Olivia Chen
Pharmacist · Cypress, CA
Olivia Chen is a pharmacist with a practice address in Cypress, California, and NPI 1851876262, issued on Oct 2, 2018. Check the license (California 79067, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Olivia Chen
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 79067 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5401 Katella Ave, Cypress, CA 90720
- Phone
- (562) 668-5178
- Enumerated
- Oct 2, 2018
- Record last updated
- Oct 2, 2018 (not updated in 8 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 5401 Katella Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Janice SonPharmacist1902417850
- Ting Tse, PHARM DPharmacist1437380573
Verify Olivia Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 79067Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 95% of the cost of the top drugs
155 Medicare Part D claims for 135 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Shingrix61 claims
- Abrysvo42 claims
- Boostrix Tdap24 claims
- Arexvy21 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.
Olivia Chen among 32,533 pharmacist records in California
Olivia Chen 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 2018, is newer than 61% of them.
- NPI issued2018 · 61% of these records are older, 33% 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 updated2018 · 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).
60 pharmacist records list a practice address in Cypress
They are 60 of the 631 NPPES records with a practice address in Cypress, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in Cypress → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Sevin Ataie, PHARMDLos Alamitos, CA 907201386950608
- Kelly Bond, PHARMDLos Alamitos, CA 907201912232588
- Jameel Chaugule, R. PH.Los Alamitos, CA 907201770606451
- Jon CombesCypress, CA 907201962777144
- Kaleena Enany, PHARMDLos Alamitos, CA 907201912324260
- Tracie Onaha-Nguyen, PHARM. D.Los Alamitos, CA 907201841467107
- Kinnari PatelLos Alamitos, CA 907201366760357
- Kaylyn Pham, PHARMDLos Alamitos, CA 907201154673424
Common questions
What is Olivia Chen's NPI number?
Olivia Chen's National Provider Identifier (NPI) is 1851876262, issued on Oct 2, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Olivia Chen located?
The NPPES record lists a practice address at 5401 Katella Ave, Cypress, CA, 90720. Phone: (562) 668-5178. Providers update this record themselves, so call before visiting.
How can I verify Olivia Chen's license?
NPPES lists California license number 79067, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Olivia Chen prescribe under Medicare Part D?
In 2024, Olivia Chen had 155 Medicare Part D claims for 135 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.