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

Tiffany M Siefken, LCSW/LISW

Individual provider Clinical Social Worker · NPI 1366068082

Tiffany M Siefken, LCSW/LISW is a Clinical Social Worker in Fort Collins, Colorado. Licensed in Colorado, Iowa and Illinois. Registered with an NPI since 2020.

Licensed in
CO, IA, IL
In the registry since
2020
Specialties on file
3

Practice location Address checks out

2244 Miles House Ave Apt 108
Fort Collins, CO 80525-4191
Phone: (319) 316-2262
Fax: (888) 375-1723
Show map & directions

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 09930293 (CO)
Clinical Social Worker Taxonomy 1041C0700X · Licence 149.028517 (IL)
Clinical Social Worker Taxonomy 1041C0700X · Licence 100864 (IA)

Record details

NPI number1366068082
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW/LISW
Sole proprietorNo
NPI enumeratedJune 18, 2020
Last updated in NPPESAugust 27, 2025
Certification dateAugust 27, 2025

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