Credentialing for Nurse Practitioners: Insurance Enrollment Guide by Payer

Why NP Credentialing Is Different from Physician Credentialing

Nurse practitioners are credentialed and enrolled as independent providers — they hold their own NPI (Type 1 individual), build their own CAQH ProView profile, and apply to payers directly — but the process is more complicated than physician enrollment in three specific ways: taxonomy code selection, supervision documentation requirements, and prescriptive authority verification. Getting any of these wrong creates a denial that is often harder to reverse than to prevent.

Taxonomy Codes for Nurse Practitioners

The correct taxonomy code is the foundation of an NP's credentialing applications. Most payers credential NPs under the 363L taxonomy family (Nurse Practitioner), but the sub-specialty code matters:

• 363L00000X — Nurse Practitioner (general, no specialty designation)
• 363LA2100X — NP, Acute Care
• 363LC0200X — NP, Critical Care Medicine
• 363LF0000X — NP, Family
• 363LG0600X — NP, Gerontology
• 363LN0000X — NP, Neonatal
• 363LN0005X — NP, Neonatal (Critical Care)
• 363LP0200X — NP, Pediatrics
• 363LP0222X — NP, Pediatrics (Critical Care)
• 363LP1700X — NP, Psychiatric/Mental Health
• 363LP2300X — NP, Primary Care
• 363LS0200X — NP, School
• 363LW0102X — NP, Women's Health
• 363LX0001X — NP, Obstetrics & Gynecology
• 363LX0106X — NP, Occupational Health

Your CAQH ProView and NPPES taxonomy must match exactly. Payers cross-reference these databases and a mismatch is one of the most common NP credentialing denial reasons.

Medicare Enrollment for Nurse Practitioners

NPs enroll in Medicare using the CMS-855I (individual) form in PECOS. They enroll as non-physician practitioners (NPPs) under specialty code 50. Key points:

• NPs must hold an active state NP license in the state where they'll practice — Medicare does not credential the NP designation itself, so state law governs scope of practice
• Prescriptive authority documentation is generally required as part of the enrollment record
• Supervising physician documentation varies by state: in full-practice-authority (FPA) states, Medicare enrollment does not require a supervising physician on the application. In restricted-practice states, supervision agreements may need to be documented
• Medicare reimburses NPs at 85% of the physician fee schedule for most services; this is a statutory rate, not a negotiated one
• NPs can reassign benefits to a group practice entity in the same PECOS enrollment application

Medicaid Enrollment for Nurse Practitioners

State Medicaid programs vary significantly. NP enrollment requirements by general category:

• Full Practice Authority states (including Arizona, Colorado, Minnesota, Montana, New Mexico, Oregon, Washington, and most others as of 2026): NPs typically enroll independently with no supervising physician requirement on the Medicaid application
• Reduced/Restricted Practice states (including California, Florida, and a handful of others where the full FPA transition is still in progress): Medicaid applications may require a collaborating physician or written supervision agreement on file
• Most state Medicaid programs accept NP enrollment through their provider portal, with CAQH ProView feeding the credentialing data where the state has opted in to CAQH

Commercial Payer Enrollment by Payer

Aetna

Aetna credentials NPs directly and uses CAQH ProView as its primary data source. NPs apply through Aetna's provider portal or via NaviMedix. Supervision documentation requirements follow the state's scope of practice law. Average timeline: 60–90 days for commercial; Medicare Advantage timelines are separate. Aetna credentialing service.

UnitedHealthcare

UHC credentials NPs as NPPs and uses CAQH ProView. For UHC Community Plan (Medicaid) and Medicare Advantage products, separate enrollment may be required even if the provider is already in the commercial network. Timeline: 60–90 days; some markets run longer. UHC enrollment service.

BCBS Plans

Each BCBS state plan operates independently. NP requirements vary by plan — some require a supervising physician to be listed even in FPA states for certain product types (particularly BlueCard network applications). CAQH is accepted by most plans. Timeline: 60–90 days average, with some state plans taking longer.

Cigna

Cigna credentials NPs directly using CAQH ProView data. NPs must have their own individual Group Medical Group agreement if billing under a group NPI. Cigna enrollment service. Timeline: 60–90 days.

Humana

Humana enrolls NPs for both commercial and Medicare Advantage networks. CAQH ProView is the primary data source. Supervisory documentation requirements follow state law. Timeline: 60–90 days.

The CAQH ProView Setup for NPs

Your CAQH ProView profile is the foundation that feeds most payer applications simultaneously. For NPs specifically:

• Enter your NP license separately from any RN license you may hold — payers are credentialing the NP, not the underlying RN
• List the collaborating/supervising physician in the appropriate section if required by your state — even if your state is transitioning to FPA, document what was in effect during your practice history
• Upload current board certification (ANCC FNP-BC, AANP FNP-C, PMHNP-BC, ACNPC-AG, or whichever is applicable) — this is a primary credentialing criterion, not a supplemental document
• Attestation must be renewed every 90 days; a lapsed attestation silently blocks all payer applications without an error notification

ProEnrollment's NP Credentialing Service

ProEnrollment credentials nurse practitioners across all 50 states with a pre-submission audit specifically calibrated for NP-specific failure points: taxonomy mismatch, supervision documentation, prescriptive authority, and CAQH completeness. The service covers Medicare PECOS enrollment, state Medicaid, CAQH ProView setup or audit, and multi-payer commercial enrollment under one engagement. NP credentialing details | free consultation.

Nurse Practitioner Credentialing FAQ