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SPENCER M GILLIAM
NPI 1477126159
Behavior Analyst in Saint Louis, MO

Active since July 21, 2021
96 GRASSO PLZ, SAINT LOUIS, MO 63123(636) 398-2515 Get Directions Write a Review

NPPES record last updated: November 24, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Nov 24, 2025, Jul 21, 2021 (2 updates tracked since 2021).

About Spencer M Gilliam NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SPENCER M GILLIAM (NPI 1477126159) is an individual behavior analyst provider in Saint Louis, Missouri, licensed in Missouri (2025050192) and active in the NPI registry since July 2021.

NPPES Registry Identity

NPI1477126159
Entity TypeIndividualMale
Primary Taxonomy103K00000X
Provider Legal NameSPENCER M GILLIAM
Location Address96 GRASSO PLZSaint Louis, MO 63123-3108
Mailing Address9841 Huntingdon LnSaint Louis, MO 63123-6415 · (614) 323-3109
Phone(636) 398-2515
Sole ProprietorNo
Enumeration DateJuly 21, 2021
Last NPPES UpdateNovember 24, 20252 updates tracked since enumeration
NPPES CertifiedNovember 24, 2025
✔ NPI 1477126159 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyBehavior AnalystBehavioral Health & Social Service Providers
Taxonomy Code103K00000X
License✔ Licensed in MO · 2025050192
Definition
A behavior analyst is qualified by at least a master's degree and Behavior Analyst Certification Board certification and/or a state-issued credential (such as a license) to practice behavior analysis independently. Behavior analysts provide the required supervision to assistant behavior analysts and behavior technicians. A behavior analyst delivers services consistent with the dimensions of applied behavior analysis. Common services may include, but are not limited to, conducting behavioral assessments, analyzing data, writing and revising behavior-analytic treatment plans, training others to implement components of treatment plans, and overseeing implementation of treatment plans.
Also ListedBehavior TechnicianTaxonomy 106S00000X
96 GRASSO PLZ, Saint Louis, MO 63123
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JEREMY PARROTT RBT
Behavior Technician
96 GRASSO PLZ
AFFTON, MO 63123
St. Louis County (636) 398-2515
YINING ZHANG
Behavior Technician
96 GRASSO PLZ
AFFTON, MO 63123
St. Louis County (636) 398-2515
MALLORY TUCKER
Behavior Technician
96 GRASSO PLZ
SAINT LOUIS, MO 63123
St. Louis County (636) 398-2515
SUMMER E MCGUIRE
Behavior Technician
96 GRASSO PLZ
AFFTON, MO 63123
St. Louis County (636) 398-2515
BRIANNA A PEREZ
Behavior Technician
96 GRASSO PLZ
AFFTON, MO 63123
St. Louis County (636) 398-2515
SANDRA GAY
Behavior Technician
96 GRASSO PLZ
AFFTON, MO 63123
St. Louis County (636) 398-2515
ALEXIS RICHEY
Behavior Technician
96 GRASSO PLZ
AFFTON, MO 63123
St. Louis County (636) 398-2515
AMBER KRAFFT
Behavior Technician
96 GRASSO PLZ
AFFTON, MO 63123
St. Louis County (636) 398-2515

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Spencer Gilliam's NPI number?

The NPI number for Spencer Gilliam is 1477126159. It was assigned to this individual provider in the NPPES registry on July 21, 2021.

Where is Spencer Gilliam located?

Spencer Gilliam practices at 96 Grasso Plz, Saint Louis, MO 63123. The listed phone number is (636) 398-2515.

What is Spencer Gilliam's specialty?

The primary specialty registered for this NPI is Behavior Analyst with taxonomy code 103K00000X.

When was this NPI record last updated?

The NPPES record for Spencer Gilliam was last updated on November 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.