IRF PPS FY2027 Final Rule: Audit Therapy Timelines and CMG Weights Now
FR-2026-15652 finalizes IRF PPS FY2027 rates effective October 1, 2026, with therapy required within 36 hours of admission midnight.
Action required by
October 1, 2026
Review the Action Required section below and ensure your team has completed all compliance steps before this date.
The Centers for Medicare & Medicaid Services has issued FR-2026-15652, the Inpatient Rehabilitation Facility Prospective Payment System Final Rule for Federal Fiscal Year 2027, effective October 1, 2026. This is a Final Rule governing the IRF PPS payment system. The single most critical compliance implication: IRF admission workflows must be restructured immediately to document therapy initiation within 36 hours of midnight on the day of admission, or facilities risk medical necessity denials on post-payment review.
Regulatory Background
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Quick answers
Does the 36-hour therapy initiation requirement under FR-2026-15652 mean 36 hours from the clock time of admission, or from midnight?
Under FR-2026-15652, the 36-hour window runs from midnight on the day of admission — not from the patient's physical arrival time. Confirm the exact midnight reference and resulting deadline against the rule text before applying it to a specific admission; the source record does not state a worked example. Document the therapy start as a discrete timestamp in the medical record; narrative references to therapy occurring 'on day two' are insufficient for audit purposes.
If our IRF is a rural facility, what payment rate do we use for FY2027 claims now that the rural adjustment phaseout is complete?
Effective October 1, 2026 under FR-2026-15652, the rural adjustment add-on is fully phased out. Rural IRFs bill at the standard CMG-based rate with no rural add-on applied. Refer to the FY2027 rate tables in the full Federal Register document for the specific payment amounts — do not apply any residual rural percentage from prior-year calculations, as doing so will result in overpayment claims.
How does the FY2027 CMG weight update in FR-2026-15652 affect claims already in the billing queue for October discharges?
Any IRF discharge with a discharge date on or after October 1, 2026 must be grouped and priced using the FY2027 CMG weights. Claims processed through an encoder still running FY2026 weights will produce incorrect expected payment amounts. Confirm your grouper vendor has pushed the FY2027 weight tables before October 1 and run a test claim to verify the correct weight is being applied before live claims are submitted.
Content summarized from publicly available federal publications including CMS, MAC contractors, and the Federal Register. CLV Intelligence is not affiliated with or endorsed by any government agency. This is not legal or medical advice.