Professional Therapist

Gillian Thornhill, L.P.C.

422 N Northwest Hwy Ste 335, Park Ridge, Illinois, 60068-3261

About Gillian Thornhill

Gillian Thornhill is a therapist based in Park Ridge, Illinois who is specialized in Professional Counselor. Active license number of Gillian Thornhill is 178003972 for Professional Counselor in Illinois. Her current practice location is 422 N Northwest Hwy Ste 335, Park Ridge. Patients can reach her at 847-894-6442 or can fax her at 630-954-6066. Gillian Thornhill is L.P.C. in Professional Counselor and her NPI number (Unique professional ID assigned by NPPES) is 1407975949.

Gillian Thornhill is a licensed mental health practitioner trained to help individuals, couples, and groups address emotional, psychological, and behavioral challenges. She uses talk therapy and evidence-based counseling methods to support clients in managing mental health conditions, improving relationships, and developing coping strategies for life’s difficulties.

Practice Information

Gillian Thornhill speciality, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Gillian Thornhill
Specialization Professional Counselor
Credentials L.P.C.
Gender Female
Practice Address: 422 N Northwest Hwy Ste 335,
Park Ridge, IL - 60068-3261
Fax 630-954-6066

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1407975949
NPI Enumeration Date: 28 Mar, 2007
NPI Last Update On: 12 May, 2026

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Gillian Thornhill are as mentioned below.

License NumberSpecializationStateStatus
178003972Professional Counselor IllinoisPrimary

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Gillian Thornhill
422 N Northwest Hwy Ste B4,
Park Ridge, IL - 60068-3272
Phone: 847-894-6442
Fax: 630-954-6066

Book an Appointment with Gillian Thornhill

To schedule an appointment, contact Gillian Thornhill at 422 N Northwest Hwy Ste 335, Park Ridge, Illinois or call on below stated phone number.

Call to Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Gillian Thornhill:

Gillian Thornhill is a therapist specializing in Professional Counselor. She is a licensed mental health practitioner trained to help individuals, couples, and groups address emotional, psychological, and behavioral challenges. She uses talk therapy and evidence-based counseling methods to support clients in managing mental health conditions, improving relationships, and developing coping strategies for life’s difficulties.

Yes, Gillian Thornhill is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.

Gillian Thornhill practices at 422 N Northwest Hwy Ste 335, Park Ridge, Illinois, 60068-3261.

To schedule an appointment with Gillian Thornhill, please contact the office at 847-894-6442.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.