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Dr. Thomas Eugene Loncar, M.D.

Surgery Physician in Eureka, CA · enumerated 2006.

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

National Provider Identifier

1710915319

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Registry record

Entity type Individual (Type 1)
Name Dr. Thomas Eugene Loncar
Credential M.D.
Sex Male
Practice address 2321 Harrison Ave, Eureka, CA, 95501
Phone (707) 442-8500
Fax (707) 476-8431
Enumeration date Jun 30, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License C037140 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
00C371400 Medicaid CA -

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 1710915319 active?
Yes, as of the latest NPPES snapshot, NPI 1710915319 is active (record last updated 2007-07-08).
How do I verify Thomas Loncar's NPI record?
Cross-check NPI 1710915319 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 2007-07-08.