Home Health Agencies: Information on the Outcome and Assessment Information Set (OASIS)

Effective January 1, 2025

As required by the home health (HH) Conditions of Participation (COP), an OASIS privacy notice must be provided to all patients for whom the OASIS data is collected, regardless of payer. Home health agencies (HHAs) should provide patients with the CMS Privacy Act Statement and Attachment A Statement of Patient Privacy Rights. These forms are located on the HHA Center Webpage, OASIS section (ZIP).

Effective July 1, 2025

HHA will be required to collect and submit OASIS data for all patients with any pay source except for those that are exempt from OASIS data collection and who begin receiving HH care services with an OASIS SOC M0090 date on or after July 1, 2025.

Exemptions: Patients under the age of 18, those receiving maternity services, and those receiving only personal care, housekeeping, and/or chore services.

See Transition to All-Payer OASIS Data Collection and Submission fact sheet (PDF) for more information.

Find resources and details on the Outcome and Assessment Information Set (OASIS). This information must be collected for adult Medicare and Medicaid patients receiving skilled services. It doesn't apply to patients receiving services for pre- or postnatal conditions.

Note: Patients receiving only personal care, homemaker, and chore services are excluded since those are not skilled services.

Learn about OASIS from CMS (Centers for Medicare & Medicaid Services):

Additional resources

Find more information on OASIS from CMS and elsewhere, including answers to FAQs (frequently asked questions).

Contact us

Questions? Email dhsdqamdsoasis@dhs.wisconsin.gov.

  • Heather Newton, OASIS education coordinator, can answer questions about interpretation or intended use.
  • Emily Virnig, OASIS automation coordinator, can answer technical or automation questions.

Patient names and other protected health information (PHI) should only be sent to individuals authorized to receive that information, so care must be taken to ensure the email is addressed correctly. Sending an email containing PHI to an incorrect recipient would be an unauthorized disclosure and a violation of HIPAA. We strongly recommend that you do not include PHI in an email. You may include the resident or assessment identification number.

Note: Patients receiving only personal care, homemaker, and chore services are excluded since those are not skilled services.

Last revised April 7, 2025