What certification does and does not tell you
A Medicare-certified agency has been surveyed and found to meet the federal Conditions of Participation, which is what allows it to be paid by Medicare. That is a genuine floor — an uncertified agency has not cleared it — but it is a threshold, not a grade, and every agency in the CMS dataset has cleared the same one.
So certification never differentiates between two agencies you are choosing among. It only tells you whether an agency belongs in the comparison at all.
Confirm it is current
Certification status changes, and any dataset is a snapshot. Every agency page here carries the agency's CMS Certification Number (CCN) — the unique identifier CMS assigns to a certified provider — and the CCN is what you use to confirm current status on Medicare's official Care Compare.
This matters most for agencies that are new, recently changed ownership, or were recommended informally rather than through a discharge planner. If the referral did not come through a hospital, verifying certification is the first step, not an afterthought.
Read the record, including its gaps
If CMS reports a quality-of-patient-care star, read it as a shortlisting device rather than a verdict, and note that it is published in half-star steps — a 3.5 is a real step below a 4.
Then look at how many of the quality measures CMS actually fills in for that agency, and read the categories that match the reason for care: mobility and timely start of care for someone recovering from surgery, hospital-visit measures for someone with a chronic condition. Check the denominator on any measure before weighing it; a percentage from a dozen episodes carries little weight.
Where CMS reports nothing, the page shows CMS's own explanation rather than a blank or a zero. A missing measure is a gap in the public record, not a finding against the agency.
When the record is thin or empty
About a quarter of Medicare-certified agencies nationally have neither a star nor a single reported measure, and in some states the share is far higher. That means for a substantial number of agencies, the public data cannot help you differentiate — and pretending otherwise is worse than admitting it.
In that situation the weight shifts to sources the data cannot replace: what the discharge planner or referring clinician knows about the agency, how long it has operated, and what the agency itself says when asked directly. An agency with no record is not disqualified; it is unmeasured, and you compensate by asking more.
Our research on home-health data availability by state shows how likely you are to run into this where you are searching.
The questions that decide it
Can the agency actually take this referral, starting when care is needed? Agencies decline when at capacity, and no public dataset records availability. This single question resolves more cases than any rating.
Which clinician would visit, how often, and what happens if that person is unavailable? Care is delivered by an individual in a home, and agency-level measures average across everyone.
Does the agency provide the specific services in the discharge plan — skilled nursing, physical or occupational therapy, speech pathology, medical social services, home health aide — and can it cover evenings or weekends if needed?
How does it communicate with the family and the prescribing clinician, and who do you call when something changes at night?