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Therapist in Costa Mesa, California Ms. Lillie Avetisyan-Harvey, Therapist

Gender Identity: Female (She/Her)

Ages Served: 22-75+

Appointments: In-office and Online

Manages Medications: No, provides therapy only

Accepts Insurance: Yes - View accepted plans

Ms. Lillie Avetisyan-Harvey, Therapist

Ms. Lillie Avetisyan-Harvey, LCSW

Specializes In:

First responder stress
Grief & loss
Military & veteran
See all specialties >

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.

Types of Care & Ages Served

Areas of Focus

Individual Therapy

Get help addressing challenges and improve well-being with a clinician's guidance.

  • First responder stress
  • Grief & loss
  • Military & veteran
  • Alcohol use
  • Anger issues
  • Anxiety
  • Bipolar Disorder
  • Career & relationships (mid-life)
  • Career & work issues
  • Chronic pain-related issues
  • Depression/feeling down
  • Detachment/disconnection
  • Dissociative disorders
  • Domestic violence & abuse
  • Drug/substance use
  • Emotional abuse
  • Empty nesters
  • Gambling
  • Gender identity
  • General relationship issues
  • Hoarding
  • Intense mood changes
  • LGBTQ+
  • Marital stress or divorce
  • Other addictive behaviors
  • Panic attacks
  • Parenthood
  • Pornography/sexual behaviors
  • Premarital counseling
  • Self-esteem
  • Sexual trauma
  • Social injustice
  • Stress management
  • Trauma & PTSD
  • Video game/internet

Languages

  • Armenian
  • English

Education

  • University of Southern California

FAQs

Please call us at 657-756-3481 to schedule an appointment with Ms. Lillie Avetisyan-Harvey.

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See what our patients are saying about Lillie Avetisyan-Harvey

I’ve been on a journey of healing for many years from childhood trauma. Years of psychotherapy helped me to function. Working with Lillie is giving me the opportunity to live and know the one person I once betrayed for love and acceptance which is me. Lillie is a true instrument of healing and I am so grateful to have her on this path.
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N K.

N K.

Nov 27, 2025
Google Google
The best therapist I could have asked for, she has help me so much, I cannot say thank you enough. Very professional and humane, I have lots of things to work on still but I already feel in a completely new mental place.
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Alejandra G.

Alejandra G.

Aug 05, 2025
Google Google
Very happy with my experience. I look forward to my sessions!
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Minga T.

Minga T.

Aug 19, 2025
Google Google
Lillie is wonderful. Thank you Lillie.
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Kathy P.

Kathy P.

May 13, 2026
Google Google
Excellent experience
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Edith Johana R.

Edith Johana R.

Apr 15, 2026
Google Google
Excellent experience
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JT V.

JT V.

Aug 03, 2025
Google Google
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Patient Review Disclaimer

The testimonials and reviews shared on our platforms reflect the personal experiences and opinions of individuals voluntarily shared on third-party sites (e.g., Google). These reviews are voluntarily provided and are not compensated, solicited, or endorsed by LifeStance Health.

Important Notes:

  • Reviews do not represent the views of LifeStance Health, Inc., its clinicians, or affiliates
  • Individual results may vary – testimonials are not guarantees of similar outcomes
  • We do not independently verify the clinical accuracy or authenticity of statements
  • Clinician qualifications, expertise, and fit for your specific needs should be assessed through direct consultation

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