The FY2027 IPF final rule (CMS-1847-F), issued by CMS on July 29, 2026, updates Inpatient Psychiatric Facility PPS payment rates by 2.3%, finalizes a facility-level outlier payment cap of 20% effective in FY2028, and implements the standardized IPF Patient Assessment Instrument (IPF-PAI). Total estimated Medicare payments to IPFs rise by roughly $60 million relative to FY2026. The rule takes effect for discharges on or after October 1, 2026. For behavioral health providers, the practical impact lands in two places: net payment per discharge and the cost report that documents it.
Below is a plain-language breakdown of what CMS finalized, how it differs from the earlier proposal, and what psychiatric facilities should do now to protect reimbursement and prepare accurate cost reports.
What CMS Finalized in the FY2027 IPF PPS Rule
CMS set the FY2027 payment update at 2.3%. That figure reflects a 2021-based IPF market basket increase of 3.2%, reduced by a 0.9 percentage point productivity adjustment. Across all IPFs, CMS estimates the update translates to an aggregate increase of about $60 million versus FY2026 payments, according to the CMS fact sheet on the final rule.
The rule updates the federal per diem base rate, the electroconvulsive therapy (ECT) payment amount, and the IPF wage index for FY2027. It also raises the outlier fixed dollar loss threshold from $39,360 in FY2026 to $40,750 for FY2027, keeping estimated outlier payments at 2% of total IPF PPS payments. A higher threshold means a case must run more expensive before it qualifies for outlier relief, which shifts more cost risk onto the facility for high-acuity stays.
These payment mechanics matter because the per diem, adjustment factors, and outlier threshold all feed directly into how a facility models expected reimbursement and, later, reconciles it on the Medicare cost report. Facilities serving complex psychiatric populations should test how the updated threshold changes their projected outlier recoveries before the fiscal year begins.
The New Facility-Level Outlier Payment Cap
The most consequential structural change is the new limit on outlier payments at the facility level. CMS finalized a policy to cap an individual IPF’s outlier payments at no more than 20% of its total IPF PPS payments in a year, as detailed in the Federal Register final rule. This is a departure from the historical approach, which applied outlier policy on a claim-by-claim basis with no aggregate ceiling per provider.
CMS built in an exception: the 20% cap does not apply to IPFs with fewer than 50 stays per year. Low-volume facilities, where a handful of extraordinarily costly cases could otherwise breach the cap through statistical noise, are protected from the limitation.
Importantly, CMS deferred the effective date. Rather than starting the cap in FY2027, the agency finalized it as effective for FY2028, applying to cost reporting periods beginning on or after October 1, 2027. CMS cited the need for additional time to evaluate the cost drivers that commenters raised during the comment period. The agency’s analysis found that a small number of IPFs report exceptionally high costs and receive outlier payments on a large share of their claims, driven largely by fixed routine costs such as labor, real estate, and overhead rather than patient-specific care intensity.
For high-outlier facilities, the deferral is a one-year runway, not a reprieve. Providers that currently rely on outlier payments for more than a fifth of their Medicare revenue should model the FY2028 cap now, because the fix is operational and financial, not administrative. That work typically involves examining the cost structure that flows through the Medicare cost report and understanding which routine cost centers are inflating per diem costs.
How the FY2027 IPF Final Rule Differs From the Proposed Rule
Pease Bell previously covered the FY2027 IPF proposed rule, so the useful question is what actually changed between proposal and finalization.
The headline 2.3% payment update carried through from the proposed rule essentially unchanged, so facilities that modeled the proposed update do not need to revise their top-line rate assumption. The more meaningful movement was on the outlier cap. CMS had proposed the facility-level cap but responded to stakeholder concerns by deferring the effective date to FY2028 and confirming the fewer-than-50-stays exception, giving providers more lead time to adjust.
On quality reporting, CMS finalized removal of two measures from the IPF Quality Reporting Program (IPFQR): the Alcohol Use Brief Intervention Provided or Offered and Alcohol Use Brief Intervention measure (SUB-2/2a) and the Tobacco Use Treatment Provided or Offered at Discharge measure (TOB-3/3a). Both removals begin with the calendar year 2026 reporting period, affecting the FY2028 payment determination, consistent with a broader effort to reduce reporting burden. A measure removal changes what a facility must abstract and submit, so facilities should update data collection workflows accordingly.
