Psychologist | Clinical Psychology

Dr. Mark Williams Stevens, PH.D.

13525 Midland Rd, Suite J, Poway, California, 92064-4771

About Dr. Mark Williams Stevens

Dr. Mark Williams Stevens is a psychologist based in Poway, California who is specialized in Clinical Psychology. Active license number of Dr. Mark Williams Stevens is 20859 for Clinical Psychology in California. His current practice location is 13525 Midland Rd, Suite J, Poway. Patients can contact him at 858-207-8322 or can fax him at 858-748-8050. Dr. Mark Williams Stevens, PH.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1336269398.

Dr. Mark Williams Stevens 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. Mark Williams Stevens'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. Mark Williams Stevens
Specialization Clinical Psychology
Credentials PH.D.
Gender Male
Practice Address: 13525 Midland Rd, Suite J
Poway, CA - 92064-4771
Fax 858-748-8050

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 Number1336269398
NPI Enumeration Date: 30 Mar, 2007
NPI Last Update On: 08 Jul, 2007

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. Mark Williams Stevens are as mentioned below.

License NumberSpecializationStateStatus
20859Clinical 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. Mark Williams Stevens
13525 Midland Rd, Suite J
Poway, CA - 92064-4771
Phone: 858-207-8322
Fax: 858-748-8050

Book an Appointment with Dr. Mark Williams Stevens

To schedule an appointment, contact Dr. Mark Williams Stevens at 13525 Midland Rd, Suite J, Poway, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Mark Williams Stevens:

Dr. Mark Williams Stevens 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. Mark Williams Stevens 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. Mark Williams Stevens practices at 13525 Midland Rd, Suite J, Poway, California, 92064-4771.

To schedule an appointment with Dr. Mark Williams Stevens, please contact the office at 858-207-8322.

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