Our Therapists


Perry Guthrie, Ph.D.

License number: PSY-7347.
Clinical Psychologist & Qualified Substance Abuse Professional.

Ph.D.: University of Oklahoma, 1978.

Children’s Medical Center, Tulsa, Okla. 1977-78.
In private practice since 1982.

Clinical Orientation:

Population served:
Child, Adolescents, Adults, Individual, Couples, and Family Psychotherapy Qualifies Substance Abuse Professional (SApEvaluations).


Short-term, goal-directed treatment for depression, anxiety, and panic disorder; Behavioral problems in children & adolescents; Marriage & family therapy; Alcoholism and chemical dependency, including dual disorders; Employee Assistance Program Specialist; Critical Incident Stress Debriefing, Jeffrey Mitchell model; Short-term crisis therapy

Link to Forms for Dr. Perry Guthrie


Gloria Sanchez-Perez, MS, MFT

License No. MFC 46522
Licensed Marriage and Family Therapist

M.S. in Psychology with an emphasis in Marriage and Family Therapy from California State Polytechnic University, Pomona in 2000

Foothill Family Services, West Covina, CA 2002-2006
Le Roy Haynes Center, La Verne, CA 2000-2002
West End Family Counseling, Ontario, CA 1999-2000

Clinical Orientation:
Cognitive Behavioral Therapy and Family Systems

Population Served:
Children, Adolescents, Adults, Individuals, Couples, Families and Spanish Speakers


Faith-Based psychotherapy, Child Therapy, Family Therapy,
Couples Therapy, and Therapy in Spanish; Anxiety Disorders, Mood Disorders, Disorders diagnosed in Childhood Adolescence; Relationship Problems (at home, school, work, and with peers), & Parenting Classes

Link to Forms for Gloria Sanchez-Perez


Karen P. Williams, Ph.D.

License No. PSY-12198
Licensed Psychologist

Ph.D.: Florida State University, 1979

Clinical Orientation:

Population Served:
Adults, Children, Adolescents and their families; Individual, Family, and Marital (Couples) Therapy; Services Provided in English and Spanish


Depression, Anxiety (Mild to Moderate), Mood Disorders, PTSD, Trauma, Victimization, Behavioral difficulties in childhood, Gender-Identity, Marital difficulties, Issues related to ethnic/cultural identity and/or faith based

Therapist is available only in the Rancho Cucamonga office

Link to Forms for Karen Williams