What Credentialing Is and Why It Impacts When You Get Paid

This article is for anyone involved in setting up or managing a practice — including practice owners, practice managers, office administrators, and front desk staff. If you're a new provider launching your practice or an established practice adding a new provider or location, this applies to you.

Credentialing (sometimes called provider enrollment) is how insurance companies vet providers before agreeing to pay for their services. Payers want to confirm that a provider is who they say they are, that their licenses and certifications are current and valid, and that they meet the payer's standards for participation in their network.

The process typically involves submitting an application along with supporting documentation — things like your medical license, DEA certificate, malpractice insurance, and work history. Each payer has their own application, timeline, and requirements.

Once approved, you'll receive an effective date — the date from which the payer will process and pay your claims.

This is where credentialing gets personal for your practice finances.

You cannot bill most insurance payers until you are credentialed with them.

If a patient with insurance comes in before your credentialing is complete, you have a few options — but none of them are as straightforward as simply billing the payer. In most cases:

• Claims submitted before your effective date will be denied
• You may need to hold claims until credentialing is finalized
• In some situations, retroactive billing is possible — but only within specific timeframes and under certain conditions

For a new practice, this means there can be a gap between when you see your first patient and when you receive your first insurance payment. Understanding this timeline upfront is one of the most important things you can do to protect your cash flow at launch.

For established practices adding a new provider or location, the same rules apply — existing credentialing does not automatically transfer. Each new provider and, in some cases, each new location must be credentialed separately.

Duet manages the credentialing process on your behalf. That means we handle application submissions, payer follow-up, and status tracking — so you don't have to navigate payer portals or sit on hold with insurance companies.

What we need from you: timely, accurate documentation. Missing or outdated documents are one of the most common reasons credentialing gets delayed, so responding quickly when we request information makes a real difference in your timeline.

You can always reach out to your Duet credentialing contact if you have questions about where things stand or what's needed next.

Does credentialing expire?

Yes. Payers typically require re-credentialing every 2–3 years. Your licenses, insurance, and other credentials also have their own renewal cycles that must stay current.

If I'm already credentialed with a payer at another practice, do I need to re-credential?

Generally, yes. Credentialing is tied to a specific Tax ID (TIN) and location. Moving to a new group or opening your own practice typically requires a new enrollment.

• What Your Practice Needs to Provide — and When
• Payer Enrollment Timelines: What to Expect by Payer Type
• Billing During the Gap: Retro Billing and Supervising Provider Options
• How to Flag Credentialing Blockers Early