Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William Frederick Prewett, DDS
Dentist in Tehachapi, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1144403197
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Registry record
Entity type Individual (Type 1)
Name Dr. William Frederick Prewett
Credential DDS
Sex Male
Practice address 24900 End Hwy 202, Tehachapi Prison, Tehachapi, CA, 93561
Phone (661) 822-4402
Enumeration date Dec 13, 2007
Last updated in NPPES Dec 13, 2007
Taxonomy & licenses
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees.
About the DDS credential
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 William Prewett?
William Prewett is registered in NPPES with the primary taxonomy of Dentist. 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 2007-12-13.