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TESS GELDERLOOS MA, BCBA LBA
NPI 1144626342
Behavior Analyst in Great Falls, MT

Active since November 15, 2014
1601 2ND AVE N STE 700, GREAT FALLS, MT 59401(406) 205-0452(406) 545-2276 Get Directions Write a Review

NPPES record last updated: February 9, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 21, 2022, Mar 17, 2018 (2 updates tracked since 2018).

About Tess Gelderloos Ma, Bcba Lba NPPES

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

TESS GELDERLOOS MA, BCBA LBA (NPI 1144626342) is an individual behavior analyst provider in Great Falls, Montana, licensed in Montana (1-14-16072) and active in the NPI registry since November 2014.

NPPES Registry Identity

NPI1144626342
Entity TypeIndividualFemale
Primary Taxonomy103K00000X
Provider Legal NameTESS GELDERLOOSCredential: MA, BCBA LBA
Location Address1601 2ND AVE N STE 700Great Falls, MT 59401-3288
Mailing Address1240 116th Ave Ne Ste 102Bellevue, WA 98004-3815 · (206) 437-5412
Phone(406) 205-0452
Fax(406) 545-2276
Sole ProprietorNo
Enumeration DateNovember 15, 2014
Last NPPES UpdateFebruary 9, 20262 updates tracked since enumeration
NPPES CertifiedFebruary 9, 2026
✔ NPI 1144626342 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyBehavior AnalystBehavioral Health & Social Service Providers
Taxonomy Code103K00000X
License✔ Licensed in MT · 1-14-16072
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.
1601 2ND AVE N STE 700, Great Falls, MT 59401
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana.Insurance ›

Other Providers at the Same Location NPPES 19

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

KYNDALIN CALDWELL BT
Behavior Technician
1601 2ND AVE N STE 700
GREAT FALLS, MT 59401
Cascade County (406) 205-0452
TORRIE GRANT
Behavior Technician
1601 2ND AVE N STE 700
GREAT FALLS, MT 59401
Cascade County (406) 240-2045
NICOLE MICHELLE MILLER
Behavior Analyst
1601 2ND AVE N STE 700
GREAT FALLS, MT 59401
Cascade County (406) 205-0452
KATELYN MORROW
Behavior Technician
1601 2ND AVE N STE 700
GREAT FALLS, MT 59401
Cascade County (406) 205-0452
JULIE SCHONIGER
Behavior Technician
1601 2ND AVE N STE 700
GREAT FALLS, MT 59401
Cascade County (406) 205-0452
MOLLIE SCHNORR BCBA
Behavior Analyst
1601 2ND AVE N STE 700
GREAT FALLS, MT 59401
Cascade County (406) 205-0452
SHEA MORGAN BREEN BT
Behavior Technician
1601 2ND AVE N STE 700
GREAT FALLS, MT 59401
Cascade County (406) 205-0452
RILEE GERVAIS BT
Behavior Technician
1601 2ND AVE N STE 700
GREAT FALLS, MT 59401
Cascade County (406) 205-0452

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 Tess Gelderloos's NPI number?

The NPI number for Tess Gelderloos is 1144626342. It was assigned to this individual provider in the NPPES registry on November 15, 2014.

Where is Tess Gelderloos located?

Tess Gelderloos practices at 1601 2nd Ave N Ste 700, Great Falls, MT 59401. The listed phone number is (406) 205-0452.

What is Tess Gelderloos's specialty?

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

What insurance does Tess Gelderloos accept?

Health plans from Blue Cross and Blue Shield of Montana list Tess Gelderloos as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Tess Gelderloos was last updated on February 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.