Skip to main content
U.S. flag

An official website of the United States government

Return to Search

Home Health Quality Reporting Program - OASIS User Manuals

Guidance for the OASIS User Manuals under the Home Health Quality Reporting Program.

Final

Issued by: Centers for Medicare & Medicaid Services (CMS)

Issue Date: January 10, 2020

May 3, 2024

The draft Guidance Manual for the OASIS-E1 version of the OASIS data set, effective January 1, 2025, is available in the Downloads section below.

November 7, 2023

NOW AVAILABLE: Updated OASIS-E Manual

The 2024 update to the OASIS-E Manual, and the associated Change Table, are available in the Downloads section on the OASIS Users Manuals page. There are no changes to the OASIS-E instrument. The changes incorporate guidance into the manual and Q&As from the CMS Quarterly Q&As dated July 2022 through October 2023.

December 14, 2022

NOW AVAILABLE: Final OASIS-E Manual

The final OASIS-E Manual, effective January 1, 2023, is available in the Downloads section below. A log of changes since the last posting is also available.

Please note that the effective date for OASIS-E is January 1, 2023. The version of OASIS that should be collected will be based on the M0090 – Date Assessment Completed. The M0090 date is the last date that information used to complete the comprehensive assessment and determine OASIS coding was gathered by the assessing clinician and documentation of the specific responses was completed.

The Centers for Medicare & Medicaid Services (CMS) wants to make clear that with this transition to OASIS-E, there is no need for the use of artificial M0090 dates. All assessments with a M0090 - Date Assessment Completed on or before December 31, 2022, including the last 5 days of 2022 must be completed with OASIS-D1.  This is true even when the first day of the new certification period is on or after January 1, 2023.

All assessments with a M0090 - Date Assessment Completed on or after January 1, 2023, must be completed with OASIS-E. This is true even when the assessment was initiated in 2022.

December 6, 2022

The final OASIS-E instrument, effective January 1, 2023, is available in the Downloads section on the OASIS Data Sets page. A log of changes from the draft to final instrument and Manual is also available in the Downloads section on the OASIS Users Manuals page. 

HHS is committed to making its websites and documents accessible to the widest possible audience, including individuals with disabilities. We are in the process of retroactively making some documents accessible. If you need assistance accessing an accessible version of this document, please reach out to the guidance@hhs.gov.

DISCLAIMER: The contents of this database lack the force and effect of law, except as authorized by law (including Medicare Advantage Rate Announcements and Advance Notices) or as specifically incorporated into a contract. The Department may not cite, use, or rely on any guidance that is not posted on the guidance repository, except to establish historical facts.