On July 15, 2025, the Centers for Medicare & Medicaid Services (CMS) released the CY26 Outpatient Prospective Payment System (OPPS) Proposed Rule, which includes significant updates to the Hospital Price Transparency (HPT) requirements. These proposals aim to improve the accuracy, comparability, and usability of pricing data for consumers, payers, and policymakers.
Below is a high-level overview of the key areas that may impact your hospital’s compliance and reporting obligations, as well as our firm’s initial considerations for responses to CMS. We welcome discussion with interested stakeholders.
- Strengthened Attestation Requirements
Beginning January 1, 2026, CMS proposes that hospitals include a revised attestation in their machine-readable files (MRFs) confirming that all standard charge data is complete, accurate, and compliant with CMS requirements. This includes a new mandate to name a senior official (e.g., CEO or president) responsible for data integrity. Additionally, if a payer-specific negotiated charge is expressed as a percentage or algorithm, hospitals would be required to disclose all necessary components—such as fee schedules, formulas, or referenced values—so that the public can derive an actual dollar amount from the algorithm.
CLEVERLEY + ASSOCIATES COMMENT
While we understand CMS’s goal of enhancing the context for the payer specific negotiated charge, we are concerned about the immense administrative burden required to encode all algorithm details supporting the allowed amounts in the MRF. Hospital-payer contracts typically include extensive supporting documentation, conditional pricing logic, and lists of thousands of variables that are not easily translatable into a machine-readable file format. Attempting to encode these algorithms in the MRF would exceed the capabilities of the current schema and require substantial manual effort.
We note that in the CY24 OPPS Final Rule, CMS acknowledged this complexity and stated:
“In the interest of reducing burden and complexity of files, we will allow hospitals [to] provide a description of the algorithm, rather than attempting to insert the specific algorithm itself in the MRF. We are therefore finalizing that if the standard charge is based on a percentage or algorithm, the MRF must also describe (instead of specify) what percentage or algorithm determines the dollar amount for the item or service. By describing, rather than specifying, what percentage or algorithm determines the dollar amount for the item or service, we believe this will balance the need for exact information versus MRF complexity, hospital burden, and the limitations of data processing.”
We support this previous language and encourage CMS to reaffirm this approach in the CY26 rulemaking. Importantly, even if all the algorithm contents could somehow be encoded into the single MRF, claims data would still need to be infused into an externally developed pricer to arrive at the payer specific negotiated charge. This extensive process would produce values consistent with the Estimated Allowed Amount (or new Allowed Amount). In sum, there would be an incredible administrative burden for hospitals and developers that would not yield any additional material benefit beyond what will be available in the Allowed Amount value.
Further, we would like to address a key assumption underlying the proposed framework—namely, the perception that the current “dollar amount” charge methodologies in the MRF (fee schedule, case rate, and per diem) are inherently simple and self-contained representations of payer-specific negotiated charges.
In our extensive experience evaluating thousands of hospital-payer contracts, we have yet to encounter a case where a fee schedule, case rate, or per diem amount exists in isolation. These values are always embedded within broader contractual algorithms that include:
- Payer specific code categorizations and carveouts with multiple payment methodologies dependent on claim-level conditions defined by custom case categories, HCPCS/CPT® codes and/or ranges, revenue code values/ranges, procedure and diagnosis code values/ranges, etc.
- Surgical case grouping logic dependent on relative weights of thousands of soft-coded CPT®/HCPCS conditions and multiple-procedure discounting rules that exist with corresponding lists of conditions and codes
- MSDRG platform versions and corresponding lists of relative weights, base rates, and markup conditions
- Charge threshold logic for lesser-of and stoploss provisions that is dependent on claim-level criteria
- Packaging and exclusion logic based on claim level criteria based on lists of codes and/or code ranges
- Hierarchy rankings to determine when/how the payment is calculated based on the types of services provided and conditions listed above
These elements are critical to determining the actual allowed amount a hospital receives and are not captured by the “payer-specific negotiated charge: dollar amount” field alone.
We understand that some contend that estimated allowed amounts are less accurate or complete, however, we believe they are in fact more representative of the full contractual payment structure. The allowed amount:
- Reflects the real-world adjudication of claims under all applicable contract terms,
- Incorporates all conditional logic and exceptions, and
- Provides a comparable, dollar-based benchmark across hospitals and payers.
