How Long Does Credentialing Take? A Planning Timeline

Reviewed November 10, 2026

If a new provider starts in the first quarter of 2027, the credentialing clock is already running, and the timeline below works backward from that start date.

Credentialing a new provider usually takes anywhere from several weeks to a few months per payer. Medicare sets processing targets for its contractors, Medicaid and commercial plans set their own, and commercial credentialing plus contracting is often the longest step. Because no payer guarantees a date, the safest plan is to start the day the offer letter is signed. Until the provider is approved, the practice is paying a salary for visits it may not be able to bill.

Here is what slows each step down, and how to plan so a new provider is ready to bill as close to their start date as payers allow.

Credentialing vs enrollment, in one minute

Credentialing is the payer verifying the provider’s license, training and history. Enrollment (or contracting) is the payer agreeing to pay that provider under your group’s tax ID. Both have to be finished for each payer, or claims deny. Our page on physician credentialing services covers the difference in more depth.

What has to be ready before you apply

Applications stall most often because something on this list is missing or out of date:

• Active state license in the state where the provider will practice.
• DEA registration, if the provider will prescribe controlled substances.
• An individual NPI (and your group’s organizational NPI).
• Current malpractice coverage, with the certificate.
• Board certification or eligibility details.
• Work history with explanations for any gaps.
• A complete CAQH profile (the CAQH Provider Data Portal, formerly ProView), attested, with the practice authorized to view it. Many commercial payers use CAQH data for credentialing. Profiles must be re-attested every 120 days (180 days in Illinois), and a lapsed attestation can stop an application. Our article on CAQH re-attestation and Medicare revalidation covers the common mistakes.

Medicare

Medicare is usually the most predictable step. Your credentialing contact files the provider’s enrollment and the reassignment of their billing to your group in PECOS, Medicare’s online enrollment system, using the CMS-855I. If the group itself is new to Medicare, it also enrolls on the CMS-855B.

How long it takes. CMS sets processing standards for its contractors. Complete online applications are generally processed faster than paper ones, and applications that need more information, a site visit or fingerprinting take longer. These are targets for the contractor, not a guarantee for any single application. If the contractor asks for more information, you generally have 30 days to respond, or the application can be rejected.

Don’t file too early. CMS can return an application received more than 60 days before the effective date listed on it. For a new hire, that usually means filing within 60 days of the start date, while having everything else ready well before then.

When billing can start. For physicians and non-physician practitioners, the effective date is generally the later of the date the application was filed (and later approved) or the date the provider began seeing patients at the new location. If circumstances kept the provider from enrolling sooner, Medicare allows billing for services up to 30 days before the effective date. That window is useful but narrow: a provider who sees Medicare patients for two months before anyone files cannot bill for most of those visits.

Staying enrolled. Medicare enrollment must be revalidated every five years, and CMS can request revalidation off-cycle. Missing a revalidation can lead to a hold on Medicare payments or deactivation of billing privileges.

Medicaid

Each state runs its own Medicaid enrollment, and Medicaid managed care plans often add their own credentialing on top. Timelines and requirements vary by state and plan. Federal rules require state Medicaid agencies to conduct site visits for providers they classify as moderate or high risk, and fingerprinting for high-risk providers, and states can add requirements of their own. Check your state Medicaid agency’s provider enrollment page early.

Commercial payers

Commercial payers often take the longest, and every payer runs its own process. Things that commonly add time:

• Closed panels. Some payers are not adding providers of a given specialty in a given area, and may only add a new provider to an existing group contract.
• Contract negotiation. A new group needs a contract, not just credentialing.
• Incomplete CAQH profiles or attestations that lapse mid-process.
• Committee schedules. Some payers approve providers at periodic credentialing committee meetings.

Many commercial payers do not pay for services before the provider’s effective date with them. Ask each payer for its current turnaround and its policy on retroactive effective dates before you schedule patients.

A planning timeline

Plan backward from the provider’s first day of seeing patients. This is planning guidance, not a promise of how long any payer will take:

When	What to do
Week 0 (offer signed)	Collect license, DEA, NPI, malpractice, CV and work history. Create or update CAQH and authorize your practice.
Week 0–1	Submit commercial payer applications, starting with your highest-volume payers. Start state Medicaid per your state’s rules.
Within 60 days of start date	Submit Medicare (CMS-855I with reassignment to your group).
Every 2 weeks	Follow up with each payer; log the status, date and the name of the person you spoke with.
Start date minus 30 days	Review which payers are approved. Decide which patients the provider can see, by payer, until the rest are complete.
After each approval	Confirm the effective date and that the provider is linked to your group before billing.

What a delay costs, and what to do in the gap

Multiply the visits you expect per week by your average payment per visit. That is roughly what each week of delay costs for each payer that has not approved the provider yet.

Until a payer approves the provider, schedule the provider with patients whose plans have already approved them and with self-pay patients, and use the Medicare 30-day window carefully. Do not bill a new provider’s visits under another provider’s NPI as a workaround. Unless a visit genuinely meets a payer’s specific rules, such as Medicare’s “incident to” requirements (direct supervision, and a course of treatment the billing physician started and stays actively involved in), the claim misidentifies who performed the service and can create overpayment liability. Medicare’s substitute-physician (locum tenens) billing is for covering an absent regular physician, not for a new hire waiting on enrollment.

Where practices lose money during credentialing

• Scheduling patients with payers that have not approved the provider yet.
• Filing Medicare too early and having the application returned.
• Missing a request for information because it went to an inbox nobody checks.
• Letting CAQH attestation lapse mid-application.
• Not confirming that the provider is linked to the group’s tax ID after approval.

Who owns the follow-up

If you are adding more than one provider, or your highest-volume payers are slow in your area, it is worth having one person own every application and follow-up date. The credentialing link below shows how we handle that.