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If you want to lift yourself up, lift up someone else.

With staying true to our main goal of improving accessibility for individuals to receive much needed high-quality, mental health services, Renewed Mental Health Group offers multiple options for payment to help you receive mental health care services from our team.

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Meet Professionals

Leadership & Clinical Team

Our dynamic leadership and exceptional clinical team combine expertise, compassion, and innovation to provide exceptional care and drive positive patient outcomes.
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Dr. Irwin

Psychiatrist

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Dr. Ravi

Psychiatrist

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Dr. Montgomery

Psychiatrist

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Karen Rightler

Psychiatric-Mental Health Nurse Practitioner

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Brittany Cadiz

Psychiatric-Mental Health Nurse Practitioner

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Katelyn Magsino

Doctorate-Prepared Psychiatric-Mental Health Nurse Practitioner

Sima Aman NP
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Sima Aman

Psychiatric-Mental Health Nurse Practitioner

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Clint Nacar

Psychiatric-Mental Health Nurse Practitioner

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Medard Sison

Psychiatric-Mental Health Nurse Practitioner

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Michelle D. Rosario

Psychiatric-Mental Health Nurse Practitioner

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Anthony Pham

Psychiatric-Mental Health Nurse Practitioner

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Miguel Castellanos

Psychiatric-Mental Health Nurse Practitioner

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Paul Choi

Psychiatric-Mental Health Nurse Practitioner

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Jennifer Hare

Associate Mental Health Therapist

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Janae Stark, AMFT

Janae Miley Stark

Associate Mental Health Therapist

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Who we are?

Empowering Mental Well-being
We are a compassionate community of mental health professionals dedicated to supporting and empowering individuals on their journey towards improved mental well-being and emotional resilience.
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“If you, or someone you know, is in crisis or needs immediate assistance, please call 911 immediately. To talk to someone now, please call the National Suicide Prevention Lifeline at 800-273-8255.”

Our custom approach uses combined and complemented therapies in an integrative mind/body/spirit holistic model and evidence-based medical practices.
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DR. Irwin

M.D. , Ph.D – Psychiatrist

Dr. Scott Irwin, M.D., Ph.D., is Board Certified Psychiatrist. Dr. Irwin is an integral part of our Management Team as a Psychiatrist and Supervising Psychiatrist for our Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group.

His career mostly focuses on improving outcomes for those with cancer or other progressive, potentially life-limiting illnesses, and their families, through leading-edge clinical services, ongoing research, as well as program development, improvement, and implementation.

He is widely published, has been recognized at many levels for his research, teaching, consulting, and clinical endeavors, and has received research funding from the NCI, NIMH, the National Palliative Care Research Center, the Archstone Foundation, and industry.

Dr. Irwin earned his Bachelor of Science from the University of California, Los Angeles, and both his MD and PhD (neuroscience) at the University of Illinois, Urbana-Champaign. He successfully completed his psychiatry residency at UC San Diego as chief resident of Outpatient Psychiatric Services, as well as a two-year elective in hospice and palliative care at San Diego Hospice and The Institute for Palliative Medicine. He is a diplomate of the American Board of Psychiatry and Neurology, with subspecialty certification in psychosomatic medicine.

DR. Ravi

M.D. – Psychiatrist

Dr. Dave Ravi, M.D., is a Board Certified Psychiatrist with additional qualifications in geriatric psychiatry. Dr. Ravi is an integral part of our Management Team as a Psychiatrist and Supervising Psychiatrist for our Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group.

Dr. Ravi graduated from Virginia Commonwealth University (B.S., Magna Cum Laude), VCU School of Medicine (M.D.), Dartmouth Hitchcock Medical Center (Residency in Psychiatry), and John. A. Burns School of Medicine (Fellowship in Geriatric Psychiatry). He currently is a clinical assistant professor of psychiatry at John A. Burns School of Medicine in Honolulu, HI and serves as a psychiatrist with Renewed Mental Health Group.

Dr. Ravi is a dedicated community psychiatrist with extensive experience in public, correctional, inpatient and outpatient settings, and an experienced tele-psychiatrist. He consults on topics in general psychiatry, including quality improvement, treatment planning, and crisis management, and in correctional psychiatry, including recovery-oriented treatment for individuals with serious mental illness and dual diagnosis. His current and future interests focus on understanding the various approaches in managing the suffering and disturbance of complex psychiatric disorders, particularly in the use, misuse, overuse, and misrepresentation of psychotropic medications.

DR. Montgomery

M.D. – Psychiatrist

Dr. Torri Montgomery, M.D., is a board-certified psychiatrist with the American Board of Psychiatry and Neurology, with a subspecialty board certification in forensic psychiatry. Dr. Montgomery is an integral part of our Management Team as a Psychiatrist and Supervising Psychiatrist for our Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group.