In sum, we recommend that CMS:
- Maintain the current attestation statement without the requirement for hospitals to encode all algorithm components. Implementing the proposed statement would introduce an inconceivable administrative burden, overwhelm the file with conditional logic that cannot conform to the file schema, and undermine the goal of machine-readability and comparability. Further, even if all this logic could somehow be placed in an MRF, developers and researchers would still need additional claims data to determine the payer specific negotiated charge: this result is the current allowed amount so there is no additional gain to the public.
- Reconsider the emphasis on the “payer-specific negotiated charge: dollar amount” field for fee schedules, case rates, and per diems, by acknowledging that these values are components of broader algorithms, not standalone charges. Further, these charge methods are only a fraction of the methodologies employed in payer contracts contributing to confusion and misleading information. Instead, CMS should consider eliminating the “standard charge methodology” field in favor of a unified focus on allowed amount-based reporting, which is the only method that fully reflects the actual payment received and enables meaningful comparisons across hospitals.
- Replacement of Estimated Allowed Amounts
CMS proposes that hospitals report the median, 10th percentile, and 90th percentile allowed amounts, along with the count of allowed amounts, when negotiated charges are based on percentages or algorithms. These new data elements would replace the “estimated allowed amount” to provide a more accurate and representative view of pricing. Notably, CMS proposes a non-standard calculation method where, if a percentile falls between two observed values, the hospital must report the next highest actual allowed amount rather than averaging the two. This method is proposed to have MRF values reflect an actual historical payment amount from the dataset.
CLEVERLEY + ASSOCIATES COMMENT
We appreciate CMS’s continued efforts to improve HPT data and understand the intent behind replacing the “estimated allowed amount” with more statistically grounded data elements, including the 10th percentile, median, and 90th percentile allowed amounts. However, we respectfully submit the following concerns regarding the proposed methodology and data reporting requirements:
- Non-Standard Median & Percentile Calculation Methodology
We appreciate CMS’s commitment to improving the accuracy and usability of hospital pricing data and understand the intent behind requiring hospitals to report the next highest observed value when a percentile falls between two data points. However, we respectfully suggest that this approach may unintentionally mischaracterize standard statistical methods as less “real” or “actual.”
Standard methodologies for calculating percentiles—including medians, 10th, and 90th percentiles—are grounded in real, historical data and are widely accepted across healthcare analytics, actuarial science, and academic research. These methods often interpolate between observed values to more precisely reflect the central tendency or distribution of a dataset. Far from being abstract or theoretical, these interpolated values are statistically valid representations of actual values in the data.
We encourage CMS to recognize that these standard approaches are equally “real” in that they are derived from actual remittance data and may, in fact, provide a more accurate and representative view of pricing variation—particularly in datasets with skewed distributions or outliers. Allowing hospitals to use these established methods would preserve methodological integrity, enhance comparability across institutions, and support more meaningful insights for consumers, researchers, and policymakers.
In addition to our methodological concerns, we are also concerned about the administrative burden the proposed custom calculation method would impose on hospitals. The requirement to report the next highest observed value—rather than using standard percentile formulas—is not readily supported by most common statistical software platforms or data analysis tools. As a result, hospitals would need to develop custom logic or manual workarounds to comply, increasing the complexity, cost, and risk of error in data preparation. This added burden may disproportionately affect smaller hospitals or those with limited data science resources, without delivering a clear benefit over established, statistically valid methods that are already widely used, understood, and representative of actual values.
As a result, we encourage CMS to allow the use of standard percentile calculation methods to preserve methodological integrity, reduce burden, and support more accurate and meaningful comparisons across hospitals. This will allow hospitals to utilize standard statistical software to derive MRF values while also best representing the most likely payer specific negotiated charge to the public.
- HIPAA Sensitivity and Small Volume Counts
The proposal requires hospitals to report the count of allowed amounts used to calculate each percentile. While we understand the intent to provide context for statistical reliability, we are concerned that reporting exact counts below 11 may conflict with HIPAA de-identification standards and longstanding CMS data suppression policies.
