Hospital Price File 2026: How to Find and Use a Hospital's Machine-Readable Data

What the Law Actually Requires — and What Changed in 2026

The hospital price transparency requirements are codified in regulation at 45 C.F.R. Part 180 and require most hospitals to make public their standard charges online, including a comprehensive machine-readable file that contains gross charges, discounted cash prices, payer-specific negotiated charges, and de-identified minimum and maximum negotiated charges for all hospital items and services, as provided in § 180.50.

CMS released significant updates in the CY 2026 Outpatient Prospective Payment System (OPPS) and Ambulatory Surgical Center (ASC) Final Rule. Beginning January 1, 2026, with enforcement starting April 1, 2026, hospitals are required to rely on standardized data sources, report more precise allowed-amount information, and submit stronger attestations to support clearer, more meaningful price comparisons.

The 2026 rule means hospitals can no longer post estimated allowed amounts when payer-specific charges are expressed as a percentage or algorithm. Instead, hospitals must disclose actual dollar amounts: the median allowed amount, and the 10th and 90th percentile allowed amounts, drawn from real historical claim data — specifically, 835 electronic remittance advice files from a 12–15 month lookback period. That's a meaningful upgrade for patients. Before 2026, a hospital could satisfy the rule by posting a rough average; now it must post figures anchored to what it actually collected.

Additionally, the 2026 rule replaces an older affirmation statement with a new, strengthened attestation requirement at 45 C.F.R. § 180.50(a)(3)(iii), requiring hospitals to attest: "To the best of its knowledge and belief, this hospital has included all applicable standard charge information in accordance with the requirements of 45 CFR 180.50, and the information encoded is true, accurate, and complete as of the date in the file. This hospital has included all payer-specific negotiated charges in dollars that can be expressed as a dollar amount." A hospital CEO or designated senior official must sign off on that statement — giving it legal weight it previously lacked.

A Glossary of the Five Price Columns You'll See in the File

When you open an MRF, you'll encounter five distinct price types, each defined in regulation at 45 CFR § 180.20. They are not interchangeable — and confusing them is one of the most common mistakes patients make when reviewing these files.

For patients with insurance, the column that matters most is the payer-specific negotiated charge. The "gross charge" relates to established prices billed to all patients regardless of insurance coverage, while the "negotiated charge" relates to the prices insurance companies have agreed to pay for services. Your out-of-pocket cost is typically your cost-sharing percentage (deductible, coinsurance) applied to the negotiated charge — not the gross charge. If your bill charges more than the negotiated rate, that's a billing error worth flagging. You can also learn more about how adjustments on a hospital bill work and how to verify them.

Illustrative Scenario: Finding and Using Your Hospital's MRF

The following is an illustrative walkthrough using a fictional patient and hospital. It is not drawn from a real case. Dollar amounts are for demonstration only.

Imagine Maria, a 54-year-old with a Blue Cross PPO plan, receives a bill after an outpatient CT scan at Riverside General Hospital. The bill shows a charge of $2,800. Her Explanation of Benefits (EOB) shows an "allowed amount" of $1,950, her deductible covers $600, and her coinsurance covers $270. She wants to check whether those figures are correct.

Step 1 — Locate the MRF. Maria goes to Riverside General's website and searches for "price transparency" or "machine-readable file." Files must be publicly accessible via direct URL without requiring user interaction, login, or password. If she can't find it with a search, she tries navigating directly to hospitalwebsite.com/cms-hpt.txt — CMS requires hospitals to maintain a standardized text file at that path pointing to the MRF's location. The file is typically in JSON or CSV format.

Step 2 — Find her CPT code. Maria checks her EOB and itemized bill for the CPT code for her CT scan (in this example, CPT 74177 — CT abdomen and pelvis with contrast). The MRF must include any code used by the hospital for purposes of accounting or billing, including CPT codes, HCPCS codes, DRGs, NDCs, or other common payer identifiers. Maria opens the CSV file in a free tool like Google Sheets and uses Ctrl+F to search for "74177."

Step 3 — Check the payer-specific negotiated charge. She finds a row for CPT 74177 and her insurer's name. The payer-specific negotiated charge listed is $1,750. Her EOB says the allowed amount was $1,950 — $200 higher than the negotiated rate in the MRF. That gap is her flag. She also checks the de-identified minimum negotiated charge ($1,200) and maximum ($2,100) to confirm the $1,950 is within the plausible range — it is, but it's still above the specific contracted rate for her plan.

Step 4 — Dispute the discrepancy. Maria requests her itemized bill (her right under federal law), then contacts her insurer's member services to ask why the allowed amount exceeds the MRF's payer-specific negotiated rate. She also contacts the hospital's billing department with the same question. This is exactly the kind of overcharge a machine-readable file lets you document before you pay. See our guide on spotting and disputing phantom charges on hospital bills for related dispute tactics.

