Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. David Karl Oster, ND
Naturopath in Conifer, CO · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1912474743
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Registry record
Entity type Individual (Type 1)
Name Dr. David Karl Oster
Credential ND
Sex Male
Practice address 11547 Green Cir, Conifer, CO, 80433
Phone (720) 987-9887
Fax (888) 296-5365
Enumeration date Oct 30, 2018
Last updated in NPPES Jun 2, 2026
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 David Oster?
David Oster 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 2026-06-02.