Specifically, CMS and other federal agencies have historically suppressed or masked data when cell sizes are fewer than 11 to protect patient privacy. Publishing exact counts below this threshold could inadvertently enable re-identification, especially in rural and/or low-volume settings.
We urge CMS to consider allowing hospitals to suppress or mask counts below 11. Replacing values below this threshold with an asterisk or “<11” would balance the need for transparency with privacy concerns. In addition, we suggest only requiring the 10th and 90th percentile values when counts are 11 or greater. Doing so would better statistically capture true 10th and 90th percentile values and would also address privacy concerns among outlier situations. Median values, of course, could be statistically calculated with two claims or greater.
- Standardization of Data Sources and Methodology
CMS proposes that hospitals be required to use EDI 835 Electronic Remittance Advice (ERA) data to calculate allowed amounts to ensure consistency and accuracy. The lookback period for data would be limited to no longer than the 12 months preceding the effective date in the MRF, and zero-dollar claims would be excluded to avoid skewed results.
CLEVERLEY + ASSOCIATES COMMENT
We appreciate CMS’s efforts to standardize the methodology and data sources used to calculate allowed amounts in the Hospital Price Transparency (HPT) Machine-Readable Files (MRFs). We support the use of EDI 835 transaction data as the source of truth for allowed amounts, and we offer the following comments and recommendations:
- Lookback Period: Need for Flexibility to Ensure Data Completeness
While we understand the intent behind limiting the lookback period to no more than 12 months prior to the MRF posting date, we are concerned that this restriction may inadvertently reduce the completeness and reliability of the data.
Hospitals typically experience a claims adjudication lag of several weeks, meaning that the most recent months of data may be incomplete or unavailable. Further, hospitals require significant time to compile, validate, and publish the MRF in accordance with CMS formatting and attestation requirements. As a result, the effective lookback period may be significantly shorter than 12 months, particularly for hospitals with complex data structures, payer mixes or high volumes of claims.
To address this concern, we recommend that CMS allow hospitals to select a representative lookback period of up to 18 or 24 months from the MRF effective date. This approach would improve data completeness and stability while maintaining transparency and comparability.
- Future Consideration: Standardized Grouping Logic for Claims-Based Reporting
As CMS continues to refine the HPT framework, we encourage consideration of standardized grouping logic for claims data to enhance consistency and comparability across hospitals and payer plans.
Specifically:
- For inpatient claims, we recommend using the Medicare Severity Diagnosis-Related Group (MS-DRG) as the standard grouping mechanism.
- For outpatient claims, we recommend using the primary HCPCS code and associated Ambulatory Payment Classification (APC).
Since CMS has identified the claim as the authoritative data source for allowed amounts, it would be a natural and logical extension to apply claim-based grouping logic to standardize how services are categorized and reported. This would:
- Improve comparability across hospitals and plans,
- Reduce variation in how services are defined, and
- Align with existing CMS payment methodologies and data structures.
We believe this enhancement would significantly improve the utility of the MRFs for consumers, payers, researchers, and policymakers.
- National Provider Identifier (NPI) Requirement
CMS proposes that hospitals include their National Provider Identifier(s) in the MRF to improve data alignment with other healthcare datasets, such as those from the Transparency in Coverage initiative.
CLEVERLEY + ASSOCIATES COMMENT
We support CMS’s proposal to require hospitals to report their Type 2 National Provider Identifier (NPI) in the Machine-Readable File (MRF) as a means to improve data comparability and alignment with Transparency in Coverage (TiC) files. The NPI is a valuable identifier for linking to claims data and provider directories, and its inclusion in the MRF will enhance interoperability across datasets.
However, we believe there is also significant value in incorporating the CMS Certification Number (CCN), also commonly known in the industry as the Medicare Provider Number (MPN), into the MRF framework. The CCN is the foundational identifier used in Medicare cost reports, quality reporting programs, Hospital Compare/Care Compare, and Medicare claims and payment systems. Leveraging both the NPI and CCN would strengthen the linkage between hospital pricing data and other CMS datasets, improving the utility of the MRF for researchers, payers, and regulators.
