William H. Diamant, PHARM.D.
Pharmacist · Norwalk, CA
William H. Diamant, PHARM.D. is a pharmacist with a practice address in Norwalk, California, and NPI 1033491568, issued on Sep 10, 2011. Check the license (California RPH30352, 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
- William H. Diamant
- Credential
- PHARM.D.
- Primary taxonomy
- Pharmacist 183500000X
- License number
- RPH30352 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11930 Studebaker RD, Norwalk, CA 90650
- Phone
- (562) 864-8138
- Enumerated
- Sep 10, 2011
- Record last updated
- Sep 10, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (562) 929-8489
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Also registered at 11930 Studebaker RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Se Bunny Hok, PHARMACISTPharmacist1780355859
- Ifeyinwa OkekePharmacist1811279979
- Martha Prieto, PHARMD/MPHPharmacist1881962793
- Nicholas Tedjakesuma, PHARM DPharmacist1952922742
Verify William H. Diamant in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license RPH30352Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William H. Diamant among 32,533 pharmacist records in California
William H. Diamant, 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 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).
67 pharmacist records list a practice address in Norwalk
They are 67 of the 1,600 NPPES records with a practice address in Norwalk, 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 Norwalk → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Susana CuanNorwalk, CA 906501770869075
- Anand JethvaNorwalk, CA 906501285850800
- Michael KamNorwalk, CA 906501528346350
- Stuart Koizumi, PHARM.D.Norwalk, CA 906501063796233
- Melanie MaNorwalk, CA 906501548581259
- Tuyet-Nga Nguyen, RPHNorwalk, CA 906501538437439
- Ifeyinwa OkekeNorwalk, CA 906501811279979
- Kevin Park, PHARM.D.Norwalk, CA 906501538456710
Common questions
What is William H. Diamant, PHARM.D.'s NPI number?
William H. Diamant, PHARM.D.'s National Provider Identifier (NPI) is 1033491568, issued on Sep 10, 2011. An NPI identifies a provider in billing; it is not a license.
Where is William H. Diamant, PHARM.D. located?
The NPPES record lists a practice address at 11930 Studebaker RD, Norwalk, CA, 90650. Phone: (562) 864-8138. Providers update this record themselves, so call before visiting.
How can I verify William H. Diamant, PHARM.D.'s license?
NPPES lists California license number RPH30352, 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.