Credentialing a PMHNP With Insurers: A Practice's Guide

Credentialing sets the date from which a new PMHNP's visits can be billed. This guide covers the practice's side. The clinician's side is in our PMHNP licensing and credentialing guide, and the steps before the offer are in our guide to hiring a PMHNP.

This is general information, not billing or legal advice, and it reflects rules as of October 2026. Confirm details with your Medicare Administrative Contractor (MAC), your state Medicaid agency and each plan.

Documents to Collect From the New Hire

Ask for these with the signed offer. Every application draws on the same records, and CMS warns that incorrect data in PECOS or NPPES "may lead to unnecessary inquiries" (CMS PECOS fact sheet).

If your state requires a collaborative agreement for NP practice, sign it before applications go out. The practice authority map shows each state's classification, and our guide to PMHNP collaborative agreements explains what an agreement covers.

Confirm the NPI in NPPES

An individual is eligible for only one NPI, so a PMHNP who already has one keeps it (CMS NPI fact sheet). Check it in the NPI Registry: the name, taxonomy and practice address should match the license and CAQH profile. A new graduate without one applies in NPPES.

NPPES is the CMS database that stores and manages all NPIs, and a HIPAA covered health care provider must report any change in its required NPI data elements within 30 days of the change (CMS NPI fact sheet, 45 CFR 162.410). An update to an NPI record in NPPES does not automatically update the provider's Medicare enrollment information in PECOS (CMS PECOS fact sheet), and the name and NPI must match exactly in both systems (CMS-855I).

CAQH ProView and How Commercial Payers Use It

Many commercial plans pull credentialing data from CAQH. Aetna takes its credentialing application from CAQH ProView and asks applicants to designate Aetna as an authorized health plan (Aetna). Optum Behavioral Health says CAQH participation is required in the majority of states to join its network (Optum).

As of October 2026, CAQH has rebranded as DataSpring, powered by CAQH. Clinicians keep their provider profile in DataSpring's CAQH Provider Data Portal, whose login is still at proview.caqh.org, and DataSpring says portal access and saved links remain the same (DataSpring). It also says the platform is free to clinicians and practices, lets practice management staff enter information, and keeps profiles on a 120-day attestation cycle (DataSpring).

Medicare: PECOS, the CMS-855I and Reassignment

Medicare enrollment runs through PECOS, and CMS says PECOS applications tend to process faster than paper ones (CMS). To bill Medicare for the PMHNP's services, a clinic or group practice needs two enrollments, which can be filed at the same time:

• Your practice's group enrollment on the CMS-855B, the application clinics and group practices complete to enroll in Medicare and receive a Medicare billing number (CMS-855B).
• The PMHNP's individual enrollment on the CMS-855I, which also carries the reassignment of benefits that lets your practice bill for their services (CMS-855I).

Both parties must be enrolled, or enrolling concurrently, before a reassignment takes effect (CMS-855B, CMS-855I). CMS also allows reassignment to an eligible individual, who is enrolled on the CMS-855I. As of October 2026, the CMS-855I states that all reassignment actions are reported on it and that the separate CMS-855R has been discontinued. The PMHNP signs Section 15B, your practice's authorized or delegated official signs Section 15C, and the practice generally submits it (CMS-855I).

Medicare's enrollment rules count nurse practitioners among non-physician practitioners (42 CFR 424.518). For that group, the effective date of Medicare billing privileges is the later of the filing date of an enrollment application that a Medicare contractor subsequently approved, or the date the practitioner first began furnishing services at a new practice location (42 CFR 424.520). If circumstances prevented enrolling in advance, the practitioner may bill retrospectively for services furnished up to 30 days before the effective date, or up to 90 days when a Presidentially declared disaster prevented it. Either window applies only if the practitioner had met all program requirements, including state licensure, and furnished the services at the enrolled practice location (42 CFR 424.521). File before the start date.

Medicaid Enrollment Is State by State

Each state runs its own Medicaid enrollment. Federal rules require every provider a state Medicaid agency enrolls to be screened, though the agency may rely on screening already done by Medicare contractors or by another state's Medicaid or CHIP agency (42 CFR 455.410). States must also screen and enroll the network providers of Medicaid managed care plans. A plan may contract with a clinician for up to 120 days while that enrollment is pending, and must end the contract immediately if the state says the clinician cannot be enrolled or once one 120-day period passes without enrollment (42 CFR 438.602). Portals differ: Texas, for example, uses its Provider Enrollment and Management System (PEMS) (TMHP).

Commercial Applications and Panel Status

Aetna says that when a panel is not open, it denies the request by letter or email (Aetna), so ask about panel status first.

Behavioral health often has its own network. UnitedHealthcare directs clinicians joining the Optum Behavioral Health network to a separate site (UnitedHealthcare), and Cigna directs behavioral health providers to Evernorth Behavioral Health (Cigna).

UnitedHealthcare also says a clinician must complete onboarding before seeing patients as an in-network provider (UnitedHealthcare).

Medicare Advantage organizations must have written policies for selecting and evaluating providers, and they must credential the clinicians who sign contracts or participation agreements with them. Initial credentialing covers a written application, verification of licensure or certification from primary sources, disciplinary status, eligibility for payment under Medicare and site visits as appropriate, and recredentialing comes at least every three years (42 CFR 422.204). A PMHNP who wants to be in a Medicare Advantage plan's network must contract with that plan and complete its credentialing.

How Long Credentialing Takes, and Why

Each clock below starts once the payer has the application, so assembling the file comes first.

Delays come from incomplete files, follow-up requests, incorrect or mismatched data in PECOS and NPPES (CMS PECOS fact sheet), and verification: UnitedHealthcare says its timeline depends on response times from medical schools, residencies, specialty boards and hospitals (UnitedHealthcare). Our guide to the cost to hire a PMHNP covers budgeting for the weeks before each payer's effective date.

