How long insurance credentialing takes for a new practice

How long does insurance credentialing take? It depends on the payer, and no single national figure covers every plan. For Medicare, CMS holds its contractors to processing 95% of online (PECOS) enrollment applications within 15 calendar days when they don't require development, a site visit, or fingerprinting. Commercial plans set their own clocks: Highmark's goal is 45 days from a complete application. The AMA reported in September 2026 that credentialing can take up to 180 days.

This is general planning information, not legal advice. Every rule and payer target below is dated as of October 2026.

What is the difference between credentialing, enrollment, and contracting?

Credentialing is the check a health plan runs on your license, training, and history before it adds you to its network. Enrollment is the paperwork that sets you up to bill a program, such as Medicare's CMS-855I application. Contracting sets your rates and your network effective date. The three can finish on different days.

Capital Blue Cross, for example, tells providers not to schedule its members until a second notice confirms participation and effective dates. Track each payer on four dates: when you applied, when it approved you, when your contract was signed, and your written effective date. The credentialing services page explains what that work involves.

How long does insurance credentialing take, payer by payer?

Each payer publishes its own timeline, and Medicare's is the most detailed. CMS's Program Integrity Manual (revision of July 8, 2026) sets how fast Medicare contractors must process enrollment applications. "Development" means the contractor has to contact you for more information. Commercial plans post targets on their own provider pages, and some states set deadlines in law. The table shows what each source says, as of October 2026.

Payer or program	What the source says	Source
Medicare, PECOS (online) application that doesn't require development, a site visit or fingerprinting	95% processed within 15 calendar days of receipt, and 100% within 50	CMS Program Integrity Manual, chapter 10, section 10.5
Medicare, PECOS (online) application that requires development, a site visit or fingerprinting	95% within 50 calendar days, and 100% within 85	Same section
Medicare, paper application that doesn't require development, a site visit or fingerprinting	95% within 30 calendar days, and 100% within 65	Same section
Medicare, paper application that requires development, a site visit or fingerprinting	95% within 65 calendar days, and 100% within 100	Same section
Medicaid	Each state runs its own enrollment. There's no published figure for this as of October 2026	None national
Highmark	A goal of initial credentialing within 45 days of a complete application. It won't accept an initial application more than six weeks before the start date	Highmark professional credentialing
Capital Blue Cross	Credentialing decisions within 60 days following committee review (counted from the committee's review, not from submission), then a second notice with participation and effective dates	Capital Blue Cross credentialing guide
An insurer's managed care product in New York	Notice within 60 days of a completed application on whether you're credentialed, or that a third party's missing documents need more time. A final decision within 21 days of receiving those documents	New York Insurance Law section 4803

The Medicare figures are processing standards for contractors, not a promise for one application. The payer targets cover the payers that published them, and no one else.

What are the steps, and what does each cost?

The steps run in this order, because each one feeds the next. Medicare and Medicaid enrollment can run at the same time as commercial credentialing once your identifier and your CAQH profile exist. CAQH ProView is the shared profile many plans read instead of separate paper forms. Where no publisher gives a cost or a time for a step, the table says so.

1. Get your National Provider Identifier (NPI) through CMS's enumeration system.
2. Build and attest your CAQH ProView profile, and authorize each plan to read it.
3. Enroll in Medicare with Form CMS-855I, online through PECOS.
4. Enroll in your state's Medicaid program, if you will see Medicaid patients.
5. Request participation with each commercial plan, then sign its contract.
6. Get each written effective date before you book that plan's members.

Step	Cost	Time
NPI	There's no published figure for this as of October 2026	There's no published figure for this as of October 2026. CMS says the online application gives the fastest receipt of an NPI
CAQH ProView	CAQH says it is free to providers	Reattest every 120 days (180 days in Illinois), per CAQH
Medicare CMS-855I	Physicians, nurse practitioners and other non-physician practitioners don't pay a Medicare enrollment application fee, per CMS	15 to 100 calendar days, by the standards in the payer table
Medicaid	There's no published figure for this as of October 2026	There's no published figure for this as of October 2026
Commercial plans	There's no published figure for this as of October 2026	Set by each plan, as the payer table shows
Effective date	None	Set in each payer's written notice

Sources: CMS's NPI application page, the CAQH ProView guide, and CMS's Medicare Provider Enrollment booklet, December 2025.

