Willow Tree Therapy Center Pllc

Willow Tree Therapy Center Pllc is a healthcare organization registered as Clinical Psychologist in Naperville, IL, holding Type 2 (organization) NPI 1104282821 since 2016. The authorized official on file is Amy Bilka, Clinical Psychologist.

✓ Active NPI ✓ Valid NPI checksum

NPI	1104282821
Entity type	Organization (Type 2)
Legal business name	Willow Tree Therapy Center Pllc
Practice address	1250 N MILL ST, SUITE 102A, Naperville, IL, 60563
Phone	6304480701
Enumeration date	2016-01-11
Last updated in NPPES	2021-11-13

Authorized official

Name	Amy Bilka
Title	Clinical Psychologist
Phone	6304480701

Taxonomy & classification

Taxonomy code	Specialty	Primary	License	State
103TC0700X	Clinical Psychologist	Primary	071008661	IL

Copy-ready billing details

Provider: Willow Tree Therapy Center Pllc
NPI: 1104282821
Taxonomy: 103TC0700X (Clinical Psychologist)
Address: 1250 N MILL ST, SUITE 102A, Naperville, IL, 60563

Providers at this address

NPI	Name	Type	Specialty	Location
1801849161	Lisa Pellegrini	Individual	Neurology Physician	Naperville, IL
1790732329	Gema	Organization	Prosthetic/Orthotic Supplier	Naperville, IL
1275562779	Barry Rabin	Individual	Psychiatry Physician	Naperville, IL
1538179361	Kenneth Kwiatkowski	Individual	Pediatrics Physician	Naperville, IL
1558559880	Kirsten Tillman	Individual	Clinical Social Worker	Naperville, IL
1750557732	Nancie Spencer	Individual	General Practice Dentistry	Naperville, IL
1053648865	Kenneth Collen	Individual	General Practice Dentistry	Naperville, IL
1538521638	Melissa Woolever	Individual	Professional Counselor	Naperville, IL

Verify this record

Cross-check NPI 1104282821 against the authoritative CMS record: view Willow Tree Therapy Center Pllc on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2021-11-13. Verify at npiregistry.cms.hhs.gov.

Where is Willow Tree Therapy Center Pllc located?

The practice location on file with NPPES is in Naperville, IL.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2021-11-13.