Outcome Measures
Outcome measures capture how a patient's health status changed over the course of home health care, typically between start of care and discharge. In home health they are calculated from OASIS assessments or Medicare claims, risk-adjusted for patient characteristics, and used in public reporting on Care Compare, star ratings, and the Home Health Value-Based Purchasing model.
Outcome measures vs. process measures
Process measures ask whether the agency did the right things, such as starting care on time. Outcome measures ask whether the patient got better, stayed out of the hospital, or returned safely to the community. Both appear in home health quality programs, but outcomes carry more weight in payment and public perception because they represent results rather than activity. The tradeoff is that outcomes are harder to attribute: they depend on patient condition, caregiver support, and events outside the agency's control, which is why CMS risk-adjusts them before comparing agencies.
The main home health outcome measures
Home health outcome measures fall into two families:
- OASIS-based functional outcomes, such as improvement in ambulation, dyspnea, and self-care activities like bathing and dressing, measured by comparing start-of-care or resumption-of-care responses with discharge responses
- Claims-based utilization outcomes, such as potentially preventable hospitalization during the home health stay and discharge to community, calculated from Medicare claims without any extra submission by the agency
Under the HHVBP CY2026 measure set, these two families each carry 40% of the Total Performance Score, making outcomes the dominant driver of payment adjustment.
How risk adjustment shapes your scores
Raw outcome rates would punish agencies that admit sicker, more functionally impaired patients. CMS therefore builds statistical models that predict each patient's expected outcome from baseline OASIS data and claims history, then scores agencies on observed performance relative to expected. This is why baseline documentation accuracy is an outcomes issue, not just a compliance issue: if clinicians overstate a patient's baseline function at start of care, the risk model expects more and the measured improvement shrinks. Accurate, specific baseline assessment is the single highest-leverage documentation behavior for outcome performance.
How to move outcome scores
Improving outcomes is a two-front effort. On the documentation front, train clinicians on OASIS conventions, audit start-of-care assessments for accuracy, and reconcile discharge responses against the clinical record. On the care delivery front, involve therapy early for functionally impaired patients, set measurable functional goals in the plan of care, front-load visits for high-risk patients, and treat every unplanned hospitalization as a case review. Agencies that only work one front tend to plateau.
Frequently asked questions
Are home health outcome measures risk-adjusted?
Yes. CMS adjusts OASIS-based and claims-based outcome measures for patient characteristics such as baseline function, diagnoses, and prior healthcare use, so agencies are scored on performance relative to expected outcomes rather than raw rates.
Where does the data for outcome measures come from?
OASIS-based outcomes come from the assessments agencies submit through iQIES at start of care, resumption of care, and discharge. Claims-based outcomes are calculated by CMS from Medicare fee-for-service claims, including hospital claims, with no separate agency submission.
How long does it take for improved care to show up in reported outcomes?
Several quarters. Public measures use rolling data windows, often 12 months or more for OASIS measures and longer for claims measures, so a genuine improvement blends in gradually with each quarterly refresh of Care Compare.