Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Deanna L. Armstrong, MD

Individual provider Psychiatry Physician · NPI 1003900184

Dr. Deanna L. Armstrong, MD is a Psychiatry Physician in Helena, Montana. Practices as a sole proprietor. Licensed in Montana.

Licensed in
MT
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2755 Colonial Dr
Helena, MT 59601-4926
Phone: (406) 444-7500
Fax: (406) 884-2085
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence MED-PHYS-LIC-101070 (MT)

Record details

NPI number1003900184
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 3, 2006
Last updated in NPPESMay 6, 2024
Certification dateMay 6, 2024

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