Tammy Renee Wegrzyn, NP
Family Nurse Practitioner · Riverside, CA
Tammy Renee Wegrzyn, NP is a family nurse practitioner with a practice address in Riverside, California, and NPI 1801123914, issued on Nov 10, 2009. Check the license (California 19081, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tammy Renee Wegrzyn
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 19081 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11705 Slate Ave, Riverside, CA 92505
- Phone
- (800) 274-3893
- Enumerated
- Nov 10, 2009
- Record last updated
- Feb 9, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100615000718); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 11705 Slate Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Roger Annabel, MDAdult Medicine Physician1760529176
- Edgar Ardila, MDCritical Care Medicine (Internal Medicine) Physician1295729648
- Farideh Ghasemi, FNPFamily Nurse Practitioner1023190014
- Humera Rana, M.D.Internal Medicine Physician1801982632
Verify Tammy Renee Wegrzyn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 19081Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average family nurse practitioner in 2024
1,012 Medicare Part D claims for 85 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium60 claims
- Xarelto49 claims
- Humalog Kwikpen U-10039 claims
- Levothyroxine Sodium38 claims
- Metoprolol Tartrate36 claims
- Famotidine33 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.
Bills Medicare through 2 group practices
- Hmts IncTustin, CA
- Optima Health CorpRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tammy Renee Wegrzyn among 16,966 family nurse practitioner records in California
Tammy Renee Wegrzyn, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 15% of them.
- NPI issued2009 · 15% of these records are older, 83% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2009 · median 2019 among the 6,793 with a school on file
- Record last updated2011 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
184 family nurse practitioner records list a practice address in Riverside
They are 184 of the 13,893 NPPES records with a practice address in Riverside, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Riverside → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Beatrice AkaniroRiverside, CA 925051942958905
- Richard Eric Atangan, FNP-BC, NP-CRiverside, CA 925051871245688
- Olubunmi Banjo, N.P.Riverside, CA 925051265830616
- Mary Brown, NPRiverside, CA 925051174021646
- Ly Duong, NPRiverside, CA 925051497261614
- Farideh Ghasemi, FNPRiverside, CA 925051023190014
- Christopher Grable, FNP-CRiverside, CA 925051255914511
- Ojiugo Odogwu, FNPRiverside, CA 925051497411003
Common questions
What is Tammy Renee Wegrzyn, NP's NPI number?
Tammy Renee Wegrzyn, NP's National Provider Identifier (NPI) is 1801123914, issued on Nov 10, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Tammy Renee Wegrzyn, NP located?
The NPPES record lists a practice address at 11705 Slate Ave, Riverside, CA, 92505. Phone: (800) 274-3893. Providers update this record themselves, so call before visiting.
How can I verify Tammy Renee Wegrzyn, NP's license?
NPPES lists California license number 19081, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Tammy Renee Wegrzyn, NP prescribe under Medicare Part D?
In 2024, Tammy Renee Wegrzyn, NP had 1,012 Medicare Part D claims for 85 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.