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

Tammy O'Riley, FNP-C

Individual provider Nurse Practitioner · NPI 1235413436

Tammy O'Riley, FNP-C is a Nurse Practitioner in San Diego, California. Qualified in 1997, 29 years ago. Practices with Regents of the University of California, a 2,061-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Arizona and California.

Years since qualifying
29
Licensed in
AZ, CA
In the registry since
2011
Specialties on file
2
What do these letters mean?
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

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Practice location Address checks out

200 W Arbor Dr
San Diego, CA 92103-9000
Phone: (800) 926-8273
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 10815 W McDowell Rd Ste 304, Avondale, AZ 85392-5016 — (602) 494-5040

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence NP9154 (CA)
Nurse Practitioner Taxonomy 363L00000X · Licence AP0624 (AZ)

Record details

NPI number1235413436
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-C
Sole proprietorNo
NPI enumeratedOctober 6, 2011
Last updated in NPPESNovember 9, 2020
Certification dateNovember 9, 2020

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice Regents Of The University Of California — 2061 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients139
Services billed 690 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Regents of the University of California

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2061 clinicians in the practice; 12 are shown here.

Other providers in San Diego