Welcome to Integrative Psychiatry
At Integrative Psychiatry, we believe mental health care should reflect the full complexity of each individual. Our approach considers both the emotional and biological dimensions of well-being, recognizing that mental health symptoms often stem from a combination of physical, psychological, and environmental factors. We take time to understand each person’s unique history, offering thoughtful, evidence-informed care. In addition to traditional psychiatric treatments, we incorporate integrative tools such as Transcranial Magnetic Stimulation (TMS), and advanced testing—including genetic and neurotransmitter analysis—when appropriate. These tools help us better understand how your body responds to medications and where imbalances may be affecting your mental health. With practice locations in Laguna Niguel and Canoga Park, we are proud to serve communities across both Orange County and Los Angeles County. Our goal is to provide care that is not only clinically effective, but also respectful, attentive, and grounded in a genuine commitment to your healing.
Meet Our Providers
Vitaliy Shaulov MD
Vitaliy Shaulov is a Medical Doctor specializing in Psychiatry. Dr. Shaulov has a pre-medical degree in Sport Physiology and Education. He then went on to complete medical school at The Tartu University, Estonia (1979-1984). After obtaining his medical degree, Dr. Shaulov completed both Psychiatry and Neurology residency programs affiliated with the New York Medical College (1993-1997), University of Alabama (1997) and Brookdale University (1998-1999). Dr. Shaulov works with patients of all ages treating a broad scope of mental health conditions with vast experience in treating adjustment disorders, acute stress disorder, Attention Deficit Hyperactivity Disorder (ADHD), adults and children, anxiety, depression, bipolar-affective disorder, obsessive compulsive disorder, panic disorder, phobias, posttraumatic stress disorder (PTSD), sexual disfunctions, and substance abuse.Dr. Shaulov has been board certified under the American Board of Psychiatry and Neurology since September 24, 2015. ​
Ronnie Cummings MD
Ronnie Cummings is a Medical Doctor specializing in Psychiatry. After receiving a Bachelor's Degree from California State University, Sacramento in 1999, Dr. Cummings graduated from medical school at the University of California, San Diego, School of Medicine (1999-2004). Dr. Cummings provides comprehensive care to adult patients, treating a wide range of mental health conditions such as anxiety, depression, attention deficit/hyperactivity disorder (ADHD), bipolar-affective disorder, obsessive compulsive disorder, panic disorders, acute stress disorder, and adjustment disorders. He has earned the esteemed title of Diplomate of the American Board of Psychiatry and Neurology, holding the distinction since October 2010 to the present day. Dr. Cummings is known for his patient-centered approach, emphasizing empathy, evidence-based care, and collaborative treatment planning.
Greg Grigoryan DNP
Greg Grigoryan is a DNP specializing in Psychiatry. He received his BSN from California State University Fresno in 2012 and his postgraduate certificate in PMHNP from California State University Fresno in 2017. He then continued his education and received his doctorate from Missouri State University in 2019.His work experience includes working at Kaweah Delta Mental Health in Visalia, Ca. for 2 years, at Community Behavioral Health Center in Fresno, Ca. for 2 years, and as a PMHNP in Fresno, Ca. for 3 years before relocating to Laguna Niguel, CA to join our practice.Greg Grigoryan works with patients ages five years and older who live with a broad scope of mental health conditions, from anxiety and depression to attention deficit hyperactivity disorder (ADHD) and substance abuse. He has satisfied the continuation training requirement as a buprenorphine prescriber. Greg Grigoryan is certified with the American Nurses Credentialing Center Adult Psychiatric – Mental Health Nurse Practitioner and has experience in medicine, he is AANP board certified in the state of California as a FNP.
Jennifer Theis NP
Jennifer Theis is a Nurse Practitioner specializing in Psychiatry. She received her BSN from Pacific Union College in Angwin, Ca.in 1996 and her MSN and her post graduate certificate in PMHNP from California State University of Long Beach, Ca.in 2013.Her work experience includes working as a staff nurse at LAC/USC Medical Center for 14 years and a PMHNP at Providence Community Service and Orange County Health & Psychology Inc. She currently has been working full-time as a PMHNP at Access Center with LA County’s Department of Mental Health in addition to working part-time at our practice here in Laguna Niguel since 2014. Jennifer works with patients ages seventeen and older who live with a broad scope of mental health conditions, from anxiety and depression to attention deficit hyperactivity disorder (ADHD) and substance abuse. Jennifer is certified with the American Nurses Credentialing Center Adult Psychiatric –Mental Health Nurse Practitioner, Basic Cardiac Life Support from American Heart Association, Basic Adult Critical Care Program from LAC-USC Medical Center, and Surgical Specialties from LAC-USC Medical Center.
Angela Hernandez NP
Angela Hernandez is a Nurse Practitioner specializing in Psychiatry. She received her BSN, MSN, and post graduate certificate in PMHNP from from Azusa Pacific University. Her work experience includes working as a Registered Nurse at Jason Hess Surgery Center in San Diego, CA for 2 years before gaining experience in the mental health field by working as a inpatient psychiatric nurse at the VA Medical Center in Los Angeles, as well as for Patient Aligned Care Team (PACT) in Laguna Hills, CA. Angela works with patients of all ages who deal with a broad scope of mental health conditions, from anxiety and depression to attention deficit hyperactivity disorder (ADHD) and substance abuse. Angela is certified with the American Nurses Credentialing Center Adult Psychiatric –Mental Health Nurse Practitioner and AANP board certified in the state of California as a PMHNP.
Samuel Grigoryan NP
Samuel Grigoryan is a Nurse Practitioner specializing in Psychiatry. He received his BSN, MSN, and post graduate certificate in PMHNP from National University. His work experience includes working as a Registered Nurse at Exodus Recovery, a psychiatric crisis stabilization center. Samuel works with patients of all ages who deal with a broad scope of mental health conditions, from anxiety and depression to attention deficit hyperactivity disorder (ADHD) and substance abuse. Samuel is certified with the American Nurses Credentialing Center Adult Psychiatric –Mental Health Nurse Practitioner and AANP board certified in the state of California as a PMHNP. He takes a compassionate and evidence-based approach to care, focusing on creating personalized treatment plans that support each patient's unique journey toward mental wellness. Samuel is deeply committed to fostering a safe and supportive environment where patients feel heard, respected, and empowered in their recovery.
Vinessa Gaerlan-Finch NP
Vinessa Gaerlan-Finch is a Nurse Practitioner specializing in Psychiatry. She received her BSN from The Family Clinic College, and her MSN and post graduate certificate in PMHNP from Chrales R. Drew University. Vinessa has had extensive experience working in Psychiatric Private Practices, Skilled Nursing Facilities, and Rehabilitation Centers. Vinessa works with adolescent and adult patients who deal with a broad scope of mental health conditions, from anxiety and depression to attention deficit hyperactivity disorder (ADHD) and substance abuse. Vinessa is certified with the American Nurses Credentialing Center Adult Psychiatric –Mental Health Nurse Practitioner and AANP board certified in the state of California as a PMHNP. Vinessa has a dedication to helping patients feel seen and supported throughout their treatment. She is passionate about promoting mental health awareness and strives to empower her patients through education, empathy, and collaborative care.