Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Clark Allison Spencer, DDS MSD
Dentist in Longview, TX · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1578675237
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Registry record
Entity type Individual (Type 1)
Name Dr. Clark Allison Spencer
Credential DDS MSD
Sex Male
Practice address 2904 North Fourth Street, Suite 107, Longview, TX, 75605
Phone (903) 757-0534
Fax (903) 757-7461
Enumeration date Aug 31, 2006
Last updated in NPPES Jul 8, 2007
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
Where does Clark Spencer practice?
The practice location on file with NPPES is in Longview, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Clark Spencer?
The National Provider Identifier (NPI) for Clark Spencer is 1578675237, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.