Practice owners often hear “credentialing,” “payer enrollment” and “contracting” used as if they mean the same thing. They are related, but they are separate steps with different owners, documents and outcomes. Confusing them is a common reason a provider is “credentialed” yet claims are still denied.
This article explains each step in plain terms, how they fit together and what a practice owner should track.
Key takeaways
- Credentialing answers “is this provider qualified?”
- Payer enrollment answers “is this provider set up to bill this payer?”
- Contracting answers “on what terms, and at what rates, will this payer pay us?”
- A provider can be credentialed and still not be billable if enrollment or contracting is incomplete.
Credentialing: Verifying Qualifications
Credentialing is the verification of a provider’s qualifications: licenses, education, training, board certification, DEA registration, malpractice coverage, work history and sanctions. Health plans, hospitals and other organizations credential providers before allowing them into their networks or facilities, and they repeat the process periodically (recredentialing).
The provider’s information is often supplied through the CAQH Provider Data Portal, and the payer or a credentials verification organization checks it against primary sources.
Payer Enrollment: Getting Set Up to Bill
Enrollment is the administrative process of adding a provider to a payer’s systems so that claims for their services can be processed. It links the provider’s NPI to the practice’s tax ID and locations, and assigns any payer-specific provider identifiers.
- Medicare: enrollment through PECOS or the CMS-855 forms, including reassigning the provider’s benefits to the group so the group can bill.
- Medicaid: enrollment with the state Medicaid program, and often separately with each Medicaid managed care plan.
- Commercial payers: each plan’s own application, frequently combined with its credentialing process.
Contracting: Agreeing the Terms
Contracting is the agreement between the practice (or provider) and a payer that sets out reimbursement rates, covered services, claims rules and obligations on both sides. For a new group, contracting usually comes first or alongside the first provider’s enrollment; later providers are often added to the existing group contract.
Contracts deserve careful review. Fee schedules, timely filing limits, termination terms and policies incorporated by reference all affect revenue. Many practices involve an attorney or experienced advisor in negotiation.
How the Three Fit Together
| Step | Main question | Typical output |
|---|---|---|
| Credentialing | Is the provider qualified? | Approval by the payer’s credentialing committee |
| Payer enrollment | Can this provider bill under this practice? | Provider ID, effective date, linked locations |
| Contracting | On what terms will the payer pay? | Signed agreement and fee schedule |
In practice, commercial payers often run credentialing and enrollment as one application, while government programs separate enrollment from contracting entirely. That is why a single status such as “credentialed” can hide the fact that one step is still open.
Why the Difference Matters
- Denied claims: claims submitted before the effective date, or for a location that was not linked, are commonly denied.
- Out-of-network payments: a provider credentialed but not added to the group contract may be treated as out of network.
- Directory listings: patients may not find the provider until enrollment is complete.
- Planning: start dates and schedules should follow the slowest of the three steps for each payer.
What Practice Owners Should Track
For every provider and payer combination, track:
- Credentialing status and approval date
- Enrollment status, provider ID and effective date
- Which locations and tax IDs are linked
- Contract status and whether the provider is added to the group agreement
- Next re-attestation, revalidation and recredentialing dates
A shared tracker that shows all five items per payer prevents most surprises. For the bigger picture, read our provider credentialing guide.
Not sure which steps are still open? Share your providers and payers, and we will help you map what remains.
Learn more about our provider credentialing support.
Frequently Asked Questions
01Is credentialing the same as enrollment?
No. Credentialing verifies qualifications; enrollment sets the provider up in a payer’s systems to submit claims. Some payers combine them in one application, which is why the terms are often confused.
02Does Medicare require credentialing?
Medicare requires enrollment, through PECOS or the CMS-855 forms, and it verifies information such as licensure and exclusions as part of that process. Medicare Advantage plans run their own credentialing.
03Do we need a contract with every payer?
To be in network with a commercial payer, the practice generally needs an agreement with that payer. Government programs work through enrollment and program rules rather than negotiated contracts, although Medicaid and Medicare Advantage managed care plans have their own agreements.
04Who should negotiate payer contracts?
The practice owner or administrator, ideally with an attorney or advisor experienced in payer contracts. Credentialing staff typically handle the applications, not the commercial terms.
05What happens if a provider changes practices?
Their enrollment usually needs to be updated or reassigned to the new group, and the new practice’s contracts and locations need to be linked. Credentialing may carry over, but each payer’s rules differ.
