David Steven Duncan, PHARMD
Pharmacist · Walnut, CA
David Steven Duncan, PHARMD is a pharmacist with a practice address in Walnut, California, and NPI 1124304951, issued on Oct 25, 2011. Check the license (California 57235, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- David Steven Duncan
- Credential
- PHARMD
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 57235 CA
Self-reported in NPPES; status is on the state search - Practice location
- 19755 Vista Hermosa Dr, Walnut, CA 91789
- Phone
- (909) 881-1813
- Enumerated
- Oct 25, 2011
- Record last updated
- Oct 25, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (909) 881-6694
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Verify David Steven 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 57235Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
David Steven Duncan among 32,533 pharmacist records in California
David Steven 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 not. Its NPI, issued in 2011, is newer than 18% of them.
- NPI issued2011 · 18% of these records are older, 72% newer
- In a Medicare fileNo · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2011 · 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
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
- 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
- Susan LiWalnut, CA 917891992239065
Common questions
What is David Steven Duncan, PHARMD's NPI number?
David Steven Duncan, PHARMD's National Provider Identifier (NPI) is 1124304951, issued on Oct 25, 2011. An NPI identifies a provider in billing; it is not a license.
Where is David Steven Duncan, PHARMD located?
The NPPES record lists a practice address at 19755 Vista Hermosa Dr, Walnut, CA, 91789. Phone: (909) 881-1813. Providers update this record themselves, so call before visiting.
How can I verify David Steven Duncan, PHARMD's license?
NPPES lists California license number 57235, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.