Behavioral Health Credentialing Process: CAQH, PECOS and Payer Enrollment

Credentialing is the payer checking your qualifications. Enrollment sets you up in the payer's system so claims can be paid. For Medicare that happens in PECOS. Contracting sets your network status and rates. An in-network claim pays only when all three are done and you have a confirmed effective date.

Credentialing: the payer verifies you

Credentialing means the payer reviews your application, checks it against primary sources and sends it to a committee. UnitedHealthcare describes it this way: "after receiving a completed application, we perform primary source verification. Next, we present your request for participation to our credentialing committee" (UnitedHealthcare Credentialing FAQ). Other payers use their own versions of the same review.

Enrollment: you get set up to be paid

For Medicare, CMS lays out four steps: get an NPI, complete the application in PECOS, pay the application fee if one applies and work with your Medicare Administrative Contractor (MAC) (CMS, Become a Medicare Provider or Supplier). The MAC issues your Provider Transaction Access Number (PTAN) when you enroll. Your approval letter includes it (CMS MFT/MHC Enrollment FAQ, Q21).

Contracting and the effective date

Credentialing approval isn't the finish line. Aetna's own steps put the contract last: "When you complete credentialing, your contract will be finalized" (Aetna, Join the network). Carelon handles clinicians joining a participating group differently. They don't get their own contract. They're "added to the existing agreement once you've been approved for credentialing" (Carelon Behavioral Health, Join our network). Either way, get the effective date in writing before you schedule in-network sessions.

Every application keys off your NPI and your legal name. NPPES and PECOS don't sync on their own, so check both before you file anything.

Type 1 vs. Type 2 NPI

A Type 1 NPI is for individual providers, and individuals can only have one. A Type 2 NPI is for organizations such as group practices (CMS NPI Fact Sheet). Clinicians in a group keep their own Type 1.

Taxonomy code

A taxonomy code is "a unique 10-character code that designates your classification and specialization" (CMS, Find Your Taxonomy Code). For Medicare's newer license types, CMS lists 106H00000X for marriage and family therapists and 101YM0800X for mental health counselors (CMS MFT/MHC FAQ, Q6).

Names and data have to match

CMS says the "Legal Business Name and Individual provider's name must match" between NPPES and PECOS. An update in NPPES "does not automatically update the provider's Medicare enrollment information in PECOS" (CMS PECOS Fact Sheet). Report changes to your NPI information within 30 days (CMS NPI Fact Sheet). A name change that lands in one system and not the other is a quiet way to stall an application.

Many commercial and behavioral health networks pull your application from the CAQH Provider Data Portal. That only works if the profile is complete, attested and authorized for that payer.

On June 7, 2026 CAQH rebranded as "DataSpring, powered by CAQH" (DataSpring announcement). The profile tool is now the CAQH Provider Data Portal at the same sign-in address (CAQH Provider Data Portal). Some payer pages still say "CAQH ProView". UnitedHealthcare's FAQ calls it the "CAQH Provider Data Portal (previously known as the ProView®)" (UnitedHealthcare Credentialing FAQ). It's the same profile.

What to have ready

The portal says setting up your initial profile "may take up to two hours" (CAQH Provider Data Portal, Registration). Its materials list includes your W-9, DEA certificate, controlled substance certificate, malpractice insurance information, hospital affiliations, work history and references. Gather these first so you can finish in one pass.

Authorize each payer

A complete profile doesn't help if the payer can't see it. Optum's audit of slow applications lists "We do not have authorization to access your CAQH application" as a common issue (Optum Provider Express, Individually Credentialed Clinicians). Evernorth also says it "must be authorized to access your CAQH profile" (Evernorth, Join the network). Check the authorization settings each time you apply to a new payer.

Re-attest every 120 days

Re-attestation is required every 120 days, or every 180 days for Illinois practitioners (DataSpring Practitioner Quick Reference Guide v4.0). Reminder emails go out 15, 10 and 5 days before expiration. If you don't re-attest you move to Expired status the day after it was due (DataSpring Provider User Guide v46.0, App. A.3). An expired profile can stall any application that depends on it.

Is CAQH mandatory?

