What It Takes to Become a Medicare Provider

Becoming a Medicare provider means enrolling your medical practice with the Centers for Medicare & Medicaid Services (CMS) so that you can bill Medicare for services you deliver to beneficiaries. The process requires you to register with the National Provider Enumeration System (NPES), obtain a National Provider Identifier (NPI), and complete the Medicare enrollment process through PECOS (Provider Enrollment, Chain, and Ownership System). The timeline typically runs four to six weeks from submission to approval, though it can extend longer if CMS requests additional documentation.

The specific steps and requirements differ depending on whether you are an individual practitioner, a group practice, a hospital, a durable medical equipment supplier, or another type of healthcare organization. All providers must pass a background check, verify their credentials, and demonstrate they are not excluded from federal healthcare programs. You will also need to decide whether to enroll as a participating provider (who accepts Medicare's approved amount as full payment) or a non-participating provider (who can charge beneficiaries more, within limits).

Key Takeaways

  • You must obtain an NPI from NPES and then submit a Medicare enrollment process through PECOS, which is the official CMS system for all provider registrations.
  • Individual practitioners, group practices, and organizations each follow different enrollment pathways, and you must choose the correct form (CMS-855I for individuals, CMS-855B for groups, CMS-855O for organizations) when you explore.
  • CMS will verify your medical license, check your background, and confirm you are not on the Office of Inspector General (OIG) exclusion list before approval.
  • Participating providers accept Medicare's approved amount as full payment; non-participating providers can charge more but must follow limiting charge rules and notify beneficiaries in advance.
  • After enrollment, you must renew your Medicare provider status every five years and report any changes to your practice ownership, location, or credentials within 30 days.

Getting Your National Provider Identifier (NPI)

Before you can enroll in Medicare, you must obtain an NPI from the National Provider Enumeration System. The NPI is a unique 10-digit number that identifies you to all payers, not just Medicare. You can request an NPI online at the NPPES website (nppes.cms.hhs.gov) at no cost. The process takes about two minutes if you are explore as an individual practitioner; you will need your Social Security number, date of birth, and practice address.

If you are explore on behalf of a group practice or organization, you will need to provide the organization's legal name, Employer Identification Number (EIN), and principal business address. Once you submit your process, NPPES will issue your NPI when ready. You do not need to wait for an NPI before starting your Medicare enrollment process, but you must have one before CMS can process your enrollment.

Completing the Medicare Enrollment process in PECOS

PECOS is the online system where you submit your Medicare enrollment process. You will create a user account, select your provider type, and complete the appropriate CMS form. Individual physicians and practitioners use form CMS-855I; group practices and medical groups use CMS-855B; hospitals, clinics, and other organizations use CMS-855O. Each form requests different information, so selecting the correct one is essential.

The process asks for your NPI, medical license number and state of licensure, practice address, tax identification number, malpractice insurance information, and details about any ownership interests in the practice. You will also declare whether you have ever been excluded from Medicare, Medicaid, or other federal programs, and whether you have any criminal convictions or malpractice judgments. Incomplete or inaccurate applications are a common reason for delays, so review every field before submission.

You can save your process and return to it later, but you must submit it through PECOS to begin the review process. CMS does not accept paper applications or applications submitted by email. If you need help navigating PECOS, CMS offers a provider enrollment support line and online tutorials.

Documentation You Will Need to Provide

CMS will request specific documents to verify the information in your process. Have these ready before you start, as missing documents are the most common reason applications are returned for revision. For individual practitioners, you will need a copy of your medical license (front and back), proof of your malpractice insurance policy, and a government-issued photo ID. If you have a Social Security number, you may also need to provide authorization for CMS to verify it.

Group practices and organizations must provide documentation for each owner and managing employee with a 5 percent or greater ownership stake. This includes their NPI, medical license (if applicable), and a signed attestation that they are not excluded from federal programs. You will also need to submit your group's bylaws or operating agreement, proof of your business registration or incorporation, and a list of all locations where you provide care.

If you are a hospital or other facility, you may need to provide additional documentation such as your state license, accreditation certificates, and proof of your compliance with Conditions of Participation (CoPs). CMS will tell you exactly which documents to submit when you receive a request for information (RFI) during the review process.

Background Checks and Credentialing Verification

CMS conducts a background check on every applicant before approval. This includes a search of the Office of Inspector General (OIG) exclusion list to confirm you have not been barred from participating in federal healthcare programs. You can check the OIG exclusion list yourself at exclusions.oig.hhs.gov before you explore. If you appear on the list, you cannot enroll in Medicare until you are removed.

