How long does provider credentialing take?

Plan for 90 to 150 days with commercial payers and 45 to 90 days for Medicare Part B when the application has no errors. Medicaid ranges from three weeks to six months depending on the state.

What is the difference between credentialing and enrollment?

Credentialing is verification of the provider's credentials through primary sources. Enrollment is the payer-side contracting and loading step that gives the provider an effective date, a participating status, and a fee schedule.

Can I bill for services before credentialing is complete?

Generally no. Some payers allow retroactive effective dates — Medicare commonly allows up to 30 days of retrospective billing — but most commercial plans do not, and claims before the effective date are denied as non-participating.

How often is CAQH attestation required?

Every 120 days. An expired attestation makes the profile unusable for payers pulling data, which stalls both new applications and re-credentialing cycles.

What triggers Medicare revalidation?

CMS revalidates most providers every five years and DMEPOS suppliers every three, on a published schedule. Failure to respond by the due date results in a deactivated billing privilege and a gap in payable claims.

Credentialing

Provider Credentialing and Payer Enrollment

Get the provider approved, loaded, and payable — then keep them that way.

Credentialing decides whether a provider can bill at all, and it is the one part of the revenue cycle where a delay costs money in a straight line. A physician who starts seeing patients before enrollment is effective generates claims that cannot be paid, and in most cases cannot be backdated far enough to rescue them.

The process has two halves that people constantly conflate. Credentialing is the verification of a provider's identity, education, licensure, work history, and malpractice record — the primary source verification a payer or hospital performs. Enrollment is the contractual and administrative step that loads that provider into a payer's system under a group, with an effective date and a fee schedule attached.

Timelines are the hard part. Commercial payers routinely take 90 to 150 days, Medicare Part B enrollment through PECOS runs 45 to 90 days when the application is clean, and Medicaid varies wildly by state. Every incomplete field, expired attestation, or mismatched address restarts the clock rather than pausing it.

Then there is maintenance, which is where most groups fail quietly. CAQH attestation every 120 days, Medicare revalidation on a five-year cycle (three for DMEPOS), re-credentialing every two to three years, license and DEA renewals, and updates to every payer whenever a provider changes location or tax ID. Miss one and the provider goes non-par without warning, usually discovered through a batch of denials.

These pages document the process step by step, including what each payer asks for, what the realistic timelines look like in 2026, and the tracking discipline that keeps a roster current.

Explore this section

Credentialing Process
Primary source verification, documents, timelines, and re-credentialing.
Payer Enrollment
Group and individual enrollment, effective dates, and contract loading.
Medicare & Medicaid Enrollment
CMS-855 forms, revalidation cycles, and state Medicaid quirks.
CAQH & PECOS
Profile setup, attestation cadence, and keeping both systems in sync.

Frequently asked questions

How long does provider credentialing take?: Plan for 90 to 150 days with commercial payers and 45 to 90 days for Medicare Part B when the application has no errors. Medicaid ranges from three weeks to six months depending on the state.
What is the difference between credentialing and enrollment?: Credentialing is verification of the provider's credentials through primary sources. Enrollment is the payer-side contracting and loading step that gives the provider an effective date, a participating status, and a fee schedule.
Can I bill for services before credentialing is complete?: Generally no. Some payers allow retroactive effective dates — Medicare commonly allows up to 30 days of retrospective billing — but most commercial plans do not, and claims before the effective date are denied as non-participating.
How often is CAQH attestation required?: Every 120 days. An expired attestation makes the profile unusable for payers pulling data, which stalls both new applications and re-credentialing cycles.
What triggers Medicare revalidation?: CMS revalidates most providers every five years and DMEPOS suppliers every three, on a published schedule. Failure to respond by the due date results in a deactivated billing privilege and a gap in payable claims.

More on credentialing

Enrollment timelines, CAQH and PECOS mechanics, revalidation calendars — explained step by step.

Read the guides