Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ronald Brent Farnsworth, PHD

Psychologist in San Antonio, TX · enumerated 2006.

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

National Provider Identifier

1679587109

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Registry record

Entity type Individual (Type 1)

Name Dr. Ronald Brent Farnsworth

Credential PHD

Sex Male

Practice address 4201 Medical Dr Ste 330, San Antonio, TX, 78229

Phone (210) 614-4990

Fax (210) 614-4991

Enumeration date Jul 28, 2006

Last updated in NPPES Dec 18, 2019

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 002055 (CT) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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

Is NPI 1679587109 active?

Yes, as of the latest NPPES snapshot, NPI 1679587109 is active (record last updated 2019-12-18).

How do I verify Ronald Farnsworth's NPI record?

Cross-check NPI 1679587109 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-18.