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Frost Mental Health
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Board-certified team

Meet our psychiatric providers

Board-certified psychiatric mental health nurse practitioners offering compassionate, evidence-based care across California and Florida.

Portrait of Melissa Frost, PMHNP-BC, GNP Accepting new patients

Founder & Clinical Director

Melissa Frost, PMHNP-BC, GNP

Board-Certified Psychiatric Mental Health Nurse Practitioner & Geriatric Nurse Practitioner

  • MSN, UCLA
  • BSN, Loma Linda University
  • 25+ years in practice
  • Licensed in CA & FL

Care built on deep empathy, active collaboration and careful diagnosis.

Melissa Frost is a board-certified psychiatric mental health nurse practitioner and geriatric nurse practitioner with more than 25 years of clinical experience. She earned her nursing degree at Loma Linda University and her Master of Science in Nursing at UCLA.

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She has worked in residential addiction medicine, homes supporting people with developmental and intellectual disabilities, geriatric care and outpatient telepsychiatry, and she speaks and consults for psychiatric education programs.

Melissa is especially passionate about helping adults with ADHD and treatment-resistant mood conditions, using neurotransmitter and hormone testing alongside careful diagnosis to find clarity and balance.

Areas of focus
  • Adult ADHD
  • Neurotransmitter & hormone testing
  • Treatment-resistant mood conditions
Request a visit with Melissa
Portrait of Lisa Johnson, PMHNP-BC, FNP-BC Accepting new patients

Psychiatric & Family Nurse Practitioner

Lisa Johnson, PMHNP-BC, FNP-BC

Dual Board-Certified Psychiatric & Family Nurse Practitioner

  • Dual board certified
  • Post-master’s, Western University of Health Sciences
  • MSN, Loma Linda University
  • BSN, Ryerson University

Looking at emotional health through a physical and biochemical lens.

Lisa Johnson is dual board-certified as a Psychiatric Mental Health Nurse Practitioner and a Family Nurse Practitioner. She earned her BSN at Ryerson University in Toronto, her master’s degree at Loma Linda University, and her post-master’s psychiatric certificate at Western University of Health Sciences.

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Her dual training lets her look at psychiatric symptoms alongside physical health, including sleep disorders, hormonal changes and chronic metabolic stress.

Lisa is known for her warm, down-to-earth style, clear patient education and focus on sustainable, long-term wellness.

Areas of focus
  • Hormonal shifts
  • Sleep problems
  • Mind–body health
Request a visit with Lisa

A collaborative team

Our providers consult with one another on complex cases, so you benefit from the experience of the whole team, not just one clinician.

Ready to feel more like yourself?

Whether you’re struggling with depression, anxiety or ADHD, we’ll start with a thorough consultation and build a plan with you.

Request a consultation Call (626) 600-8543
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