CMS also verifies your medical license with your state licensing board and may contact your malpractice insurance carrier to confirm your coverage. If there are discrepancies between your process and the information CMS receives from these sources, they will send you an RFI asking you to clarify or correct the information. Responding promptly to an RFI is critical; CMS typically gives you 30 days to respond, and missing the important date can result in denial of your process.

If you have any history of malpractice claims, criminal convictions, or exclusions from other payers, disclose this information in your process. Attempting to hide or misrepresent this information can result in permanent denial and potential fraud investigation.

Choosing Between Participating and Non-Participating Status

When you enroll in Medicare, you must decide whether to be a participating provider or a non-participating provider. This choice affects how much you can charge beneficiaries and how Medicare pays you. A participating provider agrees to accept Medicare's approved amount as full payment for covered services. Medicare pays you 80 percent of the approved amount (after the beneficiary meets their deductible), and the beneficiary is responsible for the remaining 20 percent coinsurance. You cannot bill the beneficiary more than this amount.

A non-participating provider does not sign a participation agreement and can charge beneficiaries more than Medicare's approved amount. However, your charges are limited to 115 percent of the approved amount (called the "limiting charge"). You must notify beneficiaries in writing before providing care that you are non-participating and that they may owe more than they would with a participating provider. Non-participating providers also receive payment directly from beneficiaries in many cases, rather than from Medicare.

Most beneficiaries prefer participating providers because their out-of-pocket costs are lower and more predictable. If you are starting a practice, enrolling as a participating provider often makes it easier to attract Medicare patients. You can change your participation status during your five-year enrollment period, but changes take effect on the first day of the following month.

Timeline and What Happens After Approval

From the time you submit a complete process in PECOS, CMS typically takes four to six weeks to review and approve your enrollment. If CMS needs additional information, they will send you an RFI, which pauses the clock while you respond. Once you receive approval, you will get a Medicare provider number and can begin billing Medicare for services. Your approval letter will specify your effective enrollment date and your participation status.

After enrollment, you must keep your Medicare information current. If you move your practice, change your ownership structure, add or remove a location, or update your medical license, you must report these changes to CMS within 30 days. You can make updates through PECOS. Your Medicare enrollment is valid for five years; CMS will send you a renewal notice about 90 days before your enrollment expires. You must complete the renewal process to continue billing Medicare.

If you fail to renew, your Medicare provider number will be deactivated and you will no longer be able to bill Medicare. Reactivating after deactivation can take longer than the initial enrollment process, so mark your renewal date on your calendar and submit your renewal process well before the important date.

Frequently Asked Questions

Do I need a separate NPI for each location where I practice?

No. As an individual practitioner, you have one NPI that covers all locations where you practice. However, if you are part of a group practice, the group itself has one NPI, and you as an individual also have your own NPI. When you bill Medicare, you report both your individual NPI and the group's NPI so CMS knows which practice to pay.

How long does the background check take?

CMS does not publish a specific timeline for background checks, but they are usually completed within the four- to six-week review period. If CMS finds something that requires clarification, they will send you an RFI, which can add two to four weeks to the process. Checking the OIG exclusion list yourself before you explore can help you identify potential issues early.

Can I bill Medicare while my process is pending?

No. You cannot bill Medicare until your enrollment is approved and your Medicare provider number is activated. If you see Medicare beneficiaries before approval, you cannot submit claims to Medicare. Some practices ask beneficiaries to sign an Advance Beneficiary Notice (ABN) stating they understand Medicare may not cover the service and they agree to pay out of pocket if the claim is denied.

What if my Medicare enrollment process is denied?

CMS will send you a denial letter explaining the reason. Common reasons include incomplete documentation, discrepancies in your credentials, or exclusion from federal programs. You can request reconsideration by submitting additional documentation or clarification within 30 days of the denial. If reconsideration is denied, you can appeal to the CMS Office of Hearings and Appeals, though this process is lengthy.

Do I need to enroll separately with each Medicare Advantage plan?

No. Once you are enrolled in Medicare as a provider, you can bill all Medicare Advantage plans that operate in your area. However, some Medicare Advantage plans have their own credentialing requirements or may require you to sign a separate contract. Contact the plans directly to ask about their specific requirements.