NPPES file of Aug 9, 2026

Robert Frederick Warburton, ARNP

Psychiatric/Mental Health Nurse Practitioner · Tustin, CA

Robert Frederick Warburton, ARNP is a psychiatric/mental health nurse practitioner with a practice address in Tustin, California, and NPI 1477021764, issued on Nov 5, 2018. Check the license (California 95012975, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1477021764
Name
Robert Frederick Warburton
Credential
ARNP
Primary taxonomy
Psychiatric/Mental Health Nurse Practitioner 363LP0808X
License numbers
95012975 CA
9376910 CA
294766 AZ
ARNP9376910 FL
61527591 WA
Self-reported in NPPES; status is on the state search
Practice location
250 W Main St Ste 101, Tustin, CA 92780
Phone
(714) 461-4121
Enumerated
Nov 5, 2018
Record last updated
Nov 14, 2025
Fax
(385) 900-1673
Medicare enrollment
Enrolled (PECOS I20250811001905); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest psychiatric/mental health nurse practitioner records → All 4,226 in California → Look up another NPI →

Also registered at 250 W Main St Ste 101

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Natalie Asawesna, LMFTMarriage & Family Therapist1710371778
  2. Heather Bridge, LMFTMarriage & Family Therapist1225782568
  3. Merna Eissa, LMFTMarriage & Family Therapist1073163416
  4. Lisa PearsonMarriage & Family Therapist1790326577

Verify Robert Frederick Warburton in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 95012975    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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Robert Frederick Warburton among 4,226 psychiatric/mental health nurse practitioner records in California

Robert Frederick Warburton, ARNP is one of 4,226 psychiatric/mental health nurse practitioner records with a practice address in California. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2018, is newer than 30% of them.

  • NPI issued2018 · 30% of these records are older, 65% newer
  • In a Medicare fileNo · 62% of these records are
  • In the CMS Doctors and Clinicians fileYes · 46% of these records are
  • Graduated2018 · median 2021 among the 1,965 with a school on file
  • Record last updated2025 · 16% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Psychiatric/Mental Health Nurse Practitioner providers in California

There are 4,226 psychiatric/mental health nurse practitioner records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 4,226 in California → Every provider in Tustin → Psychiatric/Mental Health Nurse Practitioner nationwide →

The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes

  1. Christopher Caovan, NP-CTustin, CA 927801295686970
  2. Deedee Chukuka, NURSE PRACTITIONERTustin, CA 927801154104982
  3. Aneta Giz, NP-CTustin, CA 927801487432340
  4. Crystal Johnson, RN, PMHNP-BCTustin, CA 927801467286781
  5. Michael Kelly, NPTustin, CA 927801003206004
  6. Susan MaTustin, CA 927801154120814
  7. Charles Nguyen, NPTustin, CA 927801376477794
  8. Julia SamarinTustin, CA 927801003793738

Common questions

What is Robert Frederick Warburton, ARNP's NPI number?

Robert Frederick Warburton, ARNP's National Provider Identifier (NPI) is 1477021764, issued on Nov 5, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Robert Frederick Warburton, ARNP located?

The NPPES record lists a practice address at 250 W Main St Ste 101, Tustin, CA, 92780. Phone: (714) 461-4121. Providers update this record themselves, so call before visiting.

How can I verify Robert Frederick Warburton, ARNP's license?

NPPES lists California license number 95012975, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.