Gerald Siazon, PHARM D
Pharmacist · Chatsworth, CA
Gerald Siazon, PHARM D is a pharmacist with a practice address in Chatsworth, California, and NPI 1689956039, issued on Sep 12, 2011. Check the license (California 62285, 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
- Gerald Siazon
- Credential
- PHARM D
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 62285 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20901 Devonshire St, Chatsworth, CA 91311
- Phone
- (818) 341-4339
- Enumerated
- Sep 12, 2011
- Record last updated
- Sep 12, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (818) 341-4713
- Entity
- Type 1 · individual
Also registered at 20901 Devonshire St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dina Alemi, RPHPharmacist1801408786
- Sharon BaePharmacist1073270906
- Pegah Golpanian, PHARMDPharmacist1821430026
- Jennifer MatianPharmacist1568886158
Verify Gerald Siazon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 62285Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26 pharmacist records list a practice address in Chatsworth
They are 26 of the 498 NPPES records with a practice address in Chatsworth, and 32,533 pharmacist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 26 in Chatsworth → All 32,533 in California → Every provider in Chatsworth →
Other pharmacist records in California
- Caroline A-Haja, PHARM.D.San Pedro, CA1851664361
- Gayatri AachiLivermore, CA1235660754
- Adrian Karlos Aala, PHARMD, RPHHayward, CA1023955499
- Mahshid Aalam, PHARMDLos Angeles, CA1659086155
- Jaleh AaliiveliSan Ramon, CA1336629963
- Cassi Aarvig, RPHTracy, CA1023679941
- Meara Michi AbadOrange, CA1750181178
- Nader Abadier, RPHFontana, CA1326255647
- Samia Abadier, RPHFontana, CA1548742836
- Sandy Abadir, RPHChino Hills, CA1811644412
Common questions
What is Gerald Siazon, PHARM D's NPI number?
Gerald Siazon, PHARM D's National Provider Identifier (NPI) is 1689956039, issued on Sep 12, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Gerald Siazon, PHARM D located?
The NPPES record lists a practice address at 20901 Devonshire St, Chatsworth, CA, 91311. Phone: (818) 341-4339. Providers update this record themselves, so call before visiting.
How can I verify Gerald Siazon, PHARM D's license?
NPPES lists California license number 62285, 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.