Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Viseth Siem, PHARMD

Pharmacist in Stockton, CA · enumerated 2014.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1750790812

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Registry record

Entity type Individual (Type 1)

Name Dr. Viseth Siem

Credential PHARMD

Sex Male

Practice address 10355 Trinity Pkwy, Stockton, CA, 95219

Phone (209) 235-1505

Fax (209) 235-1498

Enumeration date Aug 3, 2014

Last updated in NPPES Aug 3, 2014

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 57731 (CA) Primary

PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Viseth Siem?

Viseth Siem is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-08-03.