Tammy O'Riley, FNP-C
Nurse Practitioner · San Diego, CA
Tammy O'Riley, FNP-C is a nurse practitioner with a practice address in San Diego, California, and NPI 1235413436, issued on Oct 6, 2011. Check the license (California NP9154, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tammy O'Riley
- Credential
- FNP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- NP9154 CA
AP0624 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Arbor Dr, San Diego, CA 92103
- Phone
- (800) 926-8273
- Enumerated
- Oct 6, 2011
- Record last updated
- Nov 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 582347 AZ
- Medicare enrollment
- Enrolled (PECOS I20201118002956); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Also registered at 200 W Arbor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kristy AbelCertified Registered Nurse Anesthetist1962113035
- Paula Abeleda, NPFamily Nurse Practitioner1558945022
Verify Tammy O'Riley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP9154Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average nurse practitioner in 2024
1,489 Medicare Part D claims for 213 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 70% of claims.
Most prescribed
- Mounjaro126 claims
- Nano 2nd Gen Pen Needle109 claims
- Ozempic86 claims
- Trulicity86 claims
- Jardiance83 claims
- Metformin Hcl Er76 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $98.12
3 payments; by number, the most common kind was food and beverage; the largest payer was Insulet Corporation. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tammy O'Riley among 8,223 nurse practitioner records in California
Tammy O'Riley, FNP-C is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 34% of them.
- NPI issued2011 · 34% of these records are older, 63% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated1997 · median 2017 among the 3,425 with a school on file
- Record last updated2020 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in California
There are 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in San Diego → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Maureen Benetti, N.P.San Diego, CA 921031518994466
- Pamela Conner, NPSan Diego, CA 921031770558967
- Vicki Faucher, FNPSan Diego, CA 921031295724375
- Jeremy Flowers, N.P.San Diego, CA 921031013913045
- Richard Keedy, F.N.P.San Diego, CA 921031265460695
- Youngmi Kim, N.P.San Diego, CA 921031720089618
- Karen Macauley, CFNPSan Diego, CA 921031992756621
- Michael Magliocca, NPSan Diego, CA 921031821063538
Common questions
What is Tammy O'Riley, FNP-C's NPI number?
Tammy O'Riley, FNP-C's National Provider Identifier (NPI) is 1235413436, issued on Oct 6, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Tammy O'Riley, FNP-C located?
The NPPES record lists a practice address at 200 W Arbor Dr, San Diego, CA, 92103. Phone: (800) 926-8273. Providers update this record themselves, so call before visiting.
How can I verify Tammy O'Riley, FNP-C's license?
NPPES lists California license number NP9154, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Tammy O'Riley, FNP-C prescribe under Medicare Part D?
In 2024, Tammy O'Riley, FNP-C had 1,489 Medicare Part D claims for 213 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
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.