Demi Kourtesi, Psychologist
Dr. Demi Kourtesi, is a clinical psychologist, who helps individuals in Arizona navigate life’s most complex emotional and psychological challenges with compassion, insight, and evidence-based strategies. Practicing at LifeStance Health, she provides therapy and psychological testing for teens, adults, and seniors, offering individualized care that promotes growth, healing, and resilience. Demi works closely with her clients to identify root causes of emotional distress and behavioral patterns, empowering them to develop practical tools for lasting well-being. Demi specializes in treating OCD and Personality Disorders, using a thoughtful, client-centered approach.
The DSM-5 recognizes 10 distinct personality syndromes: Paranoid (distrust and suspicion of others), Schizoid (detachment from social relationships), Schizotypal (social discomfort and eccentric behavior), Antisocial (disregard for the rights of others), Borderline (instability in relationships and emotions), Histrionic (excessive emotionality and attention-seeking), Narcissistic (a grandiose sense of self-importance), Avoidant (social inhibition and hypersensitivity to criticism), Dependent (an excessive need to be cared for), and Obsessive-Compulsive personality disorder (a preoccupation with orderliness and control). If you’re interested in learning more about these personality syndromes, this short screener can provide some insights, but it is not a substitute for a professional evaluation: https://similarminds.com/personality_disorder_test.html
These conditions often affect every aspect of a person’s life, from daily functioning to relationships and self-esteem. Her clinical expertise includes the use of Psychodynamic Therapy, Exposure and Response/Ritual Prevention (EX/RP), and Cognitive Behavioral Therapy (CBT) to support individuals in overcoming interpersonal challenges, intrusive thoughts and compulsive behaviors, and mood instability. Demi is committed to helping clients understand how neurodevelopmental differences and trauma histories influence their behavior and emotional experiences. She uses targeted interventions and testing tools to assist in diagnosis and treatment planning, ensuring each client receives the support they need to thrive. Demi also has extensive experience with neuropsychological and personality testing which she incorporates into her work to support accurate diagnoses and guide tailored treatment approaches. Outside of her clinical work, Demi is an avid student of psychology, philosophy, and astronomy. She enjoys traveling, skateboarding, snowboarding, reading, cooking/baking, and spending time with others over board games and movies. Her diverse interests reflect her open-minded, curious, and creative spirit—qualities that inform her warm and collaborative therapeutic style.
Types of Care & Ages Served
- Individual Therapy: Ages 18-74
- Psychological & Neuropsychological Testing: Ages 18-74
Areas of Focus
Individual Therapy
Get help addressing challenges and improve well-being with a clinician's guidance.
- Obsessive Compulsive Disorder
- Patterns affecting behavior, emotions and relationships
- Personality disorders
- Anger issues
- Anxiety
- Depression/feeling down
- Detachment/disconnection
- Dissociative disorders
- General relationship issues
- Hair pulling & skin picking
- Hoarding
- Marital stress or divorce
- Panic attacks
- Phobias
- Premarital counseling
- Self-esteem
- Sexual trauma
- Stress management
- Trauma & PTSD
Psychological & Neuropsychological Testing
Psychological testing and evaluations are used to collect insights into someone’s behavior and thoughts.
Insurances Accepted
- Aetna
- Blue Cross Blue Shield (BCBS)
- Carelon (Beacon)
- Centivo
- Claritev (MultiPlan PHCS)
- Devoted Health Plan
- Evernorth (Cigna)
- HealthSmart
- Humana
- Lucet (SCAN Health Plan)
- MediNcrease Health Plans (MHP)
- Medicare
- Northwell Direct
- Optum (UnitedHealthcare)
- Partners Direct Health
- Provider Network of America (PNOA)
- Quest Behavioral Health
- Sana Benefits
- TELUS Health (BHS)
- Tricare West (TriWest)
Languages
- English
- Greek
Education
- University of Nevada Las Vegas
- California State University, Los Angeles
Locations
Frequently Asked
Questions About
Demi Kourtesi
Please call us at 480-716-0545 to schedule an appointment with Demi Kourtesi.
Demi Kourtesi generally accepts new patients but there could be a waitlist.
Please call 480-716-0545 to find out Demi Kourtesi's schedule and availability.
LifeStance Health providers accept most commercial insurance plans that are offered in the states where we offer services, including telehealth. Please see the following list of insurances accepted by Demi Kourtesi:
- Aetna
- Blue Cross Blue Shield (BCBS)
- Carelon (Beacon)
- Centivo
- Claritev (MultiPlan PHCS)
- Devoted Health Plan
- Evernorth (Cigna)
- HealthSmart
- Humana
- Lucet (SCAN Health Plan)
- MediNcrease Health Plans (MHP)
- Medicare
- Northwell Direct
- Optum (UnitedHealthcare)
- Partners Direct Health
- Provider Network of America (PNOA)
- Quest Behavioral Health
- Sana Benefits
- TELUS Health (BHS)
- Tricare West (TriWest)
If you don't see your insurance listed, please contact us at 480-716-0545 to see how we can help.
Demi Kourtesi is a Psychologist and cannot prescribe medication. However, most LifeStance offices have a Psychiatrist or APN on staff who can prescribe medication if needed.
Demi Kourtesi works at:
Yes, Demi Kourtesi does offer online telehealth visits.
Yes, Demi Kourtesi is currently offering in-office visits at the following location:
- English
- Greek