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DR. AARON GRUSONIK
NPI 1326908526
Psychologist - Clinical in Fort Harrison, MT

Active since November 12, 2025
3687 VETERANS DR, FORT HARRISON, MT 59636(408) 482-0323 Get Directions Write a Review

NPPES record last updated: November 12, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Aaron Grusonik NPPES

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

DR. AARON GRUSONIK (NPI 1326908526) is an individual clinical provider in Fort Harrison, Montana, licensed in Montana (PSY-PSY-LIC-5876) and active in the NPI registry since November 2025.

NPPES Registry Identity

NPI1326908526
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameDR. AARON GRUSONIK
Location Address3687 VETERANS DRFort Harrison, MT 59636-9700
Mailing Address1240 E 9th St # 1907Cleveland, OH 44199-9904 · (408) 482-0323
Phone(408) 482-0323
Sole ProprietorNo
Enumeration DateNovember 12, 2025
NPPES CertifiedNovember 12, 2025
✔ NPI 1326908526 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in MT · PSY-PSY-LIC-5876
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
3687 VETERANS DR, Fort Harrison, MT 59636
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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.

KIMBERLY VAN WYK PHARMD
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
3687 VETERANS DR
FORT HARRISON, MT 59636
Lewis And Clark County (406) 447-7307
AMBER LYNN CHENOWETH P.T.
Physical Therapist
3687 VETERANS DR
FORT HARRISON, MT 59636
Lewis And Clark County (406) 447-7708
MOLLIE FRANCES MULHOLLAND PSYD
Psychologist (Clinical)
3687 VETERANS DR
FORT HARRISON, MT 59636
Lewis And Clark County (406) 442-6410
MCKENZIE ANN SCHNEIDER
Pharmacist
3687 VETERANS DR
FORT HARRISON, MT 59636
Lewis And Clark County (406) 447-7575
MRS. MICHELE COLLEEN KELLER LAC, MA
Counselor (Mental Health)
3687 VETERANS DR
FORT HARRISON, MT 59636
Lewis And Clark County (406) 447-6000
JOHN F SIMS M.D.
Internal Medicine
3687 VETERANS DR
FORT HARRISON, MT 59636
Lewis And Clark County (406) 442-6410
MARY MIKESON PHARMD
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
3687 VETERANS DR
FORT HARRISON, MT 59636
Lewis And Clark County (406) 447-7081
MARY G BLEVINS RRT
Respiratory Therapist, Registered
3687 VETERANS DR
FORT HARRISON, MT 59636
Lewis And Clark County (140) 644-7793

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 Aaron Grusonik's NPI number?

The NPI number for Aaron Grusonik is 1326908526. It was assigned to this individual provider in the NPPES registry on November 12, 2025.

Where is Aaron Grusonik located?

Aaron Grusonik practices at 3687 Veterans Dr, Fort Harrison, MT 59636. The listed phone number is (408) 482-0323.

What is Aaron Grusonik's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for Aaron Grusonik was last updated on November 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.