Skilled Nursing and therapy to maintain an individual’s condition are covered by Medicare. Improvement is not required. This applies to Medicare Advantage as well as traditional Medicare.
A CMS wrote on 2/13/2024:
“The Centers for Medicare & Medicaid Services (CMS) reminds MAOs [Medicare Advantage Organizations] of the Jimmo Settlement Agreement (january 2013), which clarified that the Medicare program covers skilled nursing care and skilled therapy services under Medicare’s skilled nursing facility, home health, and outpatient therapy benefits when a beneficiary needs skilled care in order to maintain function or prevent or slow decline or deterioration (provided all other criteria are met).”
See the resources at
at https://www.cms.gov/medicare/settlements/jimmo