Until a provider is credentialed with a payer, that payer's members either pay out of network or go elsewhere. For a new practice, credentialing usually decides the opening date. For an established one, it decides how quickly a new hire starts generating revenue. Here is how it works, in order.
Credentialing vs. contracting vs. enrollment
- Credentialing is the payer verifying who you are: education, training, licenses, board certification, work history, malpractice and sanctions.
- Contracting is the agreement itself: your reimbursement rates and terms.
- Enrollment is the general term for getting set up to bill a payer, and is used especially for Medicare and Medicaid.
You can be credentialed and still not able to bill if the contract isn't signed and loaded. Track both.
Step 1: Gather your documents once
Every payer asks for roughly the same set, so collect it before the first application:
- State license(s), plus DEA and state controlled substance registrations if you prescribe
- Individual NPI (Type 1), and a group NPI (Type 2) if you bill as a practice
- Board certification, or national certification for NPs and PAs
- Malpractice insurance face sheet and claims history
- CV with month and year for every position, with gaps over six months explained
- Education and training certificates
- Practice tax ID (EIN), W-9, practice addresses and hours
- Collaborative or supervisory agreement, where your state requires one
Step 2: Complete CAQH ProView
Most commercial payers pull your data from CAQH ProView instead of a paper application. Complete every section, upload current documents, authorize each payer to view your profile, and re-attest every 120 days. A lapsed attestation quietly stalls applications.
Step 3: Choose payers strategically
Apply first to the payers your future patients actually carry. For most practices that means Medicare, your state's Medicaid program and its managed care plans, and the two or three largest commercial plans in your area. Behavioral health providers should also identify which companies manage mental health benefits for local plans, since many plans "carve out" those benefits to a separate organization.
Step 4: Medicare and Medicaid enrollment
Medicare enrollment is done through PECOS and processed by your regional Medicare Administrative Contractor. Medicare generally allows billing for services up to 30 days before the date your application is filed, provided you met all requirements at the time, so file as soon as you are eligible. Medicaid enrollment is handled by each state, and managed care plans then credential you separately.
Step 5: Commercial applications and follow-up
Submit complete applications, then follow up on a fixed schedule. Payers request missing items by letter, email or portal message, and a request that sits unanswered for two weeks adds two weeks to your timeline.
Step 6: Review the contract before you sign
Check the fee schedule for your most common codes, the effective date, timely filing limits, termination terms and recoupment language. This is also the moment to ask about rates.
Step 7: Go live correctly
Confirm your effective date with each payer, load the fee schedule into your billing system, set up ERA and EFT, and don't schedule that payer's patients as in-network until you have written confirmation.
How long does credentialing take?
It varies by payer and state. Many payers finish in one to two months; some commercial plans take three months or more, and Medicaid managed care can add time after state enrollment. The single biggest factor you control is application completeness and follow-up speed.
Specialty differences to plan for
- Behavioral health and therapists: carve-out networks and closed panels are common. Medicare began enrolling marriage and family therapists and mental health counselors in 2024.
- Nurse practitioners and PAs: some payers credential them differently, and state collaboration rules may need to be documented.
- Surgical and hospital-based specialties: hospital privileges are often required or expected.
- Telehealth practices: you need a license and enrollment in each state where patients are located.
- Groups: each provider must be linked to the group's tax ID and locations with every payer.
Staying credentialed
Re-credentialing typically happens every two to three years, Medicare revalidation on its own cycle, and CAQH every 120 days. Any change of address, tax ID or ownership must be reported. A simple calendar of every date prevents surprise terminations.
If you'd rather not manage this yourself, our insurance credentialing and provider enrollment services handle it for every specialty.
Frequently asked questions
How long does provider credentialing take?
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Many payers complete credentialing in one to two months, and some commercial plans take three months or longer. Complete applications and quick responses to payer requests are the best way to shorten it.
What is CAQH and do I need it?
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CAQH ProView is a shared database most commercial payers use to collect provider information. Most providers who bill commercial insurance need a complete, current profile.
Can I see patients before I'm credentialed?
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You can see patients as self-pay, or out of network if the patient's plan allows. Billing a payer as in-network before your effective date usually leads to denials.
What's the difference between credentialing and contracting?
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Credentialing verifies your qualifications. Contracting sets your rates and terms. You need both before billing in network.
How we can help
This article is general information for healthcare providers, not legal, billing or medical advice. Rules change; confirm current requirements with the relevant agency or payer. Last reviewed October 18, 2026.