Dr. Montgomery earned her Bachelor of Science (Magna Cum Laude) from Arizona State University and her Doctor of Medicine (M.D.) from The University of Arizona, College of Medicine. She completed her psychiatry residency at Los Angeles County Harbor-UCLA Medical Center. During her psychiatry residency, Dr. Montgomery completed a year-long certification in Electro-Convulsive Therapy (ECT), earned a certificate from the Drug Enforcement Agency (DEA) to prescribe medication for the treatment of substance use disorders, and worked in a Medication Assisted Treatment (MAT) clinic for substance use disorders. Additionally, she was appointed Chief Resident and received an Excellence in Teaching award.

After psychiatry residency, she completed her Forensic Psychiatry Fellowship at the University of Southern California, Keck School of Medicine. After completing her fellowship, Dr. Montgomery has worked in public psychiatry for the Los Angeles County Department of Health Services. She teaches, consults, and treats individuals with depressive disorders, anxiety disorders, trauma-related disorders, and serious mental illness (SMI), such as schizophrenia spectrum and bipolar disorders. Her experience includes outpatient, inpatient, emergency, consult liaison, addiction, dual-diagnosis, and forensic psychiatry. She is an expert evaluator on the Superior Court of California Panel of Expert Psychiatrists and Psychologists. Dr. Montgomery is an attending physician for the Harbor-UCLA Department of Psychiatry and serves as a psychiatrist with Renewed Mental Health Group.

Karen Rightler

PMHNP – BC

Karen Rightler, MFT, PMHNP-BC is a board certified Psychiatric Mental Health Nurse Practitioner with an additional master’s degree in Marriage and Family Therapy. Karen began her nursing career in 2005, working in inpatient acute care settings, home-based care management, and hospital case management. In her early nursing career, Karen discovered her passion for behavioral health, leading her to expand her education and training as a therapist and psychiatry provider. Karen is a New York native and obtained her Psychiatric Mental Health Nurse Practitioner degree from D’Youville College in Buffalo, NY., and her Master’s in Psychology/Marriage and Family Therapy from Chapman University in California. Karen currently works in an outpatient therapy setting, providing behavioral health treatment to children, adolescents, and adults.

As a Psychiatric Mental Health Nurse Practitioner, Karen’s down-to- earth and warm approach integrates medicine and mental health to treat the whole person. In therapy, Karen specializes in Transactional Analysis, which is a theory of personality promoting self-awareness, communication, growth and change. Using simple diagrams and tools, Karen partners with her clients to improve their self-image, enhance personal and professional relationships, and to live the lives they want and deserve. In psychiatry, her areas of focus include: Anxiety, Depression, Acute Stress, Bipolar Disorder, Attention Deficit Hyperactivity Disorder (ADHD), and Post-Traumatic Stress Disorder (PTSD). Karen treats children ages 6+, adolescents, and adults, offering both in-person services and telehealth at Renewed Mental Health Group. Karen is one of our experienced Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group and is supervised by Dr. Ravi.

Brittany Cadiz

PMHNP – BC

Brittany Cadiz is a Board Certified Psychiatric-Mental Health Nurse Practitioner. Brittany received her Master of Science in Nursing degree from California State University of Long Beach. Brittany has multiple years of Psychiatric-Mental Health experience working with inpatient and outpatient mental health patients. In addition to working as a Psychiatric-Mental Health Nurse Practitioner at Renewed Mental Health Group, she works with Severely Mentally Ill Patients in crisis at a Large Inpatient Psychiatry Unit at a well-known hospital.

Brittany has experience and knowledge working together alongside individuals with a variety of psychiatric and mental health conditions throughout the life span. Brittany’s areas of focus include depression, anxiety, acute stress, panic disorder, post-traumatic stress disorder (PTSD), bipolar disorder, and mood disorders.

Drawing from her 5+ years of professional mental health experience, Brittany uses a team-based approach and collaborates with each patient to develop the appropriate treatment plan that addresses each individuals’ needs, concerns, and situation.

Brittany treats Children ages 6 years old and above, Adolescents, Adults and Older Adult Patients. Brittany is one of our experienced Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group and is supervised by Dr. Ravi. Brittany offers both in-person services and telehealth at Renewed Mental Health Group.

Katelyn Magsino

DNP

Katelyn (Kate) Magsino, DNP is a Doctorate-Prepared Nurse Practitioner that specialized in Psychiatric-Mental Health. Kate received her Doctor of Nursing Practice Degree from the University of Arizona and received Top Honors. Kate has been a professional working in her field for several years, bringing a wealth of experience in her role. Having experiencing experience working in both inpatient and outpatient psychiatry and intensive care units, Kate has a strong foundation in the assessment, diagnosis, and treatment of mental health conditions and medical conditions. Kate is one of our experienced Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group and is supervised by Dr. Montgomery.

