Marie Mar Phan, PHARM. D.
Pharmacist · Walnut, CA
Marie Mar Phan, PHARM. D. is a pharmacist with a practice address in Walnut, California, and NPI 1386944379, issued on Oct 25, 2010. Check the license (California 47496, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marie Mar Phan
- Credential
- PHARM. D.
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 47496 CA
Self-reported in NPPES; status is on the state search - Practice location
- 350 N Lemon Ave, Walnut, CA 91789
- Phone
- (909) 595-7431
- Enumerated
- Oct 25, 2010
- Record last updated
- Oct 25, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (909) 595-7925
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Also registered at 350 N Lemon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Geeta Ganesh, PHARMDPharmacist1063716884
- Jennifer GrayStudent in an Organized Health Care Education/Training Program1386080539
Verify Marie Mar Phan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 47496Check 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, 97% of the cost of the top drugs
107 Medicare Part D claims for 90 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.
- Arexvy46 claims
- Shingrix45 claims
- Boostrix Tdap12 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.
Marie Mar Phan among 32,533 pharmacist records in California
Marie Mar Phan, PHARM. D. 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 2010, is newer than 12% of them.
- NPI issued2010 · 12% of these records are older, 82% 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 updated2010 · 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).
25 pharmacist records list a practice address in Walnut
They are 25 of the 317 NPPES records with a practice address in Walnut, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in Walnut → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Pattie Chi, PHARM.DWalnut, CA 917891215205513
- David Duncan, PHARMDWalnut, CA 917891124304951
- Howard Fang, R.PH.Walnut, CA 917891558615948
- Tiffany FongWalnut, CA 917891740750272
- Geeta Ganesh, PHARMDWalnut, CA 917891063716884
- Jamie HanWalnut, CA 917891013449180
- Esther KimWalnut, CA 917891992143226
- Christine Kim, PHARM.DWalnut, CA 917891871036103
Common questions
What is Marie Mar Phan, PHARM. D.'s NPI number?
Marie Mar Phan, PHARM. D.'s National Provider Identifier (NPI) is 1386944379, issued on Oct 25, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Marie Mar Phan, PHARM. D. located?
The NPPES record lists a practice address at 350 N Lemon Ave, Walnut, CA, 91789. Phone: (909) 595-7431. Providers update this record themselves, so call before visiting.
How can I verify Marie Mar Phan, PHARM. D.'s license?
NPPES lists California license number 47496, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Marie Mar Phan, PHARM. D. prescribe under Medicare Part D?
In 2024, Marie Mar Phan, PHARM. D. had 107 Medicare Part D claims for 90 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.