What Changed in the FY 2027 IPF PPS Rate Update?
As of October 2026, the FY 2027 Inpatient Psychiatric Facility Prospective Payment System (IPF PPS) rate update is in effect for all Medicare discharges occurring from October 1, 2026 through September 30, 2027. The final rule, CMS-1847-F, updates payment rates with a market basket increase adjusted for productivity, sets the ECT payment per treatment at $675.13, and introduces a new patient assessment instrument that changes documentation requirements for psychiatric facilities billing Medicare.
- ECT payment update: The per-treatment ECT payment increased from $673.85 in FY 2026 to $675.13 in FY 2027, reflecting the market basket adjustment applied to this separately payable service.
- Market basket increase: CMS applied a market basket increase factor with a productivity adjustment to update the per diem base rate, the ECT rate, and the outlier threshold for FY 2027.
- Patient assessment changes: CMS finalized updates to the IPF patient assessment instrument, which affects how psychiatric facilities document and report patient status for payment purposes.
What the FY 2027 IPF PPS Rule Includes
CMS finalized the FY 2027 IPF PPS rule (CMS-1847-F) on July 29, 2026, with an effective date of October 1, 2026. On October 1, CMS published a correction (Federal Register document 2026-20134) addressing technical errors in the original final rule. Both documents apply to all Medicare inpatient hospital services provided by inpatient psychiatric facilities for discharges occurring during FY 2027.
The rule updates three core payment components. The per diem base rate, which is the foundation of IPF PPS reimbursement, receives the annual market basket increase adjusted for a productivity factor. The ECT per-treatment payment moves from $673.85 to $675.13. And the outlier threshold, which determines when a case qualifies for additional payment beyond the per diem, is recalculated based on updated charge data and cost-to-charge ratios.
Beyond the rate mechanics, CMS finalized a new patient assessment instrument for IPFs. This instrument changes the data elements that psychiatric facilities must collect and report for each patient stay, which affects both clinical documentation workflows and the accuracy of IPF MS-DRG assignment. The diagnoses assigned to each IPF MS-DRG are updated as of October 1, 2026, using the FY 2027 ICD-10-CM/PCS code sets.
Which Psychiatric Practices Are Affected?
The IPF PPS applies to all psychiatric hospitals and psychiatric units within acute care hospitals that are certified by Medicare as inpatient psychiatric facilities. This includes freestanding psychiatric hospitals, psychiatric distinct part units in general hospitals, and any facility billing under the IPF PPS. Outpatient psychiatric practices billing under the Physician Fee Schedule are not directly affected by the IPF PPS, though they should be aware of the parallel October 2026 billing changes that affect outpatient coding. For outpatient psychiatry billing changes, see our coverage of the 2027 collaborative care billing updates.
Partial Hospitalization Programs (PHPs) operated by Community Mental Health Centers (CMHCs) are also affected. CMS updated the PHP per diem payment rates for both hospital-based PHPs (paid under the OPPS) and CMHC-based PHPs, which continue to receive 40 percent of the hospital-based PHP rate. CMHCs billing Medicare for PHP services must use the updated rates for services furnished on or after October 1, 2026.
Providers often come to us after discovering that their billing system was not updated with the new fiscal year rates, and the first indication was a payment discrepancy on a Medicare remittance. For IPF facilities, the rate update affects every claim with a discharge date on or after October 1, 2026. If your system still carries FY 2026 rates, every claim processed since October 1 may reflect incorrect expected reimbursement.
How Does the IPF PPS Update Affect Reimbursement?
The practical impact of the FY 2027 IPF PPS rate update depends on the facility’s case mix, geographic location, and the volume of ECT and outlier cases it handles. The market basket increase raises the per diem base rate, which means slightly higher reimbursement per day for a standard psychiatric admission. However, the productivity adjustment partially offsets the increase, so the net gain is modest.
| Payment Element | FY 2026 Rate | FY 2027 Rate | Change |
| ECT per treatment | $673.85 | $675.13 | +$1.28 per treatment |
| Market basket update | Prior year factor | Updated with productivity adj. | Net positive, partially offset |
| CMHC PHP rate | 40% of hospital PHP rate | 40% of updated hospital PHP rate | Increases proportionally |
| Outlier threshold | FY 2026 calculation | Recalculated with FY 2027 data | Varies by facility |
| ICD-10 code assignments | FY 2026 code set | FY 2027 code set (Oct 1, 2026) | 190 new codes, 30 deleted |
For facilities that perform a high volume of ECT procedures, the $1.28 per-treatment increase translates to a measurable annual gain. A facility performing 500 ECT treatments per year gains approximately $640 in additional reimbursement from the ECT rate change alone. The per diem increase has a larger total dollar impact because it applies to every covered day, but the exact amount depends on the facility’s case mix index and wage index adjustment.
One question we hear constantly from practice managers at psychiatric facilities is whether the ICD-10 code update affects their MS-DRG assignments. The answer is yes. CMS updates the diagnoses assigned to each IPF MS-DRG using the FY 2027 ICD-10-CM/PCS code sets effective October 1, 2026. A deleted or reassigned code can shift a patient into a different MS-DRG, which changes the per diem payment. For broader context on how ICD-10 code changes affect psychiatry billing, see our guide to CPT code 96127 for behavioral health assessment billing.
Steps to Update Your Facility Billing
Psychiatric facilities and billing teams should complete the following steps immediately to ensure FY 2027 rates are applied correctly to all claims with discharge dates on or after October 1, 2026.
