What Does It Mean to Be Medicare Certified?

A Medicare-certified provider is a hospital, facility, or supplier that has met federal health and safety standards set by the Centers for Medicare & Medicaid Services (CMS) and is approved to bill Medicare for covered services. In plain terms, if you’re asking what it means to be Medicare certified, it means Medicare has cleared that provider to take Medicare patients and get paid for their care. Without certification, Medicare generally won’t pay anything toward your bill at that facility, and you could be left owing the full cost yourself.¹

What Certification Actually Is

To be certified, a provider has to comply with what CMS calls “conditions of participation,” or for certain supplier types, “conditions for coverage.” These are federal rules covering staffing, patient rights, infection control, emergency preparedness, and the physical environment where care is delivered. Hospital conditions live in Title 42 of the Code of Federal Regulations, Part 482.¹ Home health agencies follow a separate set under Part 484.²

Certification is federal, and it’s different from a state license. A hospital or clinic typically needs both: a state license to legally operate, and Medicare certification to bill the Medicare program. State health departments handle licensing under their own rules; CMS handles the federal side.

Providers pursue certification voluntarily. Nothing forces a hospital to participate in Medicare. But because Medicare covers roughly 67 million people, most providers can’t afford to turn that patient base away, so nearly every general hospital in the country is certified.

Who Gets Certified

Medicare certification covers a wide range of provider types, each held to standards tailored to the care they deliver:

Hospitals, including acute care, critical access, psychiatric, and inpatient rehabilitation facilities³
Skilled nursing facilities
Home health agencies
Hospice programs
Dialysis (end-stage renal disease) facilities, ambulatory surgical centers, rural health clinics, rural emergency hospitals, clinical laboratories, and comprehensive outpatient rehabilitation facilities⁴
Suppliers of durable medical equipment, prosthetics, orthotics, and supplies (DMEPOS), such as wheelchairs and oxygen equipment⁵

Two Paths to Certification

There are two ways a provider can prove it meets the federal standards. The first is a survey conducted by a State Survey Agency, which inspects the facility on behalf of CMS under Section 1864 of the Social Security Act.⁶ The surveyor reviews patient records, observes care, interviews staff, and inspects the building.⁷

The second path is “deemed status.” Federal law lets CMS treat providers accredited by an approved national accrediting organization as having met the conditions of participation, provided that the accrediting body’s standards match or exceed Medicare’s.⁸ Approved accrediting organizations include The Joint Commission, DNV Healthcare, the Accreditation Commission for Health Care, and the Community Health Accreditation Partner, among others.⁹ Most large hospitals go this route. CMS still reserves the right to run its own validation surveys to check that the accrediting process is working.

Either way, the destination is the same: a CMS Certification Number and the ability to bill Medicare.

Why Certification Matters for What You Pay

Certification is the baseline requirement for Medicare to pay anything. If a provider isn’t certified, Medicare generally won’t cover the care, and you’d be responsible for the full bill (narrow emergency exceptions aside).

But certification alone doesn’t tell you what you’ll owe out of pocket. Among certified providers, there are three categories that directly affect your costs:

Participating providers accept Medicare’s approved amount as full payment. After you meet the Part B deductible, you pay the standard 20% coinsurance, and that’s it.
Non-participating providers are still Medicare-certified but haven’t agreed to always accept the Medicare-approved amount. They can charge up to 15% above Medicare’s rate, called the “limiting charge.” You could end up owing as much as 35% of the approved amount: your 20% coinsurance plus the 15% excess.
Opt-out providers have left Medicare entirely. They contract privately with patients, Medicare pays nothing, and you’re on the hook for the full bill. This arrangement is most common among certain psychiatrists, dermatologists, and other specialists.

On an expensive procedure, the gap between a participating and a non-participating provider can be significant. Before scheduling, it’s worth confirming not only that the provider is certified but whether they accept assignment.

How to Check Whether a Provider Is Certified

Medicare’s Care Compare tool at medicare.gov lets you search for certified providers by type and location: hospitals, nursing homes, home health agencies, hospice programs, doctors, and more.¹⁰ The tool also displays quality ratings drawn from survey results and patient outcomes, which can help you distinguish between certified providers that just clear the minimum bar and those with stronger records.

You can also call 1-800-MEDICARE (1-800-633-4227) to check whether a specific provider is enrolled and whether they accept assignment. The simplest approach is often to ask the provider’s billing office directly before your appointment. That’s the surest way to get a clear answer about what you’ll owe.

For skilled nursing facilities, survey results must be posted where residents and their families can see them, and CMS publishes survey findings within 90 days of completion.⁶

Certification Isn’t Permanent

A provider has to keep meeting the standards to stay certified. Enrollment must be revalidated every five years, and every three years for DMEPOS suppliers. CMS can also request off-cycle revalidations at any time.¹¹ Between revalidations, providers stay subject to periodic surveys.

CMS can revoke a provider’s Medicare enrollment for reasons that include noncompliance with enrollment requirements, certain felony convictions within the preceding 10 years, false information on the application, no longer being operational, billing for services that couldn’t have been provided (such as claims for a patient who was deceased on the date of service), failing to report ownership or location changes, and failing to pay the application fee at revalidation.¹² If certification is revoked, Medicare stops paying, which is why it’s worth checking a provider’s current status if there’s any doubt.

1
eCFR. 42 CFR Part 482 – Conditions of Participation for Hospitals
2
eCFR. 42 CFR Part 484 – Home Health Services
3
Centers for Medicare & Medicaid Services. Hospitals
4
Centers for Medicare & Medicaid Services. Facilities
5
Centers for Medicare & Medicaid Services. DMEPOS Accreditation
6
Social Security Administration. Social Security Act 1864 – Use of State Agencies to Determine Compliance by Providers of Services With Conditions of Participation
7
Centers for Medicare & Medicaid Services. State Obligations to Survey to the Entirety of Medicare and Medicaid Health and Safety Requirements Under the 1864 Agreement
8
Office of the Law Revision Counsel. 42 US Code 1395bb – Effect of Accreditation
9
Centers for Medicare & Medicaid Services. Accrediting Organization Contacts for Prospective Clients
10
Medicare. Find Healthcare Providers – Compare Care Near You
11
Centers for Medicare & Medicaid Services. Revalidations (Renewing Your Enrollment)
12
eCFR. 42 CFR 424.535 – Revocation of Enrollment in the Medicare Program