Tammy Sims, M. D.
Specialist · Riverside, CA
Tammy Sims, M. D. is a specialist with a practice address in Riverside, California, and NPI 1043490246, issued on Nov 6, 2007. Check the license with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Tammy Sims
- Credential
- M. D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 16949 MS
Self-reported in NPPES; status is on the state search - Practice location
- 3390 University Ave Ste 100, Riverside, CA 92501
- Phone
- (844) 827-8000
- Enumerated
- Nov 6, 2007
- Record last updated
- Dec 30, 2024
- Medicaid ID
- 04583552 MS
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 3390 University Ave Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Tammy Sims in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Tammy Sims among 5,749 specialist records in California
Tammy Sims, M. D. is one of 5,749 specialist records with a practice address in California. 30% 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 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 44% newer
- In a Medicare fileNo · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2024 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,749 in California → Every provider in Riverside → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Thomas Bartczak, C.O.Riverside, CA 925011366673311
- Brian Choi, M.D.Riverside, CA 925011386602720
- Michael Coe, H.A.D.Riverside, CA 925011043587256
- Bette GraffRiverside, CA 925011295350668
- Hilario Marilao, M.D.Riverside, CA 925011568502425
- Rafael Marroquin, 989057Riverside, CA 925011396960134
- Lieu Rupp, M.D.Riverside, CA 925011508957127
- Vanessa AvalosRiverside, CA 925031396445029
Common questions
What is Tammy Sims, M. D.'s NPI number?
Tammy Sims, M. D.'s National Provider Identifier (NPI) is 1043490246, issued on Nov 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tammy Sims, M. D. located?
The NPPES record lists a practice address at 3390 University Ave Ste 100, Riverside, CA, 92501. Phone: (844) 827-8000. Providers update this record themselves, so call before visiting.
How can I verify Tammy Sims, M. D.'s license?
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.
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.