How Medicare Pays NP Services

Medicare allowed amounts for the services of a nurse practitioner, including a PMHNP, may not exceed 85 percent of the physician fee schedule amount for the service (42 CFR 414.56). For services provided outside a hospital or skilled nursing facility setting, CMS pays NP services at 80 percent of the lesser of the actual charge or 85 percent of what a physician gets under the physician fee schedule, and it pays NPs only on an assignment basis (CMS).

A nurse practitioner can also provide services as auxiliary personnel incident to a supervising physician's professional services. The supervising physician bills for them, and Medicare pays 100 percent of the physician fee schedule when the services comply with state law and meet every incident-to requirement (CMS). As of October 2026, those requirements include: the physician personally performed an initial service and remains actively involved in the course of treatment, the services are commonly provided in the physician's office or clinic, and supervision is direct, or general for behavioral health services (CMS). When the PMHNP performs the initial service, that care does not meet the first condition for billing incident to the physician. Ask each commercial plan in writing how it pays NP services and whether it accepts incident-to billing.

Telehealth and Multi-State Credentialing

Medicare covers NP services only when the NP is authorized by the state where they provide them, under that state's law (CMS). Confirm with each state's board of nursing which license it requires; our candidate guide covers multi-state licensing. Then credential state by state:

• Medicare. As of October 2026, the CMS-855I asks for practice locations, including telehealth distant sites, and a location outside your MAC's jurisdiction needs a separate CMS-855I filed with the MAC for that location (CMS-855I). Ask your MAC how this applies when the PMHNP reassigns all benefits to your group.
• Medicaid. Enroll with each state's program.
• Commercial plans. Confirm each agreement covers members in every state the PMHNP will serve.
• DEA. See our multi-state DEA guide.

Revalidation and Recredentialing

CMS says a late revalidation can put a hold on Medicare reimbursement and that it does not grant extensions (CMS). Between revalidation cycles, report a change of ownership, any adverse legal action, or a change, addition or deletion of a practice location to your Medicare contractor (MAC) within 30 days, and all other enrollment changes within 90 days (42 CFR 424.516). When a PMHNP leaves, terminate the reassignment (CMS-855I).

A Checklist for Billing on Day One

Work in this order, starting the day the offer is signed:

1. Documents. Collect the items above and verify each license on the board's site.
2. NPI. Check the NPI Registry, and have the PMHNP add your practice location in NPPES.
3. CAQH. The PMHNP completes and attests the profile, authorizes each plan, and gives your staff access.
4. Your enrollments. Confirm your Type 2 NPI, Medicare group enrollment, Medicaid enrollments and commercial contracts are current.
5. Medicare. File the CMS-855I with the reassignment in PECOS, signed by both parties, before the start date.
6. Medicaid. File in each state where you bill it.
7. Commercial plans. Apply to add the PMHNP to each contract, and ask about panel status, behavioral networks and timelines.
8. Follow-up. Answer requests the same day, and log each submission date and reference number.
9. Schedule. Get effective dates in writing, and book the first weeks with patients whose plans are already effective.
10. Calendar. Set reminders for CAQH attestation, revalidation, and every license, DEA and certification expiration.

Sources

• CMS, Medicare enrollment applications: https://www.cms.gov/medicare/enrollment-renewal/providers-suppliers/chain-ownership-system-pecos/enrollment-applications
• CMS, Form CMS-855B: https://www.cms.gov/medicare/cms-forms/cms-forms/downloads/cms855b.pdf
• CMS, Form CMS-855I: https://www.cms.gov/medicare/cms-forms/cms-forms/downloads/cms855i.pdf
• CMS, PECOS fact sheet: https://www.cms.gov/files/document/pecos-fact-sheet.pdf
• CMS, NPI fact sheet: https://www.cms.gov/files/document/npi-fact-sheet.pdf
• CMS, Medicare Program Integrity Manual, chapter 10: https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/downloads/pim83c10.pdf
• CMS, Advanced Practice Registered Nurses: https://www.cms.gov/medicare/payment/fee-schedules/physician-fee-schedule/advanced-practice-non-physician-practitioners/advanced-practice-registered-nurses-aprns
• CMS, Incident To Services and Supplies: https://www.cms.gov/medicare/payment/fee-schedules/physician-fee-schedule/advanced-practice-non-physician-practitioners/incident-services-supplies
• CMS, Revalidations: https://www.cms.gov/medicare/enrollment-renewal/providers-suppliers/revalidations
• Electronic Code of Federal Regulations, each section linked above: https://www.ecfr.gov
• DataSpring, powered by CAQH, For Clinicians: https://www.dataspring.com/clinicians
• Aetna, Join the Aetna network: https://www.aetna.com/health-care-professionals/join-the-aetna-network.html
• UnitedHealthcare, Join our network: https://www.uhcprovider.com/en/resource-library/Join-Our-Network/Medical-Provider.html
• Cigna Healthcare, Provider credentialing: https://www.cigna.com/health-care-providers/credentialing
• Optum Behavioral Health, Individually Credentialed Clinicians: https://public.providerexpress.com/content/ope-provexpr/us/en/our-network/individually-contracted-clinicians.html
• Texas Medicaid & Healthcare Partnership, Provider Enrollment: https://www.tmhp.com/topics/provider-enrollment

Post the Role on PMHNP Hiring

If you are still recruiting, our PMHNP job description template gives you a posting to adapt, and posting options are on the pricing page. When it is ready, post the PMHNP role on PMHNP Hiring, a job board for psychiatric mental health nurse practitioners.