Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Ryan Charles Olson, ND
Naturopath in Sebastopol, CA · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1144704545
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Registry record
Entity type Individual (Type 1)
Name Dr. Ryan Charles Olson
Credential ND
Sex Male
Practice address 396 Ragle Rd, Sebastopol, CA, 95472
Phone (707) 322-1688
Enumeration date Sep 20, 2018
Last updated in NPPES Sep 20, 2018
Taxonomy & licenses
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Ryan Olson?
Ryan Olson is registered in NPPES with the primary taxonomy of Naturopath. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-20.