Gustavo Martinez, RPH
Pharmacist · Ontario, CA
Gustavo Martinez, RPH is a pharmacist with a practice address in Ontario, California, and NPI 1619561818, issued on Feb 27, 2021. Check the license (California 84088, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gustavo Martinez
- Credential
- RPH
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 84088 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2295 S Vineyard Ave Bldg D, Ontario, CA 91761
- Phone
- (909) 724-3120
- Enumerated
- Feb 27, 2021
- Record last updated
- Feb 27, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Also registered at 2295 S Vineyard Ave Bldg D
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gustavo Martinez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 84088Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15.4 times the Medicare Part D claims of the average pharmacist in 2024
1,837 Medicare Part D claims for 639 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Atorvastatin Calcium245 claims
- Ozempic141 claims
- Amlodipine Besylate137 claims
- Lisinopril137 claims
- Losartan Potassium122 claims
- Metformin Hcl Er92 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.
Gustavo Martinez among 32,533 pharmacist records in California
Gustavo Martinez, RPH is one of 32,533 pharmacist records with a practice address in California. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 79% of them.
- NPI issued2021 · 79% of these records are older, 16% newer
- In a Medicare fileYes · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2021 · 76% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
88 pharmacist records list a practice address in Ontario
They are 88 of the 5,375 NPPES records with a practice address in Ontario, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in Ontario → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Bann Aboudi AllyasOntario, CA 917611891016184
- Marissa Alaniz, PHARM.D.Ontario, CA 917611508146093
- Rong-Cheng Chang, PHARM.D.Ontario, CA 917611093850828
- Tapasya DesaiOntario, CA 917611689045155
- Linda Ekeomodi, RPHOntario, CA 917611033323977
- Timothy FungOntario, CA 917611215308697
- Helen Lim, PHARM.D.Ontario, CA 917611992148522
- Christine Ramos, PHARM.D.Ontario, CA 917611003939083
Common questions
What is Gustavo Martinez, RPH's NPI number?
Gustavo Martinez, RPH's National Provider Identifier (NPI) is 1619561818, issued on Feb 27, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Gustavo Martinez, RPH located?
The NPPES record lists a practice address at 2295 S Vineyard Ave Bldg D, Ontario, CA, 91761. Phone: (909) 724-3120. Providers update this record themselves, so call before visiting.
How can I verify Gustavo Martinez, RPH's license?
NPPES lists California license number 84088, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Gustavo Martinez, RPH prescribe under Medicare Part D?
In 2024, Gustavo Martinez, RPH had 1,837 Medicare Part D claims for 639 beneficiaries; the average among pharmacist prescribers was 119. 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.