Nathaniel Duncan, PHARMD
Pharmacist · San Mateo, CA
Nathaniel Duncan, PHARMD is a pharmacist with a practice address in San Mateo, California, and NPI 1740647619, issued on Jan 24, 2016. Check the license (California 67332, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nathaniel Duncan
- Credential
- PHARMD
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 67332 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4242 S EL Camino Real, San Mateo, CA 94403
- Phone
- (650) 573-5521
- Enumerated
- Jan 24, 2016
- Record last updated
- Jan 24, 2016 (not updated in 10 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 4242 S EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nancy NguyenPharmacist1992650055
- Jazlyn Quintana, RPHPharmacist1417803560
- Cecily SunPharmacist1326577735
Verify Nathaniel Duncan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 67332Check 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, 100% of the cost of the top drugs
61 Medicare Part D claims for 53 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.
- Arexvy27 claims
- Shingrix23 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.
Nathaniel Duncan among 32,533 pharmacist records in California
Nathaniel Duncan, 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 2016, is newer than 47% of them.
- NPI issued2016 · 47% of these records are older, 47% 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 updated2016 · 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).
84 pharmacist records list a practice address in San Mateo
They are 84 of the 3,909 NPPES records with a practice address in San Mateo, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in San Mateo → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Kaylee Bui, PHARMDSan Mateo, CA 944031134559214
- Becky Embrey, PHARM.D.San Mateo, CA 944031669682415
- Gary Horne, PHARMACISTSan Mateo, CA 944031245413178
- Derek Huang, PHARMDSan Mateo, CA 944031588737431
- Masao Kaku, PHARM DSan Mateo, CA 944031063731446
- Amy Kwan, PHARM.D.San Mateo, CA 944031922380898
- Lydia LawSan Mateo, CA 944031457636581
- Vivian Ly, PHARM.D.San Mateo, CA 944031376824573
Common questions
What is Nathaniel Duncan, PHARMD's NPI number?
Nathaniel Duncan, PHARMD's National Provider Identifier (NPI) is 1740647619, issued on Jan 24, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Nathaniel Duncan, PHARMD located?
The NPPES record lists a practice address at 4242 S EL Camino Real, San Mateo, CA, 94403. Phone: (650) 573-5521. Providers update this record themselves, so call before visiting.
How can I verify Nathaniel Duncan, PHARMD's license?
NPPES lists California license number 67332, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Nathaniel Duncan, PHARMD prescribe under Medicare Part D?
In 2024, Nathaniel Duncan, PHARMD had 61 Medicare Part D claims for 53 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.