Dr. Gregory G. Olsen, DDS
Dr. Gregory G. Olsen is a Oral and Maxillofacial Surgery (Dentist) provider (Dentist) practicing in Folsom, CA, registered in the NPPES registry with NPI 1205156775 since 2010. The credential DDS stands for Doctor of Dental Surgery.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1205156775 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Gregory G. Olsen |
| Credential | DDS |
| Sex | Male |
| Practice address | Folsom, CA, 95630 |
| Phone | 9169836637 |
| Fax | 9169836610 |
| Enumeration date | 2010-06-08 |
| Last updated in NPPES | 2013-11-26 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223S0112X | Oral and Maxillofacial Surgery (Dentist) | Secondary | 019127270 | IL |
| 1223S0112X | Oral and Maxillofacial Surgery (Dentist) | Primary | 59360 | 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: Gregory Olsen, DDS NPI: 1205156775 Taxonomy: 1223S0112X (Oral and Maxillofacial Surgery (Dentist)) Address: Folsom, CA, 95630
Verify this record
Cross-check NPI 1205156775 against the authoritative CMS record: view Dr. Gregory G. Olsen 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 2026-07-11. Provider record last updated 2013-11-26.