Psychologist | Clinical Psychology

Dr. Donald Ferguson Tweedie Iii

44750 60th St W, Lancaster, California, 93536-7619

About Dr. Donald Ferguson Tweedie Iii

Dr. Donald Ferguson Tweedie Iii is a psychologist based in Lancaster, California who is specialized in Clinical Psychology. Active license number of Dr. Donald Ferguson Tweedie Iii is PSY8090 for Clinical Psychology in California. His current practice location is 44750 60th St W, Lancaster. Patients can contact him at 916-691-0346 or can fax him at 916-691-0534. Dr. Donald Ferguson Tweedie Iii NPI number (Unique professional ID assigned by NPPES) is 1952744401.

Dr. Donald Ferguson Tweedie Iii 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. Donald Ferguson Tweedie Iii'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. Donald Ferguson Tweedie Iii
Specialization Clinical Psychology
Gender Male
Practice Address: 44750 60th St W,
Lancaster, CA - 93536-7619
Fax 916-691-0534

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 Number1952744401
NPI Enumeration Date: 15 Apr, 2013
NPI Last Update On: 15 Apr, 2013

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. Donald Ferguson Tweedie Iii are as mentioned below.

License NumberSpecializationStateStatus
PSY8090Clinical Psychology CaliforniaPrimary

Mailing Address

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

Dr. Donald Ferguson Tweedie Iii
Po Box 391744,
Anza, CA - 92539-1744
Phone: 760-297-1032

Book an Appointment with Dr. Donald Ferguson Tweedie Iii

To schedule an appointment, contact Dr. Donald Ferguson Tweedie Iii at 44750 60th St W, Lancaster, California or call the phone number listed below.

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Frequently Asked Questions

Below are some commonly asked questions about Dr. Donald Ferguson Tweedie Iii:

Dr. Donald Ferguson Tweedie Iii 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. Donald Ferguson Tweedie Iii 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. Donald Ferguson Tweedie Iii practices at 44750 60th St W, Lancaster, California, 93536-7619.

To schedule an appointment with Dr. Donald Ferguson Tweedie Iii, please contact the office at 916-691-0346.

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