Dr. O'Neill is *NOT* accepting new patients at this time.

Leslie O'Neill, clinical psychologist at Spectrum Psychology & Wellness


  • Anxiety and Depression
  • Coping with Chronic Illness
  • Adjustment Issues
  • Stress Management
  • Sexual Identity/LGBTQ
  • Gender Identity

Leslie O’Neill, Ph.D

Clinical Psychologist

Complete Vitae

eCounseling Profile

Dr. Leslie O’Neill obtained her Bachelor’s Degree, cum laude and with honors in psychology, from the University of Missouri. She obtained her Ph.D. and MS in clinical psychology at the University of Miami in Coral Gables, FL. While there, she received the Kirk R. Danhour Memorial Award for Outstanding Graduate Student in her program. She was trained specifically in clinical health psychology and utilizing biopsychosocial interventions in work with medical populations. Dr. O’Neill has since focused primarily on individual, conjoint and group psychotherapy for adults and adolescents living with chronic illness.

Over the course of her career, Dr. O’Neill has had experience helping people living with HIV, cancer, spinal cord injury, cardiovascular disease, dialysis, and primary care patients and geriatric populations. She has developed special interests and areas of expertise in work with LGBTQA adults, those suffering from anxiety and depressive disorders and couples seeking psychotherapy. Dr. O’Neill’s primary theoretical orientation is cognitive-behavioral, incorporating both motivational interviewing and mindfulness techniques when appropriate.


  • Anxiety and Depression
  • Coping with Chronic Illness
  • Adjustment Issues
  • Stress Management
  • Sexual Identity/LGBTQ
  • Gender Identity

Please note that our office does not prescribe medications; however, we would encourage and appreciate the opportunity to collaborate with your prescribing physician.

Dr. O’Neill sees patients 18 years and older.

Dr. O’Neill sees patients at the MESA office.

Insurance Accepted

Dr. Leslie O’Neill accepts the following insurance:

  • AHCCCS plans: Mercy Care Plan, Arizona Complete Health, Molina Complete Care (formerly Magellan Complete Care)
  • Aetna
  • Aetna-Banner
  • Alignment Healthcare
  • Most BlueCross/BlueShield Plans
  • BCBS Medicare Advantage
  • Cigna/Evernorth
  • HMC HealthWorks (formerly APS Healthcare)
  • Humana
  • Managed Health Network (MHN) / Health Net
    (NOT AHCCCS/Medicaid)
  • Medicare
  • Mercy Care Plan AHCCCS/LTC/Advantage
  • Mercy Maricopa Integrated Care (MMIC)
  • TriWest

We are happy to assist you in filing your insurance claim as a courtesy to you. However, please note that knowledge of your insurance contract and its limitations are not our responsibility.

Services may be covered in full or in part by your health insurance or employee benefit plan. If you would like utilize out-of-network coverage through your insurance provider, we will provide you with an insurance superbill to assist you in filing a claim with your own individual insurance carrier.

For more information about Insurance, Rates and Payment, please click below.

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