Our second In Focus reviews the policy changes in the Centers for Medicare & Medicaid Services (CMS) for the calendar year (CY) 2026 Medicare Hospital Outpatient Prospective Payment System (OPPS) and Ambulatory Surgical Center (ASC) Payment System Proposed Rule (CMS-1834-P). This OPPS proposed rule, released January 15, 2025, includes several important policy revisions that will alter hospital margins and change administrative procedures beginning as soon as January 1, 2026.
Key Provisions in the CY 2026 Hospital OPPS and ASC Proposed Rule
For CY 2026, CMS proposes to make critical modifications to several hospital outpatient and ASC payment policies, which hospitals and other stakeholders will need to quickly adopt. We highlight and interpret the following seven proposed policies that may be among the most impactful for Medicare beneficiaries, hospitals and health systems, payers, and manufacturers:
- Proposed updates for OPPS and ASC payment rates are consistent with proposed inpatient rates.
- The phased elimination of the inpatient-only (IPO) list will cause services to shift to the outpatient setting.
- Expansion of the ASC covered procedures list will cause services to shift from the outpatient to ASC setting.
- Site-neutral payment to drug administration services will be expanded to all off-campus provider-based departments.
- Medicare Advantage data will be used to set weights for inpatient Medicare Severity Diagnosis Related Groups (MS-DRGs).
- 340B payment recovery will intensify to recover funds more quickly.
- A new survey will be conducted to gather data on the amount hospitals pay for drugs used in the hospital outpatient department.
Stakeholder comments on the OPPS and ASC Proposed Rule are due to CMS by September 13, 2025.
What the Seven Provisions Mean
1. The proposed payment update for OPPS and ASC rates is consistent with proposed inpatient rates.
Proposed Rule: Overall CMS’s CY 2026 Medicare OPPS and ASC Proposed Rule will increase 2025 payments to acute care hospitals by 2.4 percent in 2026, amounting to an estimated $4 billion increase in payments. This update is based on a hospital market basket increase of 3.2 percent and a 0.8 percent reduction for total factor productivity.
HMA Analysis: CMS’s 2.4 percent increase results from the estimated rate of increase in the cost of a standard basket of hospital goods, the hospital market basket. CMS estimates that total payments to OPPS and ASC providers (including beneficiary cost sharing and estimated changes in enrollment, utilization, and case mix) for CY 2026 will increase by roughly $8.1 billion and $480 million, respectively, from CY 2025 payment levels. The proposed outpatient and ASC rates are consistent with the proposed inpatient payment update for 2026.
2. Phased elimination of the IPO list to cause movement of cases from inpatient to outpatient setting.
Proposed Rule: CMS has long maintained a list of procedures and services that must be provided on an inpatient basis and are excluded from the OPPS. In the CY 2021 final rule, CMS finalized a proposal to eliminate the IPO list over three years, beginning with nearly 300 procedures. CMS noted various changes in technology and chose to defer to the clinical judgment of physicians which procedures can be safely performed in the hospital outpatient department based on the circumstances of individual patients. When the Biden Administration entered office in 2022, CMS halted the process of eliminating the inpatient-only list and reinstituted five criteria it had previously used to determine whether a procedure should be removed from the IPO list.
Under the Trump Administration, CMS now proposes to again eliminate the IPO list over a three- year period. For 2026, CMS proposes to eliminate 285 mostly musculoskeletal services from the IPO list. Across the next two rulemaking cycles CMS will eliminate the remaining services from the IPO list and the agency is requesting stakeholder input regarding which services should be eliminated from the IPO list in CY 2027.
HMA Analysis: If finalized, the policy to eliminate the IPO list is likely to spur a migration of many cases from the inpatient setting to the hospital outpatient setting. Many of these cases are likely to be surgical short-stay cases. Given that the proposed policy would defer largely to clinical judgment to determine which procedures are performed in the outpatient setting, we anticipate a degree of variability by hospital in how this policy plays out. We anticipate hospital revenues will decline because of this policy, as certain inpatient payment adjustments are inapplicable to the outpatient setting. We do not anticipate a cost sharing impact on patients due to policies that protect them from higher outpatient cost sharing. Because the Medicare IPO list has served as a foundation for many site of service coverage decisions, we anticipate payers will respond to this policy by encouraging more rapid migration of cases to the outpatient setting, which is likely to result in lower Medicare spending.
3. Expansion of the ASC covered procedures list will cause services to shift from the outpatient to ASC setting.
Proposed Rule: CMS proposes to add 547 services to the ASC covered procedures list.
HMA Analysis: CMS’s proposal to add 547 services to the ASC CPL enables greater fluidity of site of service for providers in deciding where to conduct procedures. Among these 547 services are 276 musculoskeletal services that are also proposed for removal from the OPPS IPO list. While state regulations concerning which procedures can be conducted in ASCs may affect which cases are eventually conducted in the ASC setting, CMS’s plan to expand the ASC CPL may enable some musculoskeletal services to move directly from the inpatient setting to the ASC setting in 2026. We anticipate that the expansion of the ASC CPL may result in lower revenues for hospitals as cases move from the inpatient or outpatient setting to the ASC. This shift may also result in lower Medicare spending.
