Dr. Thomas Eugene Loncar, M.D.
Dr. Thomas Eugene Loncar is a Surgery Physician provider (Surgery) practicing in Eureka, CA, registered in the NPPES registry with NPI 1710915319 since 2006. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1710915319 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Thomas Eugene Loncar |
| Credential | M.D. |
| Sex | Male |
| Practice address | 2321 HARRISON AVE, Eureka, CA, 95501 |
| Phone | 7074428500 |
| Fax | 7074768431 |
| Enumeration date | 2006-06-30 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Primary | C037140 | CA |
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 | — |
Copy-ready billing details
Provider: Thomas Loncar, M.D. NPI: 1710915319 Taxonomy: 208600000X (Surgery Physician) Address: 2321 HARRISON AVE, Eureka, CA, 95501
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1497832190 | John Vanspeybroeck | Individual | Surgery Physician | Eureka, CA |
| 1184781536 | Thomas Rydz | Individual | Surgery Physician | Eureka, CA |
| 1669539862 | Michael Palmer | Individual | Surgery Physician | Eureka, CA |
| 1174651913 | Amber Hoffman | Individual | Family Nurse Practitioner | Eureka, CA |
| 1033315635 | Kathryn Stollmeyer | Individual | Physician Assistant | Eureka, CA |
| 1326246828 | North Coast Surgical Specialists | Organization | Surgery Physician | Eureka, CA |
| 1255586194 | Michael A. Palmer, M.D., F.A.C.S. A Medical Corporation | Organization | Vascular Surgery Physician | Eureka, CA |
| 1639404353 | Huy Trieu | Individual | Surgery Physician | Eureka, CA |
Verify this record
Cross-check NPI 1710915319 against the authoritative CMS record: view Dr. Thomas Eugene Loncar on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
Is NPI 1710915319 active?
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.