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Open arms, open heart.

Orange County · Psychiatric Care

Compassionate, culturally-aware psychiatric care from Sandra Castillo, PMHNP. Meeting you where you are — with warmth, trust, and true understanding. Our trusting professionals are here for you.

Sandra Castillo, PMHNP

Meet Sandra

Fourteen years of caring for the mind & heart.

Sandra Castillo is a Psychiatric Mental Health Nurse Practitioner serving Orange County. Her journey began in 2010 as a caregiver in assisted living, and has grown through every rung of psychiatric nursing — CNA, RN, ICU nurse during the pandemic, travel nurse, home health, and nursing instructor.

"I became a nurse to find purpose — to go home each day knowing I helped my community. As a psychiatric nurse practitioner, I get to keep doing that, helping people understand their mental health and meeting them where they are."

Sandra especially loves working across cultures. Growing up she saw how beautiful culture can be — and how it can sometimes delay families from understanding what a loved one is going through. Her practice is built to bridge that gap with warmth and clarity.

Credentialed in California, Alaska, and Idaho — in person in Santa Ana and by telehealth across all three states.

Trusted

Fourteen years across every level of psychiatric care — from bedside to advanced practice.

Passionate

Mental health work chosen with purpose — every visit an opportunity to truly help.

Caring

Culturally-aware, judgment-free care that meets you where you are, on your terms.

Background

Experience & Education

Clinical Experience

  • 2024–PresentPsychiatric Mental Health Nurse Practitioner
  • 2022–PresentPsychiatric Nursing Instructor
  • 2018–2024Psychiatric Registered Nurse
  • 2021–2022Psychiatric Travel Nurse
  • 2021Psychiatric Home Health Nurse
  • 2020–2021ICU Nurse (COVID-19 Pandemic)
  • 2015–2018Psychiatric Certified Nursing Assistant
  • 2010–2015Caregiver / Medication Technician

Education

  • Doctor of Nursing Practice

    Cal State University Fullerton

    Starting August 2026

  • Master of Science in Nursing / PMHNP

    National University, Costa Mesa

    Jan 2023 – Aug 2024

  • Bachelor of Science in Nursing

    Cal State University Fullerton

    Jan 2019 – May 2020

  • Associate of Science in Registered Nursing

    Santa Ana College

    Aug 2016 – Jun 2018

Book your appointment with our qualified professionals.