Mark Stephen Harris, DDS
Mark Stephen Harris is a General Practice Dentistry provider (Dentist) practicing in Eureka, CA, registered in the NPPES registry with NPI 1427002385 since 2006. The credential DDS stands for Doctor of Dental Surgery. Practices at T.F. Vert DDS.P.C. (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1427002385 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mark Stephen Harris |
| Credential | DDS |
| Sex | Male |
| Practice address | 831 HARRIS ST, Eureka, CA, 95503 |
| Phone | 7074438367 |
| Fax | 7074432371 |
| Enumeration date | 2006-05-22 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry | Primary | 24456 | CA |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: Mark Harris, DDS NPI: 1427002385 Taxonomy: 1223G0001X (General Practice Dentistry) Address: 831 HARRIS ST, Eureka, CA, 95503
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1215931118 | Thomas Vert | Individual | General Practice Dentistry | Eureka, CA |
| 1144241373 | T.F. Vert DDS.P.C. | Organization | General Practice Dentistry | Eureka, CA |
| 1497865554 | Roger Miller | Individual | General Practice Dentistry | Eureka, CA |
| 1013185990 | Jason Wolven | Individual | General Practice Dentistry | Eureka, CA |
| 1164835534 | William Speer | Individual | Audiologist | Eureka, CA |
Verify this record
Cross-check NPI 1427002385 against the authoritative CMS record: view Mark Stephen Harris 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 1427002385 active?
How do I verify Mark Harris's NPI record?
Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2007-07-08.