OrganizationActive
Willow Aba Services
NPI 1205466612 · Behavior Analyst · Littleton, CO
Willow Aba Services is a Behavior Analyst organization in Littleton, CO (NPI 1205466612).
Provider details
- NPI number
- 1205466612
- Entity type
- Organization
- Primary specialty
- Behavior AnalystBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Tanner Sierks Sierks, Owner(720) 319-7614
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(65/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
8000 S Lincoln St Ste 10
Littleton, CO 80122-2725
Phone: (720) 316-7614
Fax: (720) 316-7614
Street-level locationGet directions
Mailing address
8000 S Lincoln St Ste 10
Littleton, CO 80122-2725
Registry dates
- Enumerated
- 2020-01-24
- Last updated
- 2025-09-26
- Certified
- 2025-09-26
Frequently asked questions
- What is Willow Aba Services's NPI number?
- Willow Aba Services's National Provider Identifier (NPI) is 1205466612, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Willow Aba Services?
- Willow Aba Services is classified in the NPPES registry as Behavior Analyst (Behavioral Health & Social Service Providers).
- Where is Willow Aba Services located?
- Willow Aba Services's practice location on file with NPPES is 8000 S Lincoln St Ste 10, Littleton, CO 80122-2725.
- What is Willow Aba Services's phone number?
- The practice phone number listed in the NPPES registry for Willow Aba Services is (720) 316-7614.
- Who is the authorized official for Willow Aba Services?
- The authorized official listed on Willow Aba Services's NPPES record is Tanner Sierks Sierks, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Willow Aba Services's NPI active?
- Yes — Willow Aba Services's NPI (1205466612) is active in the NPPES registry as of the last update on 2025-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.