Not formally. DataSpring says participation "is voluntary. However, more than 1,000 health plans and other healthcare organizations have requested that their network providers use the Provider Data Portal for credentialing" (DataSpring Resources FAQ). Optum says CAQH participation "is required in the majority of the states to join our network" (Optum Provider Express). So if you plan to join commercial networks, expect to need it.

Medicare enrollment is separate from every commercial credential and from Medicaid. You file the CMS-855I in PECOS. Your billing start date follows CMS's effective-date rules, not your hire date.

Which form to file

Physicians and non-physician practitioners enroll on the CMS-855I (PIM ch. 10 §10.3.1.3). CMS merged the old CMS-855R into it. To reassign benefits to a group you complete section 4F of the 855I (CMS Consolidated CMS-855I/855R bulletin). The group itself enrolls on its own application.

Application fee

The CMS fee matrix shows no application fee for physicians, non-physician practitioners or clinic/group practices. Community mental health centers do pay one (CMS Application Fee Matrix). MFTs and MHCs "are not required to pay an application fee" (CMS MFT/MHC FAQ, Q20).

The effective date and the 30-day retro window

This is the rule that decides which sessions Medicare will pay for. Your effective date of billing privileges is the later of two dates: the date the MAC received your application (if it's approved), or the date you first saw patients at the new location. You can bill back up to 30 days before that effective date if you met every program requirement, including state licensure. That window is 90 days if a Presidentially-declared disaster kept you from enrolling. The approval date itself can't be made retroactive (Medicare Program Integrity Manual ch. 10 §10.6.2, Rev. 13717).

CMS gives its own example in that section:

Source: PIM ch. 10 §10.6.2(A)–(B).

The takeaway is simple. File the 855I as soon as the clinician has a start date and a license. Every week you wait can push sessions outside the window.

Don't let PECOS delete your application

PECOS deletes applications that sit too long. Applications in NEW or EDIT status are deleted after 120 days of inactivity. OPENED FOR CORRECTIONS is deleted if it's not submitted within 20 days. RETURNED FOR CORRECTIONS is rejected if corrections aren't received within 30 days. A REJECTED application is deleted if it's not reopened within 60 days (CMS, Protect Your PECOS Application). A half-finished draft is the easiest thing to lose here.

How long MACs have to process it

CMS sets processing standards for MACs. These are targets for the contractor, not a promise to you. More on them in the timeline section below. If the MAC sends a development letter asking for more information, you have 30 calendar days to respond (CMS MFT/MHC FAQ, Q17).

MFTs, MHCs and telehealth-only clinicians

Medicare payment for MFT and MHC services began January 1, 2024 (CMS MFT/MHC FAQ, Q1). If your only practice location is your home and you see patients by telehealth, CMS asks you to list it with a "Home Office for Administrative/Telehealth Use Only" type. That keeps your home address off Care Compare (CMS, Understanding Telehealth Enrollment, rev. 7/23/2026).

Opting out instead

Some clinicians choose not to enroll. CMS says physicians and non-physician practitioners who see Medicare patients but don't want to enroll and bill Medicare "are required to opt-out". Patients then pay out of pocket under a private contract (CMS MFT/MHC FAQ, Q40). Clinical psychologists, clinical social workers, MFTs, MHCs, MDs, DOs and nurse practitioners are among the types eligible to opt out. Opt-out status renews automatically every 2 years. You can end an initial opt-out within its first 90 days (CMS, Manage Your Enrollment). To cancel at renewal, CMS says to send written notice to your MAC no later than 30 days before the current 2-year period ends (CMS MFT/MHC FAQ, Q42).

A word on Medicaid

"Enrolling in Medicaid does not automatically enroll you in Medicare" (CMS MFT/MHC FAQ, Q23). Medicaid enrollment is run by each state, so start with your State Medicaid Agency's provider enrollment page.

For some plans the behavioral health network is a separate company from the medical plan. Apply where the payer sends behavioral health clinicians.

UnitedHealthcare says behavioral health practitioners "contact Optum Behavioral Health Solutions, which handles credentialing and contracting on behalf of UnitedHealthcare" (UnitedHealthcare). Evernorth's form "must be completed in a single session". You can't save it and come back (Evernorth).

