Patient care done differently

We are an integrated wellness family focused on improving the physical, mental, and spiritual health of our communities. By using the latest technology we are making great care accessible to everyone.

Patient care done differently

Our Team

Dung Trinh, MD

Healthcare Educator

Dung Trinh, MD is the Chief Medical Officer of Irvine Clinical Research, a Board Member for Alzheimer’s Orange County, a physician with MemorialCare, and is a medical missionary with TongueOut Medical Missions.  He is a keynote speaker, best-selling author, and host of “Health Talks with Dr Trinh” which can be heard weekly on OC Talk Radio.

Hoa Nguyen

Hoa Nguyen, MD

Medical Director

Dr. Hoa Nguyen is a board-certified internist who is passionate in serving sickest and frailest patients. With more than 12 years of experience in taking care of patients in multiple settings including in the ER, hospital, long term acute care, along with home bound geriatric patients, Dr. Nguyen knows how to make health care personal and improves healthcare with meaningful results. He also served as a regional lead physician at Landmark Health, the largest house-call program in the nation, managing complex, chronic patients at home. In addition, with his previous position as a physician advisor and telemedicine provider for the State of California, he has learned how to meet and take care of patients whenever and wherever. He also specializes in treating patients to get off of opioid, alcohol, heroin, and other substance use disorders. He understands that most wellness goals are a process and are not solved with a prescription. He strongly believes in comprehensive principles of biochemical individuality based on genetic and environmental uniqueness, patient centered care as opposed to disease-centered care, health as a function of dynamic balance between internal and external factors, and health is a positive vitality rather than merely the absence of disease.

Hye-Won Grace Shin, PhD

Chief Science Officer, Chief Global Affairs Officer

Dr. Hye-Won (Grace) Shin is the Chief Scientific Officer at RIIID Medical Group. She oversees research projects, develops scientific evidence-based community education programs and establishes domestic and global partnerships.

Dr. Shin is a biomedical engineer with a chemical engineering background and clinical translational research experience. She holds a Ph.D. in Chemical and Biochemical Engineering from UCI. Dr. Shin’s areas of research expertise and interest include: minimally-invasive medical technology for early detection of inflammation and infection, mobile health technology for chronic disease management, biomarkers, biotransport, and multiscale systems integration. Dr. Shin also focuses on developing biomedical and social interventions that can reduce racial and ethnic health disparities, specifically among Asian immigrants with limited English proficiency. She has published 30+ research papers in prestigious peer-reviewed journals; 60+ conference proceedings and has written multiple successful research grants. In addition, she is an inventor on four issued patents. Dr. Shin has been invited to present at national and international science conferences over 60 occasions. In addition, she has been invited to serve as a National Institute of Health extramural grant reviewer and has served as a referee for a number of peer-reviewed journals including the IEEE Sensors Journal, Journal of Breath Research, the Journal of Applied Physiology, European Respiratory Journal, and the American Journal of Respiratory and Critical Care Medicine to provide expert evaluations on the research of fellow scientists.

In parallel, Dr. Shin serves as the Director of Asian American Community Outreach at UCI Institute for Memory Impairments and Neurological Disorders ( ); a Community Advisory Board member for the CARE research project ( by representing Somang Society (

Professional Summary

Research Publications

Professional Services and Leadership Activities

Karl Tokita, MBA

Chief Financial Officer

Karl Tokita has worked in the Orange County medical community for over 20 years.  He was a founding member and current Chief Operations Officer of KSK Medical, a private provider of cancer, advanced imaging, and outpatient surgical services.   He also works with several local charities including as a board member for Team Kids and as an emeritus board member for the Irvine Public Schools Foundation.

Jennifer Truong, BSN, RN

Director of Nursing and International Healthcare

As Director of Nursing and International Healthcare, Jennifer brings a unique combination of experience in bedside patient care, nursing research, health education, medical mission coordination, and operations management.  She is on the Board of Advisors for TongueOut Medical Missions, works with Children’s Hospital of Orange County, and consults for a mobile app development start-up.  Jennifer is driven by the notion of providing quality health resources to our most vulnerable at home and abroad and is excited to put her skills to work with the RiiiD team.

Narges Feizabadi MSN, FNP-C, CVNP-BC

Narges Feizabadi MSN, FNP-C, CVNP-BC

Healthcare Providers

Narges Feizabadi MSN, FNP-C, CVNP-BC is a Nurse Practitioner with twelve years of successful experience in medical practice. She is a Board Certified Family Nurse Practitioner (2013) and has a subspecialty in Cardiovascular Medicine (2017). Narges aspires to continue serving her patients and the community at large while at the same time acquiring as much knowledge in the nursing profession as possible. To this end, she is currently pursuing her doctoral degree and is set to graduate in 2022. Narges speaks fluent Farsi as well as English./p>

Maria Theresa Manalese, DNP

Maria Theresa Manalese, DNP

Healthcare Providers

Maria Theresa Manalese, DNP is an accomplished Nurse Practitioner with over 15 years’ experience in the healthcare industry specializing in Family Medicine. She takes pride of her accomplishments mainly helping underserved community. She is also fond of the beauty industry in which she established a medical spa clinic and wellness center of her own specializing in non-surgical skin rejuvenation therapy.
She wants to engage more with influential decision-makers and thought leaders in the healthcare industry. She is open to challenges and conversation, and an exchange of ideas from her colleagues and top players in healthcare. 

John Park

John Park, PhD Psychology

John Park, PhD Psychology

Dr. Park is a clinical psychologist with a doctorate in Clinical Psychology / Neuropsychology & Health Psychology. In addition, he has completed a postdoctoral fellowship in Anxiety and Mood Disorders. He has a deep passion for helping his patients and is also involved with teaching as an Assistant Professor at Cal Baptist University. Dr. Park’s desire to help people is also evident through his Masters of Divinity (Hospital Chaplaincy).  

R i i i D

Remove inefficiency ineffectiveness inconvenience from the healthcare system around the worlD.”

Our Partners & Affiliations

KSK Imaging center irvine
KSK Imaging center irvine
Nouslogic Telehealth