Why price transparency exists
For most of the history of American healthcare billing, the price of a medical service was effectively a secret between a hospital and an insurance company. A patient could ask what an MRI cost and get a chargemaster number that almost nobody actually paid, or no answer at all. Insurers treated their negotiated rates as trade secrets, protected in contract language and rarely disclosed even to the employers buying the coverage.
That opacity was not accidental. A payer that knows what every other payer pays a hospital has less room to justify its own rate. A hospital that cannot see a competitor's negotiated price cannot easily argue it is underpaid. The information asymmetry protected incumbents on both sides of the table — at the direct expense of the patients and employers paying the bill, and the smaller providers with no way to check whether their own contract was fair.
Price transparency law exists to break that asymmetry deliberately: to force the prices that were already being paid, quietly, into public, structured, machine-readable form — not to set new prices, but to make the ones already in effect impossible to hide.
The two rules, at a glance
"Price transparency" is actually two separate federal rules, regulating two separate parties, that happen to have been built to work together.
| Hospital Price Transparency Rule | Transparency in Coverage Rule | |
|---|---|---|
| Formal name | Hospital Price Transparency Rule (45 CFR Part 180) | Transparency in Coverage (TiC) Rule |
| Who is regulated | Every U.S. hospital | Group health plans and health insurance issuers (non-grandfathered) |
| Finalized | November 15, 2019 | November 12, 2020 |
| Took effect | January 1, 2021 | Plan years on/after January 1, 2022 (enforced from July 1, 2022) |
| Machine-readable file(s) | One comprehensive file of standard charges per hospital | Three files: in-network rates, out-of-network allowed amounts, prescription drug rates |
| Consumer-facing tool | 300 "shoppable services" in plain-language format | Personalized cost-estimate tool (phased in 2023–2024) |
| Update frequency | At least annually | Monthly |
| Regulator | CMS | CMS, Department of Labor, and Treasury (jointly) |
Timeline: 2010–2026
Sixteen years, one law, and a series of increasingly specific rules built to close the gaps the previous one left open.
- 2010
The Affordable Care Act plants the seed
Section 2718(e) of the Public Health Service Act, added by the ACA, requires every hospital to make public — on request — a list of its standard charges for items and services. No format is specified, and for most of the next decade compliance means a PDF chargemaster nobody outside billing can actually read.
- August 2019
HHS proposes the Hospital Price Transparency Rule
CMS proposes turning the ACA's vague "make public on request" language into an enforceable rule with real specifications: a machine-readable file of every standard charge, plus a consumer-facing list of 300 "shoppable" services.
- November 15, 2019
The Hospital Price Transparency Rule is finalized
CMS finalizes the rule as part of the CY2020 hospital outpatient payment rule, with an effective date of January 1, 2021. Hospitals will have to publish gross charges, discounted cash prices, and payer-specific negotiated rates — including the actual rates negotiated with each insurer, not just a self-pay price.
- December 4, 2019
The American Hospital Association sues to block it
The AHA and several hospital groups file suit in U.S. District Court, arguing the rule exceeds CMS's statutory authority under the ACA and compels speech in violation of the First Amendment.
- June 2020
District court sides with CMS
The district court rejects the AHA's arguments and upholds the rule, clearing the way for the January 2021 effective date to hold.
- December 29, 2020
D.C. Circuit affirms, unanimously
A three-judge panel of the U.S. Court of Appeals for the D.C. Circuit rejects the hospital groups' appeal, holding that CMS reasonably weighed the rule's consumer benefits against the compliance burden on hospitals. The rule is going into effect.
- November 12, 2020
The payer-side rule is finalized: Transparency in Coverage
CMS, the Department of Labor and the Treasury jointly finalize the Transparency in Coverage (TiC) rule — the mirror-image requirement for health plans and insurers, not hospitals. Plans will have to publish their own machine-readable files of negotiated rates.
- January 1, 2021
The Hospital Price Transparency Rule takes effect
Every U.S. hospital is now required to publish a comprehensive machine-readable file of standard charges and a shoppable-services display. Early compliance is poor — multiple audits over the following two years find a majority of hospitals missing required data elements or publishing files that do not meet the format requirements.
- December 27, 2020 / January 1, 2022
The No Surprises Act arrives
Signed into law in December 2020 as part of the Consolidated Appropriations Act, 2021, the No Surprises Act takes effect January 1, 2022. It protects patients from most surprise out-of-network bills, and separately requires providers to give uninsured and self-pay patients a written Good Faith Estimate before a scheduled service.
- January 1, 2022
CMS raises the penalties for non-compliant hospitals
Effective with the CY2022 outpatient payment rule, CMS scales civil monetary penalties by hospital size: a $300/day minimum for hospitals with 30 or fewer beds, up to $10 per bed per day (capped at $5,500/day) for larger hospitals — a maximum of just over $2 million a year for the largest systems, versus $109,500 under the original flat penalty.