Kate has a passion for helping individuals and families struggling with mental health challenges and has a holistic approach to care, considering the physical, emotional, and social factors that impact mental well-being. Drawing on her background and interests in education, Kate places a strong emphasis on patient education, collaboration, and shared decision-making with her patients. Kate utilizes a trauma-informed, patient-centered approach in treating her patients and enjoys spending time getting to know each patient and their goals and expectations for treatment. Kate believes in holistic care for mental health care, including psychotherapy, nutrition, lifestyle, and medication management. Kate’s areas of focus include depression, anxiety, adjustment and stress disorders, attention-deficit hyperactivity disorder (ADHD), and post-traumatic stress disorder (PTSD). Kate treats children, adolescents, and adults of all ages, offering both in-person services and telehealth at Renewed Mental Health Group.

Sima Aman

PMHNP – BC

Sima Aman is a Board Certified Psychiatric-Mental Health Nurse Practitioner (PMHNP-BC). Sima received her Master of Science in Nursing degree from Charles R. Drew University of Medicine and Science. Sima has vast experience and knowledge working with individuals of all ages that have moderate to severe psychiatric and mental health conditions. Sima’s areas of focus include attention deficit hyperactivity disorder (ADHD), depression, anxiety, acute stress, panic disorder, post-traumatic stress disorder (PTSD), bipolar disorder, and mood disorders.

Sima’s combined treatment approach is tailored to help meet your specific mental health needs. She strives to provide objective, all-inclusive healthcare and welcome people of all races, genders, and sexual orientations. Sima’s goal is to create an open and safe environment. Sima emphasizes utilizing psychotherapeutic techniques and psychotropic medications to allow for postive results.

Sima advocates and works side by side with her patients to participate in their care and helps them to make the best decision to better themselves. Sima treats individuals of all ages, offering both in-person services and telehealth at Renewed Mental Health Group. Sima is one of our experienced Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group and is supervised by Dr. Montgomery.

Clint Nacar

PMHNP – BC

Clint Nacar, PMHNP-BC is a Board Certified Psychiatric-Mental Health Nurse Practitioner. Mr. Nacar graduated from Charles R. Drew University of Medicine and Science. Currently Mr. Nacar works in an inpatient psychiatry unit at a leading academic medical center in Los Angeles and at Renewed Mental Health Group.

Mr. Nacar brings over 7+ years of experience with the mental health population. He works to help patients take control of their mental health through patient education, psychotherapy and medication management. Mr. Nacar’s areas of focus include: Depression, Anxiety, Adjustment Disorder, Bipolar disorder, Attention Deficit Hyperactivity Disorder (ADHD), and Post-Traumatic Stress Disorder (PTSD). Mr. Nacar treats children ages 6+, adolescents, and adults, offering both in-person services and telehealth at Renewed Mental Health Group.

With the collaboration of each patient, Mr. Nacar strives to develop individualized plans of care addressing each patient’s unique situation and concerns. He also encourages each patient to take charge of their mental health through a holistic approach while also employing the latest evidence based practices in treatment.

Clint is one of our experienced Psychiatric-Mental Health Nurse Practitioners and Clinical Supervisor here at Renewed Mental Health Group and is supervised by Dr. Irwin.

Medard Sison

DNP, PMHNP – BC

Medard Sison, DNP is a Board Certified Psychiatric-Mental Health Nurse Practitioner. Medard has a wealth of knowledge and experience as a Psychiatric Mental-Health Nurse Practitioner working with inpatient and outpatient mental health patients. Medard is a California native and obtained his Doctor of Nursing Practice Degree from Touro University Nevada. He currently works as a professor for a large university educating the future of psychiatric-mental health, manages multiple units at a crisis stabilization center and is part of the leadership team at Renewed Mental Health Group.

Drawing from his 8+ years of professional mental health experience, Medard works to empower patients to understand their mental health conditions and what avenues of treatment are available to them. His areas of focus include attention deficit hyperactivity disorder (ADHD), depression, anxiety, acute stress, panic disorder, post-traumatic stress disorder (PTSD), and adult-geriatric mental health.

Through a patient-centered, team-based approach, Medard utilizes an array of psychotherapeutic techniques as well as psychotropic medications to allow for optimized results. He actively engages his patients to participate in medical decision-making and helps them make informed choices regarding their mental health needs. As the field of psychiatric medicine is constantly developing, Medard continues to educate himself about cutting-edge therapeutic and treatment modalities to provide the best care possible.

Medard is one of our experienced Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group and is supervised by Dr. Irwin.

