Jaclyn M. Grentzer, MD, MSCI
Complex Family Planning Physician · Riverside, CA
Jaclyn M. Grentzer, MD, MSCI is a complex family planning physician with a practice address in Riverside, California, and NPI 1215240338, issued on Jul 18, 2010. Check the license (California A145051, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jaclyn M. Grentzer
- Credential
- MD, MSCI
- Primary taxonomy
- Complex Family Planning Physician 207VC0300X
- License number
- A145051 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10800 Magnolia Ave, Riverside, CA 92505
- Phone
- (833) 574-2273
- Enumerated
- Jul 18, 2010
- Record last updated
- Jul 22, 2025
- Entity
- Type 1 · individual
Also registered at 10800 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Abapo, MDPediatrics Physician1841348786
- Hussein Abdulrassoul, MDOrthopaedic Surgery Physician1972123891
- Kimberly Adams, PA-CMedical Physician Assistant1053522870
- Alfredo Aguiar, PAPhysician Assistant1043368970
- Michael Aguinaldo, M.D.Pediatrics Physician1851531487
- Maria Aguirre, MDPediatrics Physician1295806255
Verify Jaclyn M. Grentzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A145051Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average complex family planning physician in 2024
28 Medicare Part D claims, against an average of 28 among the 44 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of 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.
Complex Family Planning Physician providers in California
There are 23 complex family planning physician records in California.
Other complex family planning physician records in California
- Paul Blumenthal, MDStanford, CA1336202977
- Erica Cahill, MDStanford, CA1871936351
- Jayne Caron, MDPalo Alto, CA1780213819
- Melissa Chen, M.D., M.P.H.Sacramento, CA1144541582
- Mitchell Creinin, MDSacramento, CA1801868484
- Natalie Dicenzo, MDSacramento, CA1174148027
- Anne Flynn, MDSacramento, CA1326435447
- Karen Greiner, MD, MPHLa Jolla, CA1427686930
- Maryam Guiahi, M.D.Santa Barbara, CA1386805521
- Andrea Henkel, MDStanford, CA1003279209
Common questions
What is Jaclyn M. Grentzer, MD, MSCI's NPI number?
Jaclyn M. Grentzer, MD, MSCI's National Provider Identifier (NPI) is 1215240338, issued on Jul 18, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Jaclyn M. Grentzer, MD, MSCI located?
The NPPES record lists a practice address at 10800 Magnolia Ave, Riverside, CA, 92505. Phone: (833) 574-2273. Providers update this record themselves, so call before visiting.
How can I verify Jaclyn M. Grentzer, MD, MSCI's license?
NPPES lists California license number A145051, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jaclyn M. Grentzer, MD, MSCI prescribe under Medicare Part D?
In 2024, Jaclyn M. Grentzer, MD, MSCI had 28 Medicare Part D claims; the average among complex family planning physician prescribers was 28. 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.