The IPF-PAI: A New Standardized Assessment
The final rule implements a standardized IPF Patient Assessment Instrument (IPF-PAI), required by the Consolidated Appropriations Act of 2023. This creates, for the first time, a uniform patient assessment data set across inpatient psychiatric facilities, comparable in concept to the assessment instruments already used in other post-acute settings.
CMS gives facilities two ways to submit IPF-PAI data. Providers can use a free CMS web application called the Patient Assessment Reporting Interoperability Tool (PARIT), or they can submit through Application Programming Interfaces (APIs) that CMS built on the HL7 FHIR specification. The API option lets facilities with capable electronic health record systems automate submission rather than key data manually.
The IPF-PAI is primarily a data and quality initiative rather than a direct payment lever in FY2027, but it carries downstream financial weight. Standardized assessment data becomes the foundation for future quality measurement and, potentially, future payment refinements. Facilities that build clean assessment and submission workflows now will be better positioned when CMS ties this data to scoring or payment in later rulemaking.
What Psychiatric Facilities Should Do Now
Start with a payment model refresh. Apply the 2.3% update, the FY2027 wage index, and the new $40,750 fixed dollar loss threshold to your case mix, then compare projected outlier recoveries to the prior year. High-acuity programs may see outlier eligibility tighten.
Next, run an outlier concentration analysis ahead of the FY2028 cap. Calculate what percentage of your total IPF PPS payments came from outliers over recent years. If that figure approaches or exceeds 20% and you have at least 50 annual stays, the FY2028 cap will reduce revenue unless you address the underlying cost structure. Because the cap targets facilities with high fixed routine costs, the review should reach into cost allocation and overhead, which is where cost report accuracy directly affects the outcome.
Finally, operationalize the IPF-PAI and confirm your IPFQR reporting obligations. Decide between PARIT and API submission, assign responsibility for assessment data quality, and update abstraction workflows to reflect any removed measures. Facilities operating under multiple behavioral health payment frameworks, including those managing CCBHC cost reporting, should coordinate these changes so assessment and cost data stay consistent across programs.
Reimbursement in the IPF space rewards facilities that treat the cost report as a financial instrument rather than a compliance formality. Firms with a dedicated behavioral health practice can help model the payment update, stress-test the FY2028 outlier cap, and align cost reporting with the finalized rule.
Frequently Asked Questions
What is the FY2027 IPF payment update percentage?
CMS finalized a 2.3% payment update for FY2027, based on a 3.2% IPF market basket increase reduced by a 0.9 percentage point productivity adjustment. Across all IPFs, CMS estimates the update raises aggregate Medicare payments by about $60 million relative to FY2026.
When does the FY2027 IPF final rule take effect?
The rule (CMS-1847-F) applies to IPF discharges occurring on or after October 1, 2026, through September 30, 2027. The separate facility-level outlier payment cap is deferred and becomes effective for FY2028, applying to cost reporting periods beginning on or after October 1, 2027.
What is the new facility-level outlier payment cap?
CMS finalized a cap limiting an individual IPF’s outlier payments to no more than 20% of its total IPF PPS payments in a year. Facilities with fewer than 50 stays per year are excepted. The cap is effective for FY2028, giving providers a year to adjust.
What is the IPF-PAI?
The IPF Patient Assessment Instrument is a new standardized patient assessment data set for inpatient psychiatric facilities, required by the Consolidated Appropriations Act of 2023. Facilities can submit data through the free CMS PARIT web application or through FHIR-based APIs.
How does the FY2027 rule affect cost reporting?
The updated fixed dollar loss threshold of $40,750 and the coming outlier cap both hinge on how routine and overhead costs flow through the Medicare cost report. Facilities with high fixed routine costs should review cost allocation before the FY2028 cap takes effect, because those costs drive both outlier eligibility and cap exposure.
How is the final rule different from the FY2027 proposed rule?
The 2.3% payment update carried through largely unchanged. The main differences are on the outlier cap: CMS deferred its effective date to FY2028 in response to comments, confirmed the fewer-than-50-stays exception, and finalized quality reporting changes including measure removals in the IPFQR program.
