Kathlynn Uyen Chu, PHARMD
Pharmacist · Ontario, CA
Kathlynn Uyen Chu, PHARMD is a pharmacist with a practice address in Ontario, California, and NPI 1316113400, issued on May 8, 2008. Check the license (California 55675, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Kathlynn Uyen Chu
- Credential
- PHARMD
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 55675 CA
Self-reported in NPPES; status is on the state search - Practice location
- 222 W G St, Ontario, CA 91762
- Phone
- (909) 984-3913
- Enumerated
- May 8, 2008
- Record last updated
- May 8, 2008 (not updated in 18 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 222 W G St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Su-Ching Fann, R.PH.Pharmacist1942516075
- Becky Goble, PHARMACY TECHNICIANPharmacy Technician1306420518
- Nahla HozainPharmacist1043506918
- Thanh VinhPharmacist1760701148
Verify Kathlynn Uyen Chu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 55675Check 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, 94% of the cost of the top drugs
62 Medicare Part D claims for 50 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.
- Shingrix30 claims
- Abrysvo15 claims
- Boostrix Tdap11 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.
Kathlynn Uyen Chu among 32,533 pharmacist records in California
Kathlynn Uyen Chu, PHARMD 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 2008, is newer than 9% of them.
- NPI issued2008 · 9% of these records are older, 89% 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 updated2008 · 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
- Vivian ChouOntario, CA 917621508142308
- Hong Yen DangOntario, CA 917621447673470
- Su-Ching Fann, R.PH.Ontario, CA 917621942516075
- Minh Tram Ho, PHARM.D.Ontario, CA 917621770953028
- Nahla HozainOntario, CA 917621043506918
- Jong Lee, PHARM.DOntario, CA 917621497075899
- Gerard Leong, PHARM.D.Ontario, CA 917621215346697
- Jenny LuOntario, CA 917621114336922
Common questions
What is Kathlynn Uyen Chu, PHARMD's NPI number?
Kathlynn Uyen Chu, PHARMD's National Provider Identifier (NPI) is 1316113400, issued on May 8, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Kathlynn Uyen Chu, PHARMD located?
The NPPES record lists a practice address at 222 W G St, Ontario, CA, 91762. Phone: (909) 984-3913. Providers update this record themselves, so call before visiting.
How can I verify Kathlynn Uyen Chu, PHARMD's license?
NPPES lists California license number 55675, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Kathlynn Uyen Chu, PHARMD prescribe under Medicare Part D?
In 2024, Kathlynn Uyen Chu, PHARMD had 62 Medicare Part D claims for 50 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.