IPPS FY2027 Final Rule: MS-DRG Weights and LTCH Rates — Update Systems by October 1

FR-2026-15833, the FY2027 Hospital Inpatient Prospective Payment System and Long-Term Care Hospital Prospective Payment System Final Rule, was published in the Federal Register on August 4, 2026, with an effective date of October 1, 2026. This is a Final Rule affecting acute care hospitals paid under IPPS and long-term care hospitals paid under LTCH PPS. The single most critical compliance implication: chargemasters, groupers, and claims editing systems that carry MS-DRG relative weights and wage index values must be updated before October 1 — claims processed on or after that date under FY2026 weights will calculate incorrect reimbursement.

Regulatory Background CMS issues the IPPS Final Rule annually under statutory authority to update payment rates for the upcoming fiscal year beginning October 1. The FY2027 rulemaking cycle incorporates updated cost report data, MS-DRG recalibration based on MedPAR claims, revised wage index calculations, and any quality program policy changes finalized after the proposed rule comment period. The rule also updates LTCH PPS standard federal payment rates and adjusts requirements for quality reporting programs including the Inpatient Quality Reporting (IQR) program and the Hospital Value-Based Purchasing (VBP) program.