- Confirm your billing system has loaded the FY 2027 IPF PPS rate tables. Verify that the per diem base rate, ECT rate, and outlier threshold reflect the October 1, 2026, update.
- Update your ICD-10-CM/PCS code libraries to the FY 2027 code set. Deleted codes used in IPF MS-DRG assignment will produce incorrect grouping if they remain in the system.
- Review the new patient assessment instrument requirements. Confirm that clinical documentation workflows capture the updated data elements CMS finalized in the rule.
- Recalculate expected reimbursement for ECT cases using the $675.13 per-treatment rate. Update any internal tracking or revenue forecasting models accordingly.
- Verify PHP rates if your facility or CMHC operates a partial hospitalization program. Hospital-based PHPs should reflect the updated OPPS rate, and CMHC-based PHPs should apply 40 percent of that rate.
- Monitor remittances for the first 30 days after October 1 to catch any payment discrepancies between expected and actual reimbursement. Flag any claim where the payment does not match the FY 2027 rate table.
If your psychiatric facility billing team is not equipped to manage the annual IPF PPS rate transition, ICD-10 code updates, and patient assessment changes simultaneously, a specialized billing partner handles all three as part of the standard service.
Common Mistakes After Rate Updates
The most common mistake after an IPF PPS rate update is not updating the billing system’s rate tables before submitting claims with post-October discharge dates. The billing software does not automatically download CMS rate files. The update must be loaded manually or by the billing company, and claims submitted before the update is applied will calculate expected reimbursement using outdated rates. The payments will still arrive at the correct FY 2027 amount from Medicare, but the internal records will show a discrepancy that has to be reconciled.
A second mistake is continuing to use deleted ICD-10 codes for IPF MS-DRG assignment after October 1. CMS updates the code assignments for each MS-DRG with the FY 2027 code set, and a deleted code can shift a case into an incorrect DRG. This produces either an underpayment (if the case groups to a lower-weighted DRG) or an overpayment that triggers a post-payment audit. For outpatient psychiatry practices managing related billing changes, see our coverage of the 2027 Medicare payment changes for psychiatry billing.
Across the billing companies we vet, the ones that handle IPF transitions smoothly share a common process: they load the rate tables before October 1, run a test batch of claims against the new rates, and monitor remittances daily for the first two weeks. Facilities without that process in place discover the discrepancies reactively, after payments have already posted with mismatched internal expectations.
In-House vs. Outsourced IPF Billing
Managing the annual IPF PPS transition in-house requires a billing team that tracks CMS rule releases, downloads and loads rate tables, updates ICD-10 code libraries, and reconfigures the patient assessment instrument in the EHR. For facilities with a dedicated compliance and billing department, this is standard operating procedure.
For smaller psychiatric facilities or units within general hospitals where the psychiatric billing team is one or two people, the annual transition competes with every other October billing change: the ICD-10-CM/PCS code update, the OPPS update, the HCPCS quarterly update, and any payer-specific policy changes that take effect at the start of the federal fiscal year. In our experience matching providers with billing partners, the facilities that outsource their psychiatric billing to a company specializing in behavioral health are the ones that navigate October transitions without revenue disruption.
If your facility’s billing operation struggled with the October 1, 2026, transition, or if you are unsure whether the FY 2027 rates are loading correctly in your system, getting matched with a billing company that specializes in psychiatric facility billing is the fastest way to close the gap and prevent revenue loss.
Frequently Asked Questions
The FY 2027 IPF PPS rates took effect on October 1, 2026, and apply to all Medicare discharges from inpatient psychiatric facilities occurring through September 30, 2027. CMS finalized the rule (CMS-1847-F) on July 29, 2026, and published a technical correction on October 1.
The FY 2027 ECT payment per treatment is $675.13, up from $673.85 in FY 2026. ECT is a separately payable service under the IPF PPS, and the rate is updated annually using the same market basket adjustment applied to the per diem base rate.
No. The IPF PPS applies only to inpatient psychiatric facilities and psychiatric units within acute care hospitals. Outpatient psychiatry practices are billed under the Medicare Physician Fee Schedule, which follows a separate annual update cycle with its own rate changes.
CMHCs operating Partial Hospitalization Programs receive payment at 40 percent of the hospital-based PHP rate. When CMS updates the hospital PHP rate under the OPPS, the CMHC rate increases proportionally. Both rates were updated effective October 1, 2026.
Yes. CMS updates the diagnoses assigned to each IPF MS-DRG using the FY 2027 ICD-10-CM/PCS code sets. Any deleted, added, or reassigned code can change which MS-DRG a case groups into, which affects the per diem payment. Facilities should verify their code libraries reflect the October 1, 2026, update.
The FY 2027 IPF PPS rate tables, including the per diem base rate, ECT rate, wage index values, and outlier thresholds, are available on the CMS Inpatient Psychiatric Facility PPS page. The Federal Register final rule (CMS-1847-F) and correction document (2026-20134) contain the full regulatory text.
Next Steps
- Verify that your billing system reflects the FY 2027 IPF PPS rate tables for all claims with discharge dates on or after October 1, 2026.
- For outpatient psychiatry billing changes also taking effect this quarter, read our coverage of 2027 collaborative care billing updates and the 2027 Medicare payment changes for psychiatry.
- For behavioral health assessment coding, see our guide to CPT code 96127 billing.
- If your psychiatric facility or CMHC needs a billing partner that handles rate transitions, ICD-10 updates, and patient assessment changes as part of the standard service, request a free quote below.
Stop losing revenue to missed rate updates and outdated code tables. Get matched with billing companies that specialize in psychiatric facility billing and handle every October transition before it affects your claims.
