Therapist in Costa Mesa, California Lillie Avetisyan Harvey, Therapist
Provider Gender: Female
Ages Served: 18-64
Appointments: In-office and Telehealth
Manages Medications: No, provides therapy only

Lillie Avetisyan Harvey, LCSW
Lillie Avetisyan Harvey, LCSW, provides compassionate and effective mental health care to individuals and families across California. She supports children, adolescents, and adults in navigating life’s challenges through personalized therapy tailored to each individual’s needs. Lillie offers individual therapy, couples therapy, family therapy, and group therapy, creating a safe and collaborative space where clients can explore their emotions, develop coping strategies, and build resilience.
Lillie is particularly passionate about treating PTSD, trauma, substance use disorders, anxiety, and depression. She understands how these challenges can impact daily life and works closely with clients to uncover underlying causes while developing personalized treatment plans. Using evidence-based approaches like Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), and Eye Movement Desensitization and Reprocessing (EMDR), Lillie helps clients build healthy coping skills and regain a sense of control.
In addition to her work with individuals, Lillie has specialized experience supporting first responders, military personnel, and veterans, understanding the unique stressors they face. She also serves children and adolescents, offering age-appropriate therapy to address emotional and behavioral challenges. Lillie is fluent in Armenian and Spanish, ensuring culturally sensitive care for diverse communities.
Outside of her professional life, Lillie is an avid runner, having participated in the Los Angeles and Malibu marathons, numerous half-marathons, 10Ks, and 5Ks. She also loves reading both fiction and nonfiction, often finishing one to two books each month, which broadens her perspective and enriches her work as a therapist.
Insurances Accepted
- Aetna
- Behavioral Health Systems (BHS)
- Blue Shield of California
- Carelon (Beacon)
- Centivo
- Claritev (MultiPlan PHCS)
- Claritev (MultiPlan PHCS)-Medicare
- ComPsych
- Elevance Health (Anthem Blue Cross)
- Elevance Health (Anthem Blue Cross)-Medicare
- Evernorth (Cigna)
- Health Net (MHN)
- Health Net (MHN)-Medicare
- Kaiser Permanente (NorCal)
- Kaiser Permanente (NorCal)-Medicare
- Magellan
- Medicare
- MediNcrease Health Plans (MHP)
- Optum, UnitedHealthcare
- Partners Direct Health
- Provider Network of America (PNOA)
- Sana Benefits
- Tricare West (TriWest)
Interventions
- Cognitive Behavioral Therapy (CBT)
- Dialectical Behavior Therapy (DBT)
- EMDR
- Mindfulness
Populations
- First Responders
- Men
- Military/Veterans
- Women
Education
-
University of Southern California
Professional | 2017
Los Angeles, CA, US
-
California State University Northridge
Professional | 2010
Northridge, CA, US
-
California State University Northridge
Undergraduate | 2004
Northridge, CA, US
Languages
- English
- Armenian
- Spanish
FAQs
Please use our online form to schedule an appointment with Lillie Avetisyan Harvey. You can also call 925-282-1778 to have someone assist you.
Lillie Avetisyan Harvey generally accepts new patients but there could be a waitlist.
Please call 925-282-1778 to find out Lillie Avetisyan Harvey'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 Lillie Avetisyan Harvey:
- Aetna
- Behavioral Health Systems (BHS)
- Blue Shield of California
- Carelon (Beacon)
- Centivo
- Claritev (MultiPlan PHCS)
- Claritev (MultiPlan PHCS)-Medicare
- ComPsych
- Elevance Health (Anthem Blue Cross)
- Elevance Health (Anthem Blue Cross)-Medicare
- Evernorth (Cigna)
- Health Net (MHN)
- Health Net (MHN)-Medicare
- Kaiser Permanente (NorCal)
- Kaiser Permanente (NorCal)-Medicare
- Magellan
- Medicare
- MediNcrease Health Plans (MHP)
- Optum, UnitedHealthcare
- Partners Direct Health
- Provider Network of America (PNOA)
- Sana Benefits
- Tricare West (TriWest)
If you don't see your insurance listed, please contact us at 925-282-1778 to see how we can help.
Lillie Avetisyan Harvey is a Therapist and cannot prescribe medication. However, most LifeStance offices have a Psychiatrist or APN on staff who can prescribe medication if needed.
Lillie Avetisyan Harvey works at:
Yes, Lillie Avetisyan Harvey does offer online telehealth visits.
Yes, Lillie Avetisyan Harvey is currently offering in-office visits at the following location:
- English
- Armenian
- Spanish