Can you bill for patients you see before you're approved?

For Medicare, only a little, and for most commercial plans, usually not. Under 42 CFR 424.520(d), as of October 2026, a physician's or non-physician practitioner's Medicare effective date is the later of two dates: when the contractor received the application it later approved, or when you first saw patients at the new location. Section 424.521 then allows billing up to 30 days before that date, if circumstances kept you from enrolling first.

That 30-day window grows to 90 days only when a Presidentially declared disaster under the Stafford Act kept you from enrolling, per 42 CFR 424.521. The effective date rule is 42 CFR 424.520. So a Medicare application filed three months after opening leaves about two months of visits you can't bill to Medicare.

Commercial plans are stricter. The AMA's September 18, 2026 article on practice finances says "Most commercial payers will not pay retroactively for care provided during the approval process." Read each contract's effective date clause before you see that plan's members.

After Medicare approves you, CMS gives you 90 days from the initial approval letter to decide whether to be a participating provider, according to its enrollment booklet.

What slows credentialing down?

Missing information and stale data are the delays the sources name. A Medicare contractor that asks for missing information can reject the application if you don't supply it within 30 calendar days, under 42 CFR 424.525 as of October 2026. A rejected application has no appeal rights, so you file a new one, and the new filing date sets your effective date.

Other delays the sources name:

• A stale signature. Medicare can reject an application signed more than 120 days before the contractor received it (42 CFR 424.525(a)(1)(iv)).
• A lapsed CAQH attestation. CAQH asks providers to reattest every 120 days, or 180 days in Illinois. Highmark asks that the profile be current, reattested, and authorized for Highmark before you submit.
• Old verifications. Capital Blue Cross says the CAQH application, attestation, and primary source verifications must be dated within 120 days of its credentialing committee's decision. If credentialing runs longer, you may have to update CAQH and redo verifications.
• Missing third-party documents. In New York, an insurer can take extra time when a third party hasn't sent required documents, then has 21 days after they arrive to decide.

When should a new practice start credentialing?

Start with the payer that takes longest and work back from your first planned visit. In the AMA's September 2026 article, Michael Jerkins, MD, MEd, president and cofounder of Panacea Financial, recommended starting at least 120 days before the first planned patient visit. He said, "One of the most common mistakes is that people don't start the process until a month or two before opening."

Not every payer will take an application that early. Highmark won't accept an initial application more than six weeks before the practitioner's start date. So keep one calendar row per payer, with its own earliest submission date and its own published timeline from the table above.

For Medicare, the effective date can't be earlier than the date the contractor received your application or the date you first saw patients at the location. Filing late is what costs you visits.

How long does credentialing take with Vye Health?

Credentialing usually takes a few weeks. You can set up your practice and website while it's in progress. That is Vye's timeline for the credentialing it runs. It is not a figure for any one payer, and it is not the AMA's benchmark above. A plan that needs more documents can take longer.

Vye bills insurance for your practice. Billing for a plan starts once you're credentialed with that plan, so the dates in your payer tracker still decide when each plan's claims can go out.

What can you do while credentialing is in progress?

Build everything that doesn't need a payer's approval. The AMA article notes that a cash-pay or membership service does not need to wait for credentialing and can collect revenue from the first day, while warning that very little income in the first three to six months is common. If you plan a mix, the cash-pay guide compares cash-pay only, insurance, and both.

While you wait:

1. Finish the launch sequence in the private practice guide.
2. Price your first year with the startup cost guide, including rent and payroll that start before claims are paid.
3. Set up a tracker with one row per payer: applied, approved, contract signed, and written effective date.
4. Book insured patients for each plan only after that plan's written effective date.

Where can Vye Health help?

Vye Health helps providers launch, run, and grow private practices. Vye manages licensing, credentialing, malpractice insurance, and your website, and payer contracts if you want them. You can launch your practice while you're still employed. Bring your list of payers and your target opening date. Apply to Vye Health.