Registry data as of Aug 27, 2026

Willow Aba Services

Willow Aba Services holds 7 active organization NPIs in the federal registry, with practice locations in 7 cities in 6 states. All list behavior analyst as their primary taxonomy; each location can bill under its own NPI.

CMS NPPES registry, file of Aug 9, 2026 · legal names grouped after punctuation and "LLC" are removed · method · Verify with CMS →

Which NPI is yours?

Search the organization with your city to find the NPI for the location you visit or bill.

Find a location's NPI

Phoenix, AZ has the most NPIs, 1

  1. Phoenix, AZ1
  2. Littleton, CO1
  3. Lenexa, KS1
  4. Wilmington, NC1
  5. Oklahoma City, OK1
  6. Harker Heights, TX1
  7. Southlake, TX1

Source: CMS NPPES monthly file of Aug 9, 2026, organization NPIs by practice city.

Most NPIs were issued in 2020 and 2022

Willow Aba Services NPIs by year issued2020: 5, 2021: 0, 2022: 2024620202021202252
Willow Aba Services NPIs by year issued2020: 5, 2021: 0, 2022: 2024620202021202252
Willow Aba Services NPIs by year issued2020: 5, 2021: 0, 2022: 2024620202021202252

Source: CMS NPPES, enumeration dates.

5 NPIs were issued in 2020 alone, more than in any other year; none in 1 of the years between.

Phoenix, AZ locations

The city with the most Willow Aba Services NPIs. The full list of all 7 follows.

NPILocationPrimary taxonomyIssued
16499145733409 NORTH 7TH AVE PMB 707, Phoenix, AZBehavior AnalystApr 26, 2022
All 7 locations, by state and city
NPILocationPrimary taxonomyIssued
16499145733409 NORTH 7TH AVE PMB 707, Phoenix, AZBehavior AnalystApr 26, 2022
12054666128000 S LINCOLN ST STE 10, Littleton, COBehavior AnalystJan 24, 2020
188122866615520 COLLEGE BLVD, Lenexa, KSBehavior AnalystMar 2, 2020
19520460393015 MARKET ST, Wilmington, NCBehavior AnalystMay 3, 2022
1508486705401 E MEMORIAL RD STE 400, Oklahoma City, OKBehavior AnalystApr 17, 2020
1679193528904 MOUNTAIN LION CIR STE 400, Harker Heights, TXBehavior AnalystApr 21, 2020
16397043722815 EXCHANGE BLVD STE 100, Southlake, TXBehavior AnalystMar 3, 2020

Related names

Checking an organization

  1. Match the NPI to the exact location you will visit or bill; each location can have its own.
  2. Confirm the business entity with the secretary of state.
  3. Check the HHS-OIG exclusion list for the organization and its owners.
  4. Verify each clinician you will see on their own record and with the state license search.

Common questions

Why does Willow Aba Services have 7 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. Willow Aba Services's NPIs list practice locations in 7 cities.

Is an organization NPI a license?

No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.

Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.