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Dr. Dyanna Martinez Villesca

Owner | Licensed Psychologist (LP)
School Psychologist (LSP)
Diplomate, American Board of School Neuropsychology (ABSNP)
Bilingual (Spanish)

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Licenses and Certifications

Doctor of Philosophy (Ph.D.) in 2009 from the University of Houston- APA Accredited (School Psychology)
Master's Degree (M.A.) in 2003 from Texas State University-NASP Accredited (School Psychology)
Bachelor's of Science (B.S) in 1999 from the University of Arizona (Psychology)

Dr. Villesca is a Licensed Psychologist with the Texas State Board of Examiners of Psychologists TX License #34550. For information on how to verify a license, please go to www.tsbep.texas.gov. For information on how to file a complaint, please go to the following page: https://www.tsbep.texas.gov/how-to-file-a-complaint-enforcement.

About Me

​I am a Licensed Psychologist (and also a child psychologist) currently practicing in Katy, Texas. I earned my doctorate from the University of Houston, an evidenced-based program approved by the American Psychological Association. I have been practicing for over 23 years combined in both school districts and in private practice. I specialize in conducting psychological evaluations and psychoeducational evaluations for children, adolescents, and adults. I assess many areas including AD/HD, autism (ADOS-2 trained), oppositional defiant disorder, mood disorders (including bipolar), depression, and anxiety (GAD, OCD, phobias). I conduct psychological evaluations for clients from toddlers (18 months for developmental delays) to adults in need of accommodations for college or a differential diagnosis for suspected disorders that were never diagnosed in childhood. My specialties also include assessment of personality disorders. I also provide Parent Management Training for emotional dysregulation and/or defiance that often accompanies ADHD and ODD. I have advanced training in testing for learning disabilities including dyslexia, dysgraphia, and dyscalculia (reading, writing, and math disorders). My specialization also includes expertise in neuropsychological testing which explores issues related to memory, attention, visual-spatial processing, language, and executive functioning. I am also bilingual (English/Spanish) and the owner of Katy Psychological Services, PLLC.

Areas of Expertise 

Comprehensive Assessments – Specializing in Autism, ADHD, and Learning Disabilities (Dyslexia/Dysgraphia), bipolar/mood, SAT)/ACT Accommodations, college accommodations, psychological evaluations (bipolar I/II, cyclothymia, schizophrenia, personality disorders, anxiety disorders, trauma, and disorders categorized in the DSM-V-TR). Experience with special needs, twice exceptional, and neurodiverse populations.

Proficient in pediatric neuropsychological evaluations with an emphasis on how it impacts learning and behavior in the school setting.

Therapy for All Ages – not currently accepting therapy clients

Evidence-Based Treatment – Utilizing CBT, DBT, ACT, and Motivational Interviewing

Bilingual (English/Spanish)

Dr. Dyanna Martinez Villesca

Owner | Licensed Psychologist (LP)
School Psychologist (LSP)
Diplomate, American Board of School Neuropsychology (ABSNP)
Bilingual (Spanish)

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