Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William L Van Der Reis
Specialist in San Clemente, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1710911078
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Registry record
Entity type Individual (Type 1)
Name Dr. William L Van Der Reis
Sex Male
Practice address 653 Camino De Los Mares Ste 109, San Clemente, CA, 92673
Phone (949) 661-2423
Fax (949) 661-9205
Enumeration date Jul 10, 2006
Last updated in NPPES Apr 22, 2014
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
What is the NPI number for William Van Der Reis?
The National Provider Identifier (NPI) for William Van Der Reis is 1710911078, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Van Der Reis practice?
The practice location on file with NPPES is in San Clemente, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-22.