To that end, we recommend that CMS consider requiring the CCN in the MRF file naming convention, in place of the Employer Identification Number (EIN). This change would create clarity and consistency around which facilities are required to produce an MRF and reinforce the expectation that each CCN should have a corresponding MRF. Additionally, we note that some hospitals have expressed sensitivity around the use of the EIN, as it is primarily a tax identifier and may not align with how hospitals are structured or represented in clinical and financial reporting systems. Using the CCN instead would reduce confusion and better reflect the operational identity of the hospital.
Within the file itself, hospitals could then list all associated Type 2 NPIs. This approach would preserve the benefits of NPI-based linkage while providing a valuable crosswalk between the CCN and NPI, supporting more robust data integration and analysis.
Importantly, using the CCN as the file identifier is preferable to including it as an additional data element within the file. This is because hospitals may have one-to-many relationships between a CCN and multiple NPIs. Using the CCN as the anchor for the file would align with other federal reporting structures and allow hospitals to list all associated NPIs within the file. This structure would provide a clear and valuable crosswalk between the CCN and NPI, while avoiding the confusion that could arise if multiple CCNs and NPIs were listed under a single EIN. If CMS elects to retain the EIN as the file identifier, we would then recommend against the inclusion of the CCN as a separate data element in addition to NPI as it could introduce ambiguity in cases of one-to-many relationships between all three identifiers. That said, we also recognize that some hospitals may not have a CCN—for example, non-Medicare certified entities—and in those cases, the EIN could continue to serve as the fallback identifier in these limited cases.
In sum, we believe this dual-identifier approach—using the CCN for file naming and the NPI within the file—would enhance transparency, reduce confusion, and improve the interoperability of hospital pricing data across CMS systems.
- Civil Monetary Penalty (CMP) Adjustments
CMS does not propose any new conditions under which CMPs would be imposed. The existing enforcement framework remains intact, meaning CMPs are only imposed when a hospital:
- Fails to respond to a CMS warning notice, or
- Fails to comply with a Corrective Action Plan (CAP) after receiving a request.
This is consistent with the current enforcement process outlined in prior rules and reaffirmed in this proposal. The only substantive change CMS proposes is the optional 35% penalty reduction if a hospital:
- Waives its right to an administrative hearing, and
- Accepts responsibility for the violation.
This is intended to streamline enforcement and encourage faster resolution of cases. However, this reduction is not available if the hospital fails to post an MRF or shoppable services file (i.e., core violations) or the hospital does not submit the waiver within 30 days of the CMP notice.
CLEVERLEY + ASSOCIATES COMMENT
We appreciate CMS’s approach in proposing a 35% reduction in civil monetary penalties for hospitals that waive their right to an administrative hearing and acknowledge noncompliance. This policy strikes a fair balance between accountability and administrative efficiency, encouraging timely resolution while reinforcing the importance of transparency. We support this change as a constructive incentive that promotes compliance and helps ensure that patients and stakeholders have access to accurate, actionable pricing information.
PROPOSED RULE:
The proposed rule (CMS-1834-P) can be downloaded at the Federal Register here: https://www.federalregister.gov/d/2025-13360.
PROVIDING COMMENT:
Stakeholders wishing to provide comment should follow the information below that’s contained within the proposed rule:
DATES: To be assured consideration, comments must be received at one of the addresses provided below, by September 15, 2025.
ADDRESSES: In commenting, please refer to file code CMS-1834-P.
Comments, including mass comment submissions, must be submitted in one of the following three ways (please choose only one of the ways listed):
- Electronically.
You may submit electronic comments on this regulation to http://www.regulations.gov. Follow the “Submit a comment” instructions.
- By regular mail.
You may mail written comments to the following address ONLY: Centers for Medicare & Medicaid Services, Department of Health and Human Services, Attention: CMS-1834-P, P.O. Box 8010, Baltimore, MD 21244-8010. Please allow sufficient time for mailed comments to be received before the close of the comment period.
- By express or overnight mail.
You may send written comments to the following address ONLY: Centers for Medicare & Medicaid Services, Department of Health and Human Services, Attention: CMS-1834-P, Mail Stop C4-26-05, 7500 Security Boulevard, Baltimore, MD 21244-1850.