How to Actually Open These Files Without a Technical Background

MRFs are typically enormous — a large hospital system's file can run hundreds of megabytes in JSON or CSV format. Opening them in a standard text editor will freeze most computers. Here's what actually works:

• CSV files: Import them into Google Sheets (File → Import) or Microsoft Excel. Use the filter or search function to find your CPT, HCPCS, or DRG code. Be aware that very large files may need to be split or filtered before they fully load.
• JSON files: These require a bit more effort. Free online tools like jsoncrack.com or command-line tools like jq let you search specific keys. Alternatively, use a free code editor like VS Code with the "JSON Tools" extension and search for your procedure code.
• Third-party lookup tools: Several nonprofit and commercial platforms aggregate MRF data and let you search by hospital name and procedure code without opening a raw file. CMS also publishes its own MRF lookup resources at cms.gov.

The MRF must include identifying information such as hospital name, hospital location, hospital address, hospital licensure information, and Type 2 Organizational NPI, as well as standard charge information covering gross charges, discounted cash prices, payer names, plan names, standard charge methodology, and payer-specific negotiated charges expressed as dollar amounts. If your hospital's file is missing your insurer's name entirely, that itself may be a compliance deficiency worth reporting to CMS.

What the Compliance Picture Looks Like — and Why It Matters

A 2024 audit by the HHS Office of Inspector General examined 100 randomly selected hospitals and found that 37 failed to meet one or both key requirements — with 34 not complying with machine-readable file requirements specifically. That's a meaningful noncompliance rate, and it means the file you find may be incomplete or outdated. Always check the "last updated" date on the MRF before relying on it.

CMS issued 10 civil monetary penalties against hospitals in 2025, more than doubling the annual pace of the prior administration. CMS bases its civil monetary penalties on hospital bed counts, with three tiers: hospitals with more than 550 beds can be fined up to $5,500 per day; hospitals with 31 to 550 beds face a daily fine of $10 per bed; and hospitals with 30 or fewer beds may receive a daily fine of up to $300.

If you find that a hospital hasn't posted its MRF, or the file is clearly incomplete or password-protected, you can file a complaint directly with CMS. CMS audits a sample of hospitals, in addition to investigating complaints submitted to CMS, and hospitals may face civil monetary penalties for noncompliance. Submitting a complaint takes about 10 minutes at the CMS website and costs you nothing. The existence of this enforcement pathway is one reason MRF data has become meaningfully more complete over the past two years.

Understanding how the MRF fits into the broader billing picture is also important. If the MRF reveals a significant gap between what the hospital negotiated with your insurer and what actually appeared on your claim, that discrepancy could point to upcoding — a practice where hospitals bill for a more expensive service than was actually provided. The MRF gives you the contracted benchmark; your itemized bill gives you the line items. Comparing the two is the core of any effective bill review.

Decision Tree: Should You Request the MRF, the Itemized Bill, or Both?

When the MRF Doesn't Match Your Bill: Next Steps

A discrepancy between an MRF figure and your actual bill doesn't automatically mean you've been defrauded — but it is always worth asking about. Hospitals sometimes bill for a service under a different CPT code than the one in the MRF, which could reflect legitimate clinical coding or could reflect incorrect billing codes that inflate your charges. Either way, you're entitled to an explanation in writing.

Here's what to do when you find a discrepancy:

1. Request your itemized bill in writing. The itemized bill lists every individual charge with its code. This is the document you compare against the MRF line by line.
2. Contact your insurer's member services. Ask why the "allowed amount" on your EOB differs from the payer-specific negotiated charge for your plan listed in the hospital's MRF. Get the response in writing or by secure portal message.
3. Write to the hospital billing department. Reference the specific CPT code, the MRF's stated negotiated rate for your insurer, and the amount you were actually billed. Ask for a written reconciliation.
4. File a CMS complaint if the MRF is missing or clearly incomplete. You can submit a tip at the CMS Hospital Price Transparency enforcement page. The enforcement dataset tracks CMS actions following a compliance review of a hospital's obligation to establish, update, and make public a list of the hospital's standard charges for items and services, in accordance with regulation at 45 CFR Part 180.
5. Know your appeal rights. If your insurer's claims processing is the problem, you have formal internal and external appeal rights. Our post on the federal Independent Dispute Resolution process explains how that works when negotiations break down.

MRF files must be updated at least annually, with more frequent updates required when standard charges change significantly. If your care was recent and the MRF still shows last year's rates, that's worth flagging. The 2026 attestation requirement now makes the hospital's leadership legally accountable for the accuracy of what's posted — which gives your dispute letter more teeth than it had before.

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.