4. Expansion of the site-neutral policy to drug administration services furnished in all outpatient provider-based departments.
Proposed Rule: Under the Bipartisan Budget Act of 2015, CMS is required to implement site-neutral payments for off-campus provider-based departments (PBDs). This legislation exempted PBDs (also known as “excepted PBDs”) established as of the date of enactment. The policy has generally paid affected services at 40 percent of the OPPS rate. The agency presents the results of its own analyses, showing growth in drug administration services in the OPPS even as the number of fee-for-service beneficiaries has decreased. CMS concludes that “the differential in our payment rates has created a payment incentive that had led to unnecessary growth for the services in the drug administration” payment rates.
CMS proposes to apply the Medicare Physician Fee Schedule (PFS) payment adjustment to drug administration payments for services performed at excepted off-campus PBDs, which will be the same reimbursement rates available to non-excepted PBDs. This adjustment is proposed to be made in a non-budget-neutral manner. CMS also asks for comments on whether the PFS adjuster should be applied to other services. CMS also issues a request for information (RFI) on the potential to expand site-neutral payments for clinic visits to include on campus clinic visit services and a second RFI seeking information on the possibility of adjusting OPPS payments for services “predominantly performed” in the ASC or physician’s office setting
HMA Analysis: CMS estimates this policy will yield $280 million in savings to Medicare for 2026, which will translate into commensurate revenue reductions for the hospital industry. Although CMS proposes to exempt rural sole community hospitals from this policy, other types of safety net providers may also seek an exemption.
5. The use of Medicare Advantage data to set weights for inpatient MS-DRGs.
Proposed Rule: CMS proposes to require hospitals to submit to CMS Medicare Advantage payment information through their annual hospital cost reports for later use in setting Medicare inpatient PPS payment rates. As a part of this proposal CMS will require hospitals to include in their annual cost report submissions to CMS their median negotiated payer-specific Medicare Advantage charges by individual MS-DRG. CMS proposes to begin collecting these data in the 2026 cost reporting period, and to use these data to set MS-DRG relative weights beginning in FY 2029. CMS asserts that the agency intends to make these changes to reduce its reliance on the hospital chargemaster for setting rates for inpatient services and instead create a market-based approach to rate setting.
HMA Analysis: The first Trump Administration proposed a nearly identical policy in the CY 2021 rulemaking cycle. Like the IPO list history, this proposed policy was not implemented in the CY 2022 rulemaking cycle when the Biden Administration was in place. If implemented for 2026, the reporting of negotiated charge data will add administrative complexity to hospitals’ cost reporting processes. It is unclear whether the use of these data in the IPPS rate setting process will increase or decrease payment rates. Therefore, it is unclear how this policy might affect hospital revenue or Medicare spending.
6. Increase the pace of 340B payment recovery from hospitals to recover funds more quickly.
Proposed Rule: CMS proposes to change its policy for recovering past overpayments resulting from the budget neutrality adjustments accompanying prior cuts to reimbursement for 340B drugs. The 340B recoupment process was scheduled to begin in 2026 by reducing the hospital outpatient conversion factor by 0.5 percent annually until $7.8 billion in payments were recovered. CMS forecasted this would occur annually for 16 years; however, the CY 2026 OPPS proposed rule calls for reducing the outpatient conversion factor by 2 percent over the span of six years.
HMA Analysis: If implemented, CMS’s proposed 340B recovery policy will result in a payment reduction to hospitals of $1.1 billion in 2026. We anticipate the scale of this impact will continue during the subsequent five years that the policy is in place. We expect that hospital opposition to this proposed change will be significant.
7. New survey to gather data on the amount hospitals pay for drugs used in the hospital outpatient department.
Proposed Rule: CMS announced its intent to conduct a new survey to gather information from hospitals about the amount they pay for drugs used in the outpatient setting. The survey of drug acquisition costs will apply to specified covered outpatient drugs (SCODs) and “drugs and biologicals that CMS historically treats as SCODs.” The survey will begin at the end of 2025 and end in early 2026. CMS has stated that it intends for these survey results to “inform policy making” beginning with the 2027 rulemaking cycle.
HMA Analysis: The data collected through this survey effort could be used to set payment rates for Part B drugs or to inform 340B payment policy, but how exactly these data would be used is unclear. CMS noted that an adequate response rate will be necessary and asks for input on how to interpret nonresponses, such as assuming that non-responding hospitals have very low drug costs and therefore payment for drugs and biologics could be packaged with other services. CMS also noted that other sources of drug data could include the Federal Supply Schedule (FSS) or other benchmarks or different markups to ASP data.
HMA’s Medicare Practice Group Can Help
The Health Management Associates, Inc. (HMA), Medicare Practice Group monitors federal regulatory and legislative developments in the hospital space and assesses the impact on hospitals, life science companies, payers, and other stakeholders. Our experts interpret and model hospital payment policies and assist clients in developing CMS comment letters and long-term strategic plans. Our team replicates CMS payment methodologies and model alternative policies using the most current Medicare fee-for-service and Medicare Advantage (100 percent) claims data. We also support clients with DRG reassignment requests, New Technology Add-on Payment (NTAP) applications, and analyses of CMS Innovation Center alternative payment models.
For more information or questions about the policies described below, please contact our experts below.