Michelle D. Rosario

PMHNP – BC

Michelle Del Rosario is a Board Certified Psychiatric-Mental Health Nurse Practitioner (PMHNP-BC). Michelle received her Master of Science in Nursing degree from California State University of Long Beach. Michelle has a wealth of experience and knowledge working together alongside individuals with a variety of psychiatric and mental health conditions throughout the life span. Michelle’s areas of focus include attention deficit hyperactivity disorder (ADHD), depression, anxiety, acute stress, panic disorder, post-traumatic stress disorder (PTSD), bipolar disorder, and mood disorders.

Michelle believes in a patient-centered, team-based approach by utilizing psychotherapeutic techniques and psychotropic medications to allow for optimized results. Michelle actively engages with her patients to participate in their care and helps them to make informed choices in regard to their mental health needs. Michelle treats children ages 12+, adolescents, and adults, offering both in-person services and telehealth, but is no longer providing direct patient care, but is supervising only at Renewed Mental Health Group.

Anthony Pham

PMHNP – BC

Anthony Pham is a Board-Certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) who specializes in treating depression, anxiety, ADHD, PTSD, OCD, and other mental health disorders. Anthony is one of our experienced Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group and is supervised by Dr. Irwin.

Anthony uses the latest evidence-based practices to treat his patients in a holistic, compassionate, and non-judgmental manner. His treatment philosophy focuses on a collaborative approach between provider and patient. Decisions are made together that are best tailored to fit each patient’s unique needs. Anthony strives to achieve optimal physical and mental health for his patients through a combination of medication management and supportive psychotherapy. He is also a strong believer in working collaboratively with therapists to provide comprehensive care that tackles issues from all facets. He works diligently to spread awareness of mental health issues and to reduce the stigma associated with mental health disorders.

Miguel Castellanos Jr

PMHNP – BC

Miguel Castellanos is a Board Certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC). Miguel received his Master of Science in Nursing from Charles R. Drew University of Medicine and Science. Miguel began working as a nurse in a cardiac stroke unit at White Memorial. In addition, to working at Renewed he has worked at a severely acute well-known psychiatric inpatient hospital. Miguel specializes in treating depression, anxiety, ADHD, PTSD, OCD, as well as other mental health disorders.

Miguel focuses on advocating for his patients. He integrates a holistic approach—an approach that meets individuals at difficult points in their lives and guides them toward mental well-being.

Miguel is one of our experienced Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group and is supervised by Dr. Ravi.

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Paul Choi

PMHNP – BC , FNP-C

Paul Choi is a Board Certified Psychiatric Mental Health Nurse Practitioner and also holds a Board Certification for Family Practice. With over a decade of experience as a nurse practitioner and registered nurse, Paul brings a holistic approach to patients of all ages, socioeconomic backgrounds, ethnicities, and sexual identities. He firmly believes that quality mental health needs to be easily accessible. Paul emphasizes the importance of incorporating the recovery model into his day-to-day practice. He provides compassionate care that is evidence-based and personalized to each client’s needs.

Paul speaks fluent Korean and enjoys playing with his child in his free time.

Paul is one of our experienced Psychiatric-Mental Health Nurse Practitioners here at Renewed Mental Health Group and is supervised by Dr. Irwin.

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Jennifer Hare

Associate Therapist

Jennifer Hare an Associate Mental Health Therapist at Renewed Mental Health Group. Jennifer is a registered Associate Clinical Social Worker, who encompasses a deep passion for serving others. Jennifer provides therapy using evidence bases practices such as, CBT, DBT, Psychodynamic, Solution Focused, Strengths Based, and Individualized therapy. Jennifer is dedicated to ensuring that each client she serves is provided with the guidance and direction that is tailored to fit each individual’s specific needs. Jennifer prides herself in monitoring her client’s progress and growth, and determining the proper course of action to take, to aid in creating self-empowerment leading towards change that would allow for a higher quality of life. Jennifer Hare is supervised by Elizabeth Henderson, LCSW #LCSW75238.

Janae Miley Stark

Associate Therapist

Janae Miley Stark is an Associate Marriage and Family Therapist/Associate Professional Clinical Counselor who completed her degree in Clinical Psychology from Azusa Pacific University. Janae has over 2 years experience working with students of varying ages throughout Orange County through individual and group counseling and enjoys walking alongside them through their varying issues. Janae has taught emotional skills classes to students as well as has led grief groups. Janae believes that for people to be well it is important for them to understand their motivations. To facilitate that, Janae strives to build a safe environment for clients to explore their stories and to help them to understand the hurts of their past so they can begin their journey to wellness. Jane Miley Stark is supervised by Elizabeth Henderson, LCSW #LCSW75238.