- July 1, 2022
Payer machine-readable files become enforceable
CMS had granted enforcement discretion on the Transparency in Coverage MRF requirement past its original January 2022 applicability date; enforcement formally begins July 1, 2022, with a technical file specification ("Version 1.0") finalized that March.
- June 2022
CMS issues the first hospital price transparency penalties
After more than a year of warning notices and corrective action plans, CMS announces the first civil monetary penalties actually levied against non-compliant hospitals — a signal that enforcement has moved from theoretical to real.
- January 1, 2023 → January 1, 2024
The payer price-comparison tool phases in
The Transparency in Coverage rule's second consumer-facing requirement — an internet-based self-service tool that estimates a member's cost-sharing for a specific service — rolls out for 500 CMS-specified shoppable items and services on January 1, 2023, then expands to all covered items and services on January 1, 2024.
- November 2023
CMS standardizes the hospital file format
The CY2024 outpatient payment rule finalizes the most significant rewrite of the Hospital Price Transparency Rule since 2021: a CMS-specified, machine-parseable file template (CSV or JSON) with standardized data elements, replacing the free-form files hospitals had been publishing. Most changes take effect July 1, 2024; an "estimated allowed amount" data element follows on January 1, 2025.
- July 1, 2024
Standardized files become mandatory
Hospitals must publish their machine-readable files in the CMS template format, with encoded (not free-text) data elements — a change built specifically to make automated compliance-checking and third-party data aggregation possible at scale.
- November 21, 2025
CY2026 rule adds percentile pricing and executive attestation
The CY2026 outpatient payment rule adds new requirements for hospitals whose negotiated rates are set as a percentage or algorithm rather than a dollar amount: they must disclose the 10th percentile, median, and 90th percentile allowed amounts, calculated from standardized claims data (EDI 835 remittance data or equivalent). It also requires a CEO or senior-official attestation that the published file is accurate, and offers hospitals a 35% civil-penalty reduction for waiving their appeal rights and resolving non-compliance quickly.
- January 1, 2026 / April 1, 2026
CY2026 requirements take effect
The percentile-pricing, attestation and NPI-encoding requirements become effective January 1, 2026; CMS enforcement of the new requirements begins April 1, 2026, giving hospitals a short grace window to comply.
What hospitals must publish
Every hospital is required to publish a single comprehensive machine-readable file covering every item and service it provides — not a sample, all of it — with five required price points for each one. As of July 2024, that file has to follow a CMS-specified template with encoded field names, not free-form text, so the file can be parsed automatically rather than read one line at a time.
- Gross charge
- The hospital's full chargemaster price before any discount — the number almost nobody actually pays, but the one most patients see first on a bill.
- Discounted cash price
- What the hospital charges a self-pay patient who pays out of pocket, without going through insurance.
- Payer-specific negotiated charge
- The actual rate the hospital and a specific health plan agreed to — listed by payer and plan name. This is the number most useful for benchmarking, and it's what MedReveal indexes.
- De-identified minimum negotiated charge
- The lowest rate the hospital has negotiated with any payer for that item or service, with the payer identity stripped out.
- De-identified maximum negotiated charge
- The highest negotiated rate for that item or service across all payers, again without naming which one.
Alongside the comprehensive file, hospitals must also publish a consumer-friendly list of 300 "shoppable services" — procedures a patient can reasonably schedule in advance, like an MRI or a knee replacement. CMS specifies 70 of these services directly (the ones patients search for most); hospitals choose the remaining 230 themselves. Since the CY2026 rule, hospitals whose negotiated rates are set as a percentage or formula rather than a flat dollar amount also have to disclose the 10th percentile, median, and 90th percentile allowed amount for that arrangement, computed from actual claims remittance data.
What payers must publish
The Transparency in Coverage rule asks health plans and insurers for something broader than any one hospital's file: the negotiated rate for every in-network provider, for every covered code, updated monthly. In practice this produces enormous files — a national payer's in-network rate file can run into the hundreds of gigabytes — published as three separate machine-readable files:
- In-network rate file — the negotiated rate between the plan and every contracted provider, for every billing code that provider bills.
- Out-of-network allowed-amount file — what the plan actually paid, historically, for out-of-network claims, by code and geography.
- Prescription drug file — in-network negotiated rates and historical net prices for covered drugs. CMS deferred enforcement of this file once the Consolidated Appropriations Act, 2021 created a separate, overlapping prescription-drug reporting requirement (RxDC), so most plans have not published it independently.
Separately, plans must offer members a personalized cost-estimate tool — enter a procedure code and your own plan details, get back an actual expected cost-sharing number, not a published rate. That requirement rolled out for 500 CMS-specified services on January 1, 2023, and expanded to every covered item and service on January 1, 2024.
The No Surprises Act & good faith estimates
Signed into law in December 2020 and effective January 1, 2022, the No Surprises Act is a different kind of law than the two MRF rules above — it is a billing-protection statute, not a disclosure rule. Its best-known provision bans most surprise out-of-network bills for emergency care and for out-of-network providers working inside an in-network facility.