Why applications stall

Optum published an audit of the issues that slow down or cancel applications to its network (Optum Provider Express). The list reads like a checklist of what to fix first:

• CAQH profile incomplete or expired
• Practice locations on the Optum form don't match CAQH
• No CAQH authorization for Optum
• Out-of-date license or insurance dates in CAQH
• Unsigned W-9 or a wrong tax ID
• Slow return of documents sent by DocuSign

Evernorth's minimums worth copying

Evernorth lists requirements that make a good baseline for any payer packet (Evernorth, Join the network):

• An active license in each state where you provide services
• For prescribers, a current DEA registration for every location, expiring at least 60 days out
• Five years of consecutive work history with gaps over six months explained
• A resume or CV dated within the last two years, if you use one
• A completed W-9 for each TIN

Evernorth also says providers must "agree to participate at all service locations" and participation "is not limited to specific Tax Identification Numbers" (Evernorth). Plan your locations before you apply.

Approved isn't the same as billable

After credentialing the contract still has to be finalized and loaded. Ask each payer for your effective date in writing and don't bill in-network before it. Evernorth says provisional credentialing is possible "in certain circumstances" and decided case by case (Evernorth). Don't plan around it.

There's no single number. Medicare sets processing standards for its contractors. One major behavioral health network publishes a maximum. Most payer pages we checked publish nothing. So plan backward from the first date you want to bill.

Two things follow from this table. Medicare publishes the clearest standards, especially for clean online applications. And for commercial networks the honest answer is that you won't know until you apply, so start early and follow up.

If tracking these clocks across several clinicians and payers is eating your week, our behavioral health credentialing services handle CAQH, PECOS and payer follow-up.

The steps are the same for everyone. Each license type has its own Medicare and payer details.

Psychologists

Medicare lists clinical psychologists and independently billing psychologists as separate categories under its effective-date rules (PIM ch. 10 §10.6.2(B)(1)). Make sure the application matches how you'll actually bill. Clinical psychologists can also opt out of Medicare. The CMS fee matrix shows no application fee for physicians or non-physician practitioners, the two groups that enroll on the CMS-855I (CMS Application Fee Matrix). If you run a testing-heavy practice, finish credentialing before you book testing blocks. For the billing side, see our psychology billing page.

Psychiatrists and PMHNPs

Psychiatrists and psychiatric nurse practitioners enroll in Medicare on the CMS-855I (PIM ch. 10 §10.3.1.3). Evernorth asks prescribers for a current DEA registration for every location where they'll provide services, with the expiration date at least 60 days away (Evernorth). The DEA certificate also goes in your CAQH profile. Our psychiatry billing page covers what happens after you're in network.

LCSWs, LPCs, LMHCs and LMFTs

Since 2024 Medicare enrolls MFTs and MHCs as their own categories. Addiction counselors and alcohol and drug counselors who meet the MHC requirements can enroll as MHCs (CMS MFT/MHC FAQ, Q3 and Q13). Commercial acceptance varies by license and state. Check each payer's eligibility list before you apply.

Group practices

The group enrolls and each clinician reassigns benefits to it in section 4F of their 855I (CMS 855I/855R bulletin). When a group adds MFTs or MHCs, "the group's PTAN will not change". Each clinician gets their own PTAN linked to the group (CMS MFT/MHC FAQ, Q28).

Credentialing isn't a one-time project. CAQH, Medicare and each payer run their own renewal clocks.

On revalidation CMS is direct. Do revalidate if you're within three months of your due date even if no notice came. Don't revalidate more than seven months early unless you've been asked. CMS "doesn't grant extensions". If billing privileges are deactivated you need a complete new application, and "Medicare won't reimburse you for any services during the period that you were deactivated" (CMS Revalidations).

• NPI confirmed and taxonomy code correct
• Name in NPPES matches PECOS exactly
• CAQH profile complete, attested and authorized for each payer
• CMS-855I filed with section 4F reassignment, and PECOS status checked before any deletion window
• Medicare effective date and earliest billable date recorded
• Each payer application sent to the right behavioral health network
• Contract executed and effective date confirmed in writing
• Payer IDs loaded in your billing system
• Reminders set for CAQH re-attestation and Medicare revalidation

Not sure whether gaps like these are already costing you claims? Start with a free revenue audit.

Payer and state rules vary and change. Confirm the details with each payer and your MAC. This isn't legal advice.