Providers
Dr. Ivan C.A. Walks, MD
Psychiatrist & Neuropsychiatrist
Dr. Ivan C.A. Walks is a highly respected psychiatrist and neuropsychiatrist in Silver Spring, MD with over 35 years of experience in mental health care. With more than three decades of dedicated service, Dr. Walks has helped thousands of patients overcome mental health challenges and reclaim their lives.
As the founder of Integrated Health Resources, Dr. Walks brings exceptional expertise in diagnosing and treating complex psychiatric conditions. His patient-centered approach ensures that each individual receives an accurate diagnosis and a personalized treatment plan tailored to their unique needs, circumstances, and goals.
Sokna Diop, PMHNP-C, DNP
Board-Certified Psychiatric Mental Health Nurse Practitioner
Dr. Sokna Diop, PMHNP-C, DNP, is a board-certified psychiatric nurse practitioner in Silver Spring, MD at Integrated Health Resources. With a unique combination of advanced psychiatric training and over 15 years of comprehensive patient care experience, Dr. Diop brings exceptional expertise and genuine compassion to mental health treatment.
As a Doctor of Nursing Practice specializing in psychiatric care, Dr. Diop is dedicated to helping patients navigate mental health challenges through collaborative, personalized treatment approaches that honor each individual’s unique journey toward wellness.
Kim Jones-Fearing, MD
Board-Certified Psychiatrist
Dr. Kim Jones-Fearing is a highly experienced psychiatrist in Silver Spring, MD at Integrated Health Resources, bringing over 32 years of medical expertise to mental health care. With more than three decades of dedicated service, Dr. Jones-Fearing has helped countless individuals overcome mental health challenges and reclaim the rich, fulfilling lives they deserve.
As a distinguished graduate of Howard University College of Medicine in Washington, DC, Dr. Jones-Fearing combines exceptional clinical training with deep compassion and understanding. Her extensive experience and patient-centered approach have made her a trusted and respected figure in the field of psychiatry.
Dante Alexander, PMHNP-BC
Psychiatric Mental Health Nurse Practitioner
Dr. Dante Alexander is a compassionate psychiatric mental health nurse practitioner providing evidence-based mental health care through Integrated Health Resources. With experience supporting children, adolescents, and adults across a wide range of psychiatric conditions, Dante helps patients better understand their mental health, find relief from symptoms, and build healthier coping skills.
Dante brings a practical, down-to-earth approach to care, combining careful psychiatric evaluations with thoughtful medication management and supportive guidance. His goal is to make treatment understandable, collaborative, and realistic for everyday life, so patients feel supported at every step of their journey.
Dr. Maria Lourdes Castineira, MD
Psychiatrist & Addiction Psychiatrist
Dr. Maria Lourdes Castineira is a board-certified psychiatrist providing evidence-based psychiatric care through Integrated Health Resources. With extensive clinical experience, she supports adults with a wide range of mental health conditions, including mood disorders, anxiety disorders, psychotic disorders, and substance use disorders. Her approach is thorough, structured, and tailored to each patient’s needs and treatment goals.
Dr. Castineira is board certified in Adult Psychiatry and Addiction Psychiatry by the American Board of Psychiatry and Neurology (ABPN) and completed fellowship training in Addiction Psychiatry at the University of Maryland School of Medicine. She provides comprehensive psychiatric evaluations and individualized medication management, taking time to ensure patients feel informed, supported, and actively involved in their care.
Dr. Sheryl Johnson, PhD
Executive Function & Life Transition Coach
Dr. Sheryl Johnson holds a PhD in Developmental Psychology and brings more than 20 years of experience supporting adults through life-stage transitions, executive functioning challenges, and professional growth.
She works with clinically stable individuals and couples seeking greater clarity, organization, communication, and sustainable progress. Her coaching approach is structured, strengths-based, and future-focused. Coaching services are non-clinical and distinct from psychotherapy or psychiatric care.