Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Derek Blair Thomas
Behavior Analyst in Frederick, MD · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821667387
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Registry record
Entity type Individual (Type 1)
Name Derek Blair Thomas
Sex Male
Practice address 324 S Jefferson St, Frederick, MD, 21701
Phone (301) 882-7932
Enumeration date Jun 21, 2021
Last updated in NPPES Jun 21, 2021
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 Derek Thomas practice?
The practice location on file with NPPES is in Frederick, MD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Derek Thomas?
The National Provider Identifier (NPI) for Derek Thomas is 1821667387, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-21.