Quick note: I am not a credentialing specialist. What follows draws on CAQH's own published guidance, CMS documentation, and payers' own public enrollment pages. If you're dealing with a specific panel application problem, a credentialing specialist will save you time.
Ask how long credentialing takes and you'll usually get a single number back, as if it were one long wait. It isn't. It's four separate components, they don't always run in the same order, and knowing which one you're stuck in changes what you should actually do next.
Four components, not one wait
Credential review is the payer checking your license, education, malpractice history, and work history against primary sources. This is what most people mean when they say "credentialing."
Contracting is the payer sending you a network participation agreement covering your reimbursement rates, fee schedule, and timely filing rules. You have to sign it before you can bill as an in-network provider.
Enrollment is the administrative step of getting you into the payer's systems so claims can actually process once you're seeing clients.
Effective date is the date your network participation agreement takes effect. It may differ from the date you signed or completed your paperwork; it's a specific date the payer assigns, though the dates can coincide. It's one factor in whether a given claim gets paid, not the only one. Once you're approved, get written confirmation of your participation effective date and the billing requirements that apply to it.
These four don't run in a fixed universal order. Some payers review credentials first and contract after approval. Others describe the reverse: Aetna's own network enrollment page describes pulling your application from CAQH ProView only once you've already contracted with them and designated them as an authorized plan. The order, and how much the steps overlap, varies by payer, so don't assume the sequence from one panel applies to the next.
A therapist who says "I've been waiting four months and nothing's happening" might be stuck in review, waiting on a signed contract nobody chased down, or already enrolled with an effective date three weeks out. Those are three different problems with three different fixes. Ask the payer which component you're in before you assume the whole thing is stalled.
Picture two therapists opening the same kind of practice: one starts a CAQH profile and applies to panels six months before opening, the other waits until the week she needs the referrals. Both go through the same four components in whatever order their payers use. The first one is waiting through them before she needs the income. The second is waiting through them after.
Start earlier.
The CAQH profile is where you start
CAQH ProView centralizes your credential data for most major commercial payers. Instead of sending the same documents to 10 different panels, you upload them once to CAQH and authorize each payer to access them. Aetna's own network enrollment page, for example, describes pulling your credentialing application directly from CAQH ProView once you've contracted with them and designated Aetna as an authorized plan; the exact order and requirements vary by payer.
Setting up your CAQH profile isn't the same as applying to panels. It's the prerequisite. Without a CAQH profile, many panels can't start credential review.
You'll need: your NPI, degree and license information, malpractice insurance details, professional liability history, work history, and clinical training. It takes a couple of hours the first time.
CAQH requires re-attestation to keep your profile active: log in, confirm your information is still correct, and attest. Per CAQH's own provider guide, that cycle is every 120 days, with one exception: providers licensed in Illinois get 180 days. Miss the window and your profile goes inactive, which can stall credentialing and re-credentialing with every payer tied to it, not just one.
What delays applications
The most common reasons credentialing takes longer than it has to:
Incorrect or missing NPI taxonomy codes. Your NPI needs to reflect your license type and specialty accurately.
An incomplete CAQH profile. Payers set their own completeness requirements before they'll start review; check the specific payer's prerequisites rather than assuming a generic threshold.
Outdated malpractice certificate. Insurers often want the policy current at time of application, not just valid.
Practice address mismatch between CAQH and the application.
Missing or expired clinical references.
Most of these are fixable, and every one of them adds real time to an already long process, because a payer that flags a mismatch typically sends it back to you rather than fixing it on their end. Build a checklist before you submit so you're not finding these one at a time.
What follow-up actually looks like
There's no universal follow-up rule, because payers don't run one process. Some handle status checks through an online provider portal, others by phone only through a provider relations line, and a few still work primarily through paper and fax. Use the application-status channel the payer identifies in its enrollment instructions. Confirm receipt, record your reference number, and follow the payer's stated process for checking progress.
The reliable move: confirm the payer received your application (most will acknowledge receipt, by portal notification, email, or a reference number on a phone call), then find that specific payer's published process for checking status, whether that's a portal, a provider services line, or a dedicated credentialing contact. That information is usually on the same page where you found their application instructions. Follow their process instead of guessing at a universal timeline, and log every contact: date, method, who you spoke with, what they told you.
If a payer can't tell you anything about your application after a stretch that feels unreasonable for that payer type, ask directly whether it was received and is in active review. Applications do get lost.
When to start
Every payer sets its own credentialing and contracting timeline, and turnaround varies enough by payer, provider type, and region that a single number across payers isn't reliable. Medicare enrollment runs on its own track through PECOS, CMS's enrollment system, and Medicaid and TRICARE timelines vary further by state and plan. For any commercial payer you're applying to, check that payer's own stated credentialing and contracting timeline on their provider enrollment page; look for a published timeline, and ask the payer directly if none is provided, rather than relying on a generic range.
If you're six months out from opening a private practice: start your CAQH profile now. Identify the two or three panels most common in your area (ask other local therapists or look at what Psychology Today members in your region list), then check each panel's specific prerequisites and whether it's currently accepting new applications before you submit.
If you're already open and haven't applied: confirm each payer's prerequisites are met and that the panel is open to new applications, then submit. The earlier you start, the earlier you find out which of the four components is going to be the slow one for you.
If you are still deciding whether to go insurance at all: that is a separate decision. But if insurance is part of your plan at any point in the next 12 months, the time to start the CAQH profile is now.
Applying early doesn't shorten any single payer's process. It changes whether you're waiting through it before you need the income or after.