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

Willow ABA Services

Organization Behavior Analyst · NPI 1205466612

Willow ABA Services is a Behavior Analyst in Littleton, Colorado. Registered with an NPI since 2020.

In the registry since
2020

Practice location Address checks out

8000 S Lincoln St Ste 10
Littleton, CO 80122-2725
Phone: (720) 316-7614
Fax: (720) 316-7614
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Behavior Analyst (primary) Taxonomy 103K00000X

Record details

NPI number1205466612
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Tanner Sierks Sierks — Owner · (720) 319-7614
NPI enumeratedJanuary 24, 2020
Last updated in NPPESSeptember 26, 2025
Certification dateSeptember 26, 2025
Mailing address8000 S Lincoln St Ste 10, Littleton, CO 80122-2725

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