Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Robert Frederick Warburton, ARNP

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1477021764

Robert Frederick Warburton, ARNP is a Nurse Practitioner in Tustin, California. Qualified in 2018, 8 years ago. Accepts Medicare assignment. Licensed in Arizona, California, Florida and Washington.

Years since qualifying
8
Licensed in
AZ, CA, FL, WA
In the registry since
2018
Specialties on file
5
What do these letters mean?
ARNP — Advanced Registered Nurse Practitioner
The title some states use for an advanced practice nurse.

See every abbreviation used in this directory →

Practice location Address checks out

250 W Main St Ste 101
Tustin, CA 92780-7717
Phone: (714) 461-4121
Fax: (385) 900-1673
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence 95012975 (CA)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 61527591 (WA)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 294766 (AZ)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence ARNP9376910 (FL)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 9376910 (CA)

Record details

NPI number1477021764
Entity typeIndividual (Type 1)
GenderMale
Credentials ARNP
Sole proprietorNo
NPI enumeratedNovember 5, 2018
Last updated in NPPESNovember 14, 2025
Certification dateNovember 14, 2025
Mailing address250 W Main St Ste 101, Tustin, CA 92780-7717

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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