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

Sydney Diann Seyfert, NP

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1821394974

Sydney Diann Seyfert, NP is a Psychiatric/Mental Health Nurse Practitioner in Missoula, Montana. Practices as a sole proprietor. Licensed in Montana and Washington.

Licensed in
MT, WA
In the registry since
2011
Specialties on file
2
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Practice location Address checks out

821 S Orange St
Missoula, MT 59801-3833
Phone: (406) 540-3556
Fax: (406) 926-1049
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence NUR-RN-LIC-46667 (MT)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence AP60202570 (WA)

Record details

NPI number1821394974
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorYes
NPI enumeratedFebruary 8, 2011
Last updated in NPPESApril 22, 2020
Certification dateApril 22, 2020

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