital layer in the table above, and billing offices use the same words for the charge that pays for the building, the equipment, and the staff who are not the clinician reading your study. Whatever the label on your quote, the structure is the one Medicare publishes. In a hospital outpatient department, the facility layer is paid under OPPS and the clinician is paid separately under the Physician Fee Schedule. In an imaging center or office, one global amount usually covers both parts. The fee follows the billing identity of the place, not the scanner inside it. Two rooms can run the same machine, take the same image, and bill under different logics because one room is billed as a hospital outpatient department and the other is not.

Under Original Medicare, that split reaches the patient as two kinds of cost sharing, not one. Medicare guidance for hospital outpatients says you generally pay a copayment to the hospital for each outpatient hospital service, and, after the Part B deductible, 20 percent of the Medicare-approved amount for doctor services. In most cases the copayment for a single service cannot be more than the Part A hospital stay deductible, but copayments across several services can add past that amount. A freestanding setting has no second hospital copayment in that structure. Your plan may price these layers differently, so treat this as the structure to ask about, not as a prediction of your own share. What Medicare patients pay for an outpatient procedure turns the split into dollar shares for five codes.

The billing identity can also change without the room changing at all. When a hospital buys a freestanding center or a physician practice, the same address can start billing as an off-campus hospital outpatient department, and the facility layer appears on quotes that used to be global. CMS is aware of the pattern: in the CY2026 OPPS final rule, CMS said it would use its authority to align payments for certain services delivered in hospitals and in off-campus facilities, in part so patients are not penalized with additional copayments simply based on where they receive care. Alignment for certain services is not equal prices for every scan today. For your booking, the practical point is narrower: ask whether the location bills as a hospital outpatient department today, not what it was called when you last used it.

You can surface the layer before you book. If the setting is a hospital, its price transparency posting is the first place to look: since January 1, 2021, hospitals have had to post standard charges, including the discounted cash price, free of charge and in a consumer-friendly display for at least 300 shoppable services, and CMS lists imaging among them. Note which location and setting the posted charge belongs to, and whether the professional reading is inside it. A freestanding imaging center is not covered by that hospital posting, so for that side of the comparison there is no posting to check. Ask the center directly, in writing, whether its price is global. Then line the two answers up in three rows: facility layer, professional layer, and all-in price for the exact CPT code.

A labelled illustration shows why the third row decides. Suppose, purely as arithmetic and not as a price for any code or facility, an imaging center quotes a global $380, and a hospital quotes $340 for the facility layer with the $85 professional layer billed separately. The hospital figure looks $40 lower until the layers are added: $340 plus $85 is $425, which is $45 more than the $380 global quote. Neither figure here is a real quote. The arithmetic is the lesson: a facility-only figure and a global figure are not the same kind of number, and only the all-in row can be compared.

Source: Centers for Medicare and Medicaid Services, CMS Empowers Patients and Boosts Transparency by Modernizing Hospital Payments, CY2026 OPPS final rule press release, November 21, 2025, and Hospital Price Transparency consumer guidance, checked October 29, 2026. Medicare, Medicare Hospital Benefits, on what outpatients pay, checked October 29, 2026.

The same outpatient payment system that prices a hospital scan also prices an overnight stay under observation. For people with Medicare, our guide to observation status versus inpatient status shows how the outpatient label changes the hospital share and the 3-day rule for skilled nursing care, and the ER visit level guide applies the facility-plus-professional split to emergency visits.

The same two-layer logic applies to surgery, priced for six surgical codes in surgery center against hospital outpatient, and to lab work, where the draw and the test are separate lines, in the lab fee schedule guide.

Setting comparison questions

Sources for the component, contrast and multiple-study rules

• CMS, Physician Fee Schedule relative value file RVU26D (October 2026 release): the -26 and TC values, status indicators, multiple procedure indicator 4, the OPPS cap description and the OPPSCAP file. Computed and checked October 29, 2026.
• CMS, OPPS quarterly addenda, October 2026 Addendum B: APC assignments and payment rates for the imaging codes, and status indicator N for the contrast agent codes. Checked October 29, 2026.
• Federal Register, CY2026 OPPS/ASC final rule (document 2025-20907), the multiple imaging composite APCs 8004 to 8008. Checked October 29, 2026.
• eCFR, 42 CFR 419.2, packaged costs under the outpatient payment system, including contrast agents; 42 CFR 410.33, independent diagnostic testing facilities. Text current as of October 27, 2026; checked October 29, 2026.

General billing information. Medicare anchors are not your bill. Prices only on this site: no diagnosis or treatment advice. Confirm your price in writing before service.

Next: How to ask for the cash price - Procedure pages with anchors by setting - How the anchors are sourced.