Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Diane E. Tobias, PHARM.D., CGP

Q: What is the NPI number for Diane Tobias?

The National Provider Identifier (NPI) for Diane Tobias is 1023229390, a Type 1 (individual) record in the CMS NPPES registry.

Geriatric Pharmacist in Davis, CA · enumerated 2007.

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

National Provider Identifier

1023229390

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Registry record

Entity type Individual (Type 1)

Name Dr. Diane E. Tobias

Credential PHARM.D., CGP

Sex Female

Practice address Davis, CA, 95616

Phone (530) 759-9877

Enumeration date May 25, 2007

Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1835G0303X Geriatric Pharmacist Pharmacy Service Providers · License 27360 (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 is the NPI number for Diane Tobias?

The National Provider Identifier (NPI) for Diane Tobias is 1023229390, a Type 1 (individual) record in the CMS NPPES registry.

Where does Diane Tobias practice?

The practice location on file with NPPES is in Davis, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.