Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Greta Diane Upton, PHARMD

Pharmacist in Fairfield, CA · enumerated 2016.

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

National Provider Identifier

1417492398

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Registry record

Entity type Individual (Type 1)

Name Dr. Greta Diane Upton

Credential PHARMD

Sex Female

Practice address 1200 B Gale Wilson Blvd, Fairfield, CA, 94533

Phone (775) 742-0044

Enumeration date Dec 30, 2016

Last updated in NPPES Dec 30, 2016

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 71336 (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 Greta Upton?

Greta Upton 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 2016-12-30.