Its price-transparency-adjacent piece is the Good Faith Estimate (GFE): any uninsured or self-pay patient must receive a written estimate of expected charges before a scheduled service, on a fixed timeline.
| Scenario | Estimate deadline |
|---|---|
| Service scheduled 10 or more days in advance | Estimate due within 3 business days of scheduling |
| Service scheduled 3–9 days in advance | Estimate due within 1 business day of scheduling |
| Patient requests an estimate without scheduling | Estimate due within 3 business days of the request |
Enforcement: penalties and process
CMS does not fine a hospital the moment a file is missing. Enforcement of the Hospital Price Transparency Rule follows a fixed sequence: a warning notice with 90 days to correct the deficiency, then — if uncorrected — a request for a corrective action plan with a 45-day deadline, and only then a civil monetary penalty. The first penalties under this process were actually issued in June 2022, more than a year after the rule took effect.
Hospitals with 30 or fewer beds
$300/day minimum$109,500/year minimum
Hospitals with more than 30 beds
$10 per bed per day, capped at $5,500/dayUp to $2,007,500/year for the largest hospitals
The CY2026 rule adds an incentive on top of the penalty structure: a hospital that waives its right to an Administrative Law Judge hearing and resolves a non-compliance finding quickly gets a 35% reduction on the civil monetary penalty. Payer-side enforcement of the Transparency in Coverage rule works differently — it splits across CMS, the Department of Labor, and the Treasury, depending on whether the plan is fully insured, self-funded, or a federal program.
From raw files to usable data
Publishing a compliant file and publishing a usable one turned out to be very different problems. A national payer's in-network rate file can list millions of rate rows across every provider, code, and network tier in the country, in a raw JSON structure never meant for a person to open directly. Early audits of hospital files found the same issue from the other direction: inconsistent column names, rates buried in nested structures, and gross charges mixed in with negotiated rates with no reliable way to tell them apart programmatically. The 2024 and 2026 standardization rules exist specifically to close that gap — but even a perfectly standardized file is still a file, not an answer to "what should this code pay."
That is the layer MedReveal operates in: downloading, parsing, and indexing the machine-readable files these rules require, so a specific question — what does this payer pay for this code, in this state, for this specialty — resolves to a number in seconds instead of a multi-day data-engineering exercise.
Frequently asked questions
- What is the difference between a chargemaster price and a negotiated rate?
- A chargemaster (gross charge) is the hospital's sticker price before any discount — a starting number, not a real transaction price. A negotiated rate is the actual dollar amount a specific payer contractually agreed to pay for that code. Nearly every real payment runs off the negotiated rate, not the chargemaster.
- Is the Hospital Price Transparency Rule the same as the Transparency in Coverage rule?
- No — they regulate different parties. The Hospital Price Transparency Rule requires hospitals to publish their own standard charges. The Transparency in Coverage rule separately requires health plans and insurers to publish the rates they negotiate across every provider in their network. Together, they are the reason negotiated-rate data exists in public, machine-readable form at all.
- What is a machine-readable file (MRF)?
- A structured data file — CSV or JSON, not a PDF — that a computer program can parse without manual re-entry. As of July 2024, hospitals must use a CMS-specified template with standardized field names, which is what makes automated tools like MedReveal possible at national scale.
- Do hospitals and insurers actually comply?
- Compliance has improved steadily but unevenly since 2021. Early independent audits found a majority of hospitals missing required fields or publishing malformed files; CMS has responded with escalating penalties (2022), a standardized file format (2024), and automated file-crawling plus executive attestation requirements (2026) specifically to close the compliance gap.
- Does price transparency data cover Medicare and Medicaid rates too?
- The machine-readable files cover privately negotiated commercial rates. Medicare rates are set separately and published on their own schedule through the CMS Physician Fee Schedule and other Medicare fee schedules — both are usually read side by side, which is why Medicare is the common reference point in most rate benchmarking.
- What happens if a hospital or payer just does not publish the files?
- For hospitals: a warning notice, a 90-day correction window, a corrective action plan with a 45-day deadline, and then civil monetary penalties that can reach roughly $2 million a year for the largest hospitals. CMS began actually levying these penalties in June 2022. Payer non-compliance is enforced separately by CMS, the Department of Labor, and the Treasury, depending on the type of plan.
Sources
Every date and figure above is drawn from the federal regulations and agency guidance themselves, not secondary summaries:
- 45 CFR Part 180 — Hospital Price Transparency (eCFR)
- CMS — Hospital Price Transparency
- Federal Register — CY2020 OPPS Final Rule (original Hospital Price Transparency Rule)
- CMS — Transparency in Coverage Final Rule
- U.S. Department of Labor — FAQs About ACA Implementation Part 70
- Holland & Knight — CY2024 OPPS/ASC Final Rule summary
- Holland & Knight — CY2026 OPPS/ASC Final Rule summary
- HFMA — D.C. Circuit rejects AHA v. Azar appeal (Dec. 2020)
- Morgan Lewis — No Surprises Act, Good Faith Estimates