Dr. William Breen, DDS
Dr. William Breen is a General Practice Dentistry provider (Dentist) practicing in Eugene, OR, registered in the NPPES registry with NPI 1164517405 since 2006. The credential DDS stands for Doctor of Dental Surgery. Practices at Patrick D. Landau, D.C.,P.C. (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1164517405 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. William Breen |
| Credential | DDS |
| Sex | Male |
| Practice address | 895 COUNTRY CLUB RD, C-100, Eugene, OR, 97401 |
| Phone | 5413431877 |
| Fax | 5413433831 |
| Enumeration date | 2006-10-03 |
| Last updated in NPPES | 2009-12-30 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry | Primary | D8180 | OR |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: William Breen, DDS NPI: 1164517405 Taxonomy: 1223G0001X (General Practice Dentistry) Address: 895 COUNTRY CLUB RD, C-100, Eugene, OR, 97401
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1063527448 | David Sarett | Individual | General Practice Dentistry | Eugene, OR |
| 1679612410 | Patrick Landau | Individual | Chiropractor | Eugene, OR |
| 1407094360 | Holly Ross | Individual | Acupuncturist | Eugene, OR |
| 1932412194 | Linda Vanmierlo | Individual | General Practice Dentistry | Eugene, OR |
| 1659638260 | Anne Vermilye | Individual | Mechanotherapist | Eugene, OR |
| 1003259623 | Marnie Hackbarth | Individual | Specialist | Eugene, OR |
| 1245665074 | Patrick D. Landau, D.C.,P.C. | Organization | Clinic/Center | Eugene, OR |
| 1487430252 | Rachel Uri | Individual | Mental Health Counselor | Eugene, OR |
Verify this record
Cross-check NPI 1164517405 against the authoritative CMS record: view Dr. William Breen 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
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Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2009-12-30.