OASIS (the Outcome and Assessment Information Set) is the standardized data collection tool that home health agencies use at key points in a patient's care: Start of Care, Resumption of Care, every 60 days (recertification), Transfer to an inpatient facility, and Discharge.
The data collected through OASIS drives three things that matter directly to your agency's revenue:
- PDGM clinical grouping and payment: OASIS data determines which payment group a patient is assigned to under the Patient-Driven Groupings Model
- LUPA threshold: whether a patient's case qualifies for the full episode payment or triggers a per-visit LUPA adjustment
- HHVBP scoring: OASIS-based outcome measures now make up 40% of the HHVBP scorecard for larger-volume agencies
OASIS-E2 is the latest version of this instrument, effective April 1, 2026.
OASIS Versions: A Brief History
Understanding where OASIS-E2 fits helps explain why the changes are mostly incremental.
- OASIS-E (January 1, 2023): significant update adding new functional assessment items aligned with the CMS Quality Reporting Program
- OASIS-E1 (January 1, 2025): minor revisions to item guidance
- OASIS-E2 (April 1, 2026): targeted item updates and structural revisions
Each version updates specific items based on new CMS quality measurement priorities, technical corrections, and alignment with other reporting frameworks. OASIS-E2 is a focused update, not a structural overhaul.
What Changed in OASIS-E2
- Gender item reclassified: Item M0069_PAT_GENDER replaced by A0810. Same data, structural reclassification to align with updated federal standards.
- Race and ethnicity items updated: Item A1255 replaces the A1250 items to align with federal standardization for race and ethnicity data collection.
- RFA 03 now includes additional items: Resumption of Care assessments have additional required items. Clinicians completing ROC assessments should review the updated instrument.
- Dash allowed for D0150 frequency items: A dash (-) is now an accepted response when the mood assessment item doesn't apply.
- COVID-19 vaccination item removed: Item O0350 has been removed. Any valid response is acceptable for submissions before the EMR update takes effect, with no quality measure implications.
- Four SDOH items removed before collection began: One Living Situation item, two Food items, and one Utilities item were removed before any data collection began.
What Didn't Change
The structure of OASIS assessment timepoints is the same. The core clinical domains (wound status, medication management, functional status, cognitive function, pain) are unchanged. The PDGM grouping logic is still based on primary diagnosis, comorbidity groups, and clinical/functional severity.
The biggest changes in 2026 affect how OASIS data is used (new HHVBP weights, all-payer submission requirements) more than what's collected.
The All-Payer OASIS Requirement
Effective July 1, 2025, CMS formally required OASIS data collection and submission for all skilled patients, regardless of payer. This was piloted and then codified in the 2026 Final Rule.
If your agency is still collecting OASIS only for Medicare patients, that is a compliance gap. Every skilled patient, regardless of whether they're on Medicare, Medicaid, commercial insurance, or private pay - now requires an OASIS at the applicable time points (with limited exceptions for patients under 18, maternity patients, and patients receiving only personal care services).
What Your Agency Needs to Confirm This Week
- Has your EMR vendor deployed the OASIS-E2 instrument? The update should have happened by April 1. If you're not sure, contact your vendor directly.
- Are the new A0810 and A1255 items mapped correctly? Ask your vendor to confirm the item mapping is complete before your next SOC assessment.
- Have your clinicians been briefed on the removed COVID item? If they're completing assessments from habit, they may still be looking for O0350.
- Is all-payer OASIS collection in place for all branches? Confirm this is being applied consistently across payer types and locations.
- Has the iQIES legacy data entry UI been removed from your team's workflow? CMS discontinued the legacy front-end on April 1. Manual assessment entry through iQIES is no longer available.
WorldView supports home health agencies in maintaining documentation integrity across the patient record, including accurate OASIS documentation that protects PDGM payments and HHVBP performance. Schedule a demo to see how it supports your clinical workflow.
