ADLs (Activities of Daily Living)

The classic ADL list covers bathing, dressing, grooming, toileting, transferring, ambulation or locomotion, and eating. OASIS captures ADL ability in two places: the M1800-series items, which score the patient's ability to perform grooming, upper and lower body dressing, bathing, toilet transferring, transferring, ambulation, and feeding, and Section GG, which scores self-care and mobility activities on a standardized independence scale used across post-acute settings. The two item families use different response logic, so clinicians need training on both. M items ask about ability considering the patient's current condition, while GG items rate how much help the patient needs to complete the activity.

Under PDGM, responses to designated OASIS items, including the M1800-series ADL items and the hospitalization risk item, determine the functional impairment level of low, medium, or high for each 30-day payment period. Higher impairment means a higher case-mix weight and payment, reflecting the greater resource needs of dependent patients. Accuracy cuts both ways: overscoring dependence inflates payment and creates audit exposure, while underscoring shortchanges the agency and, just as important, caps the improvement the quality measures can ever show, because the baseline was recorded as better than reality.

ADL items feed the improvement measures reported on Care Compare, such as improvement in bathing and ambulation, and the OASIS-based measure domain carries 40% of the Total Performance Score under the expanded HHVBP model. The CY2026 HHVBP measure set includes new bathing and dressing function measures, which raises the stakes on precise ADL assessment at both start of care and discharge. The pattern to avoid is systematic: an agency that habitually scores patients too independent at admission will look flat on improvement measures no matter how good the care actually was.

Score what the patient safely does, not what they say they do or what they could do on a good day. Observe the task where possible: watch the transfer, watch the patient don a shirt. Consider the patient's usual status across the assessment timeframe rather than a single best moment. One clinician completes the OASIS, but CMS guidance allows that clinician to consider input from other agency staff who saw the patient during the assessment period. Documented observations in the visit note should agree with the OASIS scores, because contradictions between the two are a favorite finding in audits and ADR reviews.