Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mackenzie Ali Stiff, LCSW

Individual provider Social Worker · NPI 1356150064

Mackenzie Ali Stiff, LCSW is a Clinical Social Worker in Missoula, Montana. Qualified in 2021, 5 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
5
Licensed in
MT
In the registry since
2025
Specialties on file
2
What do these letters mean?
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

405 S 1st St W
Missoula, MT 59801-1850
Phone: (406) 541-8472
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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 BBH-LCSW-LIC-78383 (MT)
Social Worker Taxonomy 104100000X (MT)

Record details

NPI number1356150064
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedJanuary 6, 2025
Last updated in NPPESJanuary 6, 2025
Certification dateJanuary 6, 2025

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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