Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Derek Hook, MSW, LCSW

Individual provider Mental Health Counselor · NPI 1700282571

Derek Hook, MSW, LCSW is a Clinical Social Worker in Great Falls, Montana. Graduated from Sanford School of Medicine of University of South Dakota in 2014, 12 years ago. Practices with Anchorage Community Mental Health Services Inc, a 40-clinician group and accepts Medicare assignment. Licensed in Montana and South Dakota.

Years since qualifying
12
Trained at
Sanford School of Medicine of University of South Dakota
Licensed in
MT, SD
In the registry since
2014
Specialties on file
2
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

915 1st Ave S
Great Falls, MT 59401-3705
Phone: (406) 791-9613
Fax: (406) 761-5440
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 38241 (MT)
Mental Health Counselor Taxonomy 101YM0800X · Licence SD3348 (SD)

Record details

NPI number1700282571
Entity typeIndividual (Type 1)
GenderMale
Credentials MSW , LCSW
Sole proprietorNo
NPI enumeratedNovember 6, 2014
Last updated in NPPESJune 25, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolSANFORD SCHOOL OF MEDICINE OF UNIVERSITY OF SOUTH DAKOTA
Graduated 2014 (12 years in practice)
Group practice Anchorage Community Mental Health Services Inc — 40 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients24
Services billed 174 a service is one billed item, such as a visit, a test or a procedure
Average patient age65

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Anchorage Community Mental Health Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 40 clinicians in the practice; 12 are shown here.

Other providers in Great Falls