Psychologist | Clinical Psychology

Dr. John Donald Williams, PH.D.

1315 W College Ave, Suite 303, State College, Pennsylvania, 16801-2776

About Dr. John Donald Williams

Dr. John Donald Williams is a psychologist based in State College, Pennsylvania who is specialized in Clinical Psychology. Active license number of Dr. John Donald Williams is PS004377L for Clinical Psychology in Pennsylvania. His current practice location is 1315 W College Ave, Suite 303, State College. Patients can contact him at 814-441-5738 or can fax him at 814-861-5163. Dr. John Donald Williams, PH.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1467787093.

Dr. John Donald Williams is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). His main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that he can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

Dr. John Donald Williams's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Dr. John Donald Williams
Specialization Clinical Psychology
Credentials PH.D.
Gender Male
Practice Address: 1315 W College Ave, Suite 303
State College, PA - 16801-2776
Fax 814-861-5163

Professional Identification Codes

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

NPI Number1467787093
NPI Enumeration Date: 15 Oct, 2009
NPI Last Update On: 28 Jun, 2012

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Dr. John Donald Williams are as mentioned below.

License NumberSpecializationStateStatus
PS004377LClinical Psychology PennsylvaniaPrimary

Mailing Address

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

Dr. John Donald Williams
1315 W College Ave, Suite 303
State College, PA - 16801-2776
Phone: 814-441-5738
Fax: 814-861-5163

Book an Appointment with Dr. John Donald Williams

To schedule an appointment, contact Dr. John Donald Williams at 1315 W College Ave, Suite 303, State College, Pennsylvania or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. John Donald Williams:

Dr. John Donald Williams is a psychologist specializing in Clinical Psychology. He is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). His main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that he can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Yes, Dr. John Donald Williams is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Dr. John Donald Williams practices at 1315 W College Ave, Suite 303, State College, Pennsylvania, 16801-2776.

To schedule an appointment with Dr. John Donald Williams, please contact the office at 814-441-5738.

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