About Me

Dr. Treegoob is a psychologist specializing in individual therapy and maintains a private practice in Glendale, AZ and Tempe, AZ.

With over 44 years experience as a therapist, and as a graduate of George Washington University, Indiana State University, and Devereux Foundation specializing in clinical psychology, he is currently serving as private practitioner working with a broad spectrum of clients. Among his areas of expertise are OCD, Generalized Anxiety Disorder, Panic Attacks, ADHD, Anger Management, Stress Management, Asperger's/ASD (higher functioning), Bipolar Disorder, BFRB's. He is LGBTQ+ friendly. I do involve the family with adolescent therapy but do not specialize in family therapy or couples/marital therapy. 

I have done a great deal of continuous training with the top people in the field of anxiety, OCD, solution-focused therapy, and CBT. I have also have training in working with skinpicking, trichotillomania, hoarding, and Bipolar Disorder.

Dr. Treegoob is an interactive, solution-focused therapist. His therapeutic approach is to provide support and practical feedback to help clients effectively address personal life challenges. He integrates complementary methodologies and techniques to offer a highly personalized approach tailored to each client. With compassion and understanding, he works with each individual to help them build on their strengths and attain the personal growth they are committed to accomplishing.

Education: George Washington University, Indiana State University (Ph.D.), and a postdoctoral internship at Devereux Foundation.
I am certified in CBT, Anger Management, Telehealth and Anxiety and am working toward certification in Solution-Focused Therapy and ADHD. I have done extensive training in ACT, SFT, OCD, and ADHD.

Professional Activities and Memberships: American Psychological Association, Arizona Psychological Association, IOCDF, National Register of Health Service Providers.

Contact Me



Glendale (T,W,Th) and Tempe (M, F)

Mark Treegoob PHD


9 a.m. to 6:15 p.m. Tempe


9 a.m. to 6:15 p.m. Glendale


9 a.m. to 6:15 p.m. Glendaale


9 a.m. to 6:15 p.m. Glendale


9 a.m.to 6:15 p.m. Tempe