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ROBERT FREDERICK WARBURTON ARNP
NPI 1477021764
Nurse Practitioner - Psychiatric/Mental Health in Tustin, CA

Active since November 05, 2018PECOS EnrolledAccepts Medicare Assignment
250 W MAIN ST STE 101, TUSTIN, CA 92780(714) 461-4121(385) 900-1673 Get Directions Write a Review

NPPES record last updated: November 14, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Nov 14, 2025, May 11, 2025, Oct 4, 2019 and 1 more (4 updates tracked since 2018).

About Robert Frederick Warburton Arnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ROBERT FREDERICK WARBURTON ARNP (NPI 1477021764) is an individual psychiatric/mental health provider in Tustin, California, licensed in California (95012975) and active in the NPI registry since November 2018. He is enrolled in Medicare PECOS and is a graduate of Other (2018).

NPPES Registry Identity

NPI1477021764
Entity TypeIndividualMale
Primary Taxonomy363LP0808X
Provider Legal NameROBERT FREDERICK WARBURTONCredential: ARNP
Location Address250 W MAIN ST STE 101Tustin, CA 92780-7717
Mailing Address250 W Main St Ste 101Tustin, CA 92780-7717 · (714) 461-4121 · Fax (385) 900-1673
Phone(714) 461-4121
Fax(385) 900-1673
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateNovember 5, 2018
Last NPPES UpdateNovember 14, 20254 updates tracked since enumeration
NPPES CertifiedNovember 14, 2025
✔ NPI 1477021764 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
Licenses✔ Licensed in CA · 95012975✔ Licensed in WA · 61527591✔ Licensed in AZ · 294766
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License ARNP9376910 (FL), 9376910 (CA)
250 W MAIN ST STE 101, Tustin, CA 92780
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Plan, Inc., UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Robert Frederick Warburton Arnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5698107662
PECOS Enrollment IDI20250811001905
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92780 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MERNA EISSA LMFT
Marriage & Family Therapist
250 W MAIN ST STE 101
TUSTIN, CA 92780
Orange County (949) 667-3125
HEATHER BRIDGE LMFT
Marriage & Family Therapist
250 W MAIN ST STE 101
TUSTIN, CA 92780
Orange County (714) 644-1988
NATALIE ASAWESNA INDIVIDUAL AND MARRIAGE THERAPY INC
Marriage & Family Therapist
250 W MAIN ST STE 101
TUSTIN, CA 92780
Orange County (562) 507-1751
NATALIE ASAWESNA LMFT
Marriage & Family Therapist
250 W MAIN ST STE 101
TUSTIN, CA 92780
Orange County (562) 507-1751
LISA PEARSON
Marriage & Family Therapist
250 W MAIN ST STE 101
TUSTIN, CA 92780
Orange County (949) 202-6024
BRIDGE 2 HAPPINESS
Marriage & Family Therapist
250 W MAIN ST STE 101
TUSTIN, CA 92780
Orange County (714) 644-1988

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Robert Warburton's NPI number?

The NPI number for Robert Warburton is 1477021764. It was assigned to this individual provider in the NPPES registry on November 5, 2018.

Where is Robert Warburton located?

Robert Warburton practices at 250 W Main St Ste 101, Tustin, CA 92780. The listed phone number is (714) 461-4121.

What is Robert Warburton's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Robert Warburton enrolled in Medicare?

Yes. Robert Warburton is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Robert Warburton accept?

Health plans from Oscar Health Plan, Inc. and UnitedHealthcare list Robert Warburton as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Robert Warburton was last updated on November 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.