Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Spencer M Gilliam
Behavior Analyst in Saint Louis, MO · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477126159
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Registry record
Entity type Individual (Type 1)
Name Spencer M Gilliam
Sex Male
Practice address 96 Grasso Plz, Saint Louis, MO, 63123
Phone (636) 398-2515
Enumeration date Jul 21, 2021
Last updated in NPPES Nov 24, 2025
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 2025050192 (MO) Primary
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 Spencer Gilliam practice?
The practice location on file with NPPES is in Saint Louis, MO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Spencer Gilliam?
The National Provider Identifier (NPI) for Spencer Gilliam is 1477126159, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-24.