John Vaz, MD
Chief Medical Officer
Dr. John Vaz graduated from medical school with honors in 2006. He completed his residency in Internal Medicine from the University of Connecticut and a fellowship in Infectious Disease from the University of Maryland. Having more than 12 years of diverse experiences, especially in Internal Medicine and Infectious Disease, his current practice interests are HIV care, Viral Hepatitis management, PrEP & nPEP, LGBT care including transgender care, and chronic medical illnesses. He is passionate about addressing disparities in health in populations that are served in community health centers.
Ivy Lou Hibbitt, APRN
Mrs. Ivy Lou Hibbitt, APRN, is a Nurse Practitioner. She graduated in 2015, having over 3 years of diverse experience, especially in Nurse Practitioner.
Jason Laird, MD
A graduate of the University of South Carolina School of Medicine Dr. Laird completed general surgery and internal medicine residency programs at Palmetto Health Richland Memorial Hospital. He has been certified for Outpatient HIV treatment from the American Academy of HIV Medicine since 2010. Dr. Laird was Board Certified in Internal Medicine in 2009. He has been serving our patients since 2015.
Erik Russell, MD
Dr. Russell graduated from Eastern Virginia Medical School in 1991 and has been in practice for 27 years. He completed a residency at Franklin Square Hospital Center.
Gabrielle O’Sullivan, MD
A graduate of the University of Washington in Seattle with a Doctor of Medicine Degree, Dr. O’Sullivan went on to Residency at the University of California, San Francisco affiliated Sutter Family Practice Residency, Santa Rosa, CA, in 2003. Dr . O’Sullivan was recertified by the American Board of Family Medicine, 11/2013. She has been serving our patients since 2016
Jessica Bullock, APRN
Nurse Practitioner Specialist
Ms. Jessica Bullock, NP, is a Nurse Practitioner specialist in Wailuku, Hawaii. She graduated in 2014, having over 4 years of diverse experience, especially in Nurse Practitioner.
Aaron Altura, MD
A graduate of UC Davis School of Medicine, Dr. Altura completed his residency in Obstetrics and Gynecology at Louisiana State University in 1995. He has been serving our patients since 1996.
Duffy Casey, MD
A graduate of Eastern Virginia Medical School, Dr. Casey completed his residency in Obstetrics and Gynecology at the University of Hawaii in 2013. Board Certified in Obstetrics and Gynecology since 2013, he has been serving our patients since 2013.
Jaimie Johnson, MD, FACOG
A graduate of the University of Florida College of Medicine in Gainesville, Dr. Johnson completed her residency in Obstetrics & Gynecology at the University of Hawaii in 2014. She became board-certified in 2016. She has been serving our patients since 2014.
Alison Rivera, MD
Alison Rivera was born and raised in rural southern Illinois and went to college at the University of Illinois at Urbana Champaign, medical school at Southern Illinois University and completed her pediatrics residency at Louisiana State University in New Orleans.
Casandra Simonson, MD
A graduate of University of Kansas School of Medicine, Kansas City, Dr. Simonson attended the Residency program at Louisiana State University Children’s Hospital, New Orleans. Dr. Simonson received her Board certification for Pediatrics in 2014. She has been serving our patients since 2014.
Cathy Moonshine, Ph.D., MAC, CADC III
Integrated Health Director
She has over 20 years of experience in public and private mental health and substance abuse treatment settings across all levels of care. Dr. Moonshine provides licensure supervision and collegial consultation to mental health, addictions and dual diagnosis clinicians. She also works with systems of care and individual clinicians to implement and sustain evidenced based practices.
Daniel Nead, PHD
Dr. Daniel Nead, PHD, is a Clinical Psychologist. He graduated in 2013, having over 5 years of diverse experience, especially in Health Psychologist.
Sarah R. Feenstra, DO
Sarah R. Feenstra, DO is a practicing Psychiatrist (Therapist) in Wailuku, HI. Dr. Feenstra graduated from Lake Erie College of Osteopathic Medicine Erie in 2011 and has been in practice for 7 years. She completed a residency at University of Wisconsin Hospitals & Clinics. Dr. Feenstra is board certified in Psychiatry.
Alisha Yoshitsugu, PsyD
A graduate of Hawaii School of Professional Psychology at Argosy University, Honolulu, Hawaii, Dr. Yoshitsugu became a clinical psychologist in 2015. She has been serving our patients since 2015.
Helen Barrow, TTS
A Tobacco Treatment Counselor Certified from the University of Arizona and the Mayo Clinic, Ms. Barrow was named Outstanding Service Provider in Tobacco Control by the Coalition for Tobacco Free Hawaii in 2013. Currently, she is working on her Master’s of Social Work, a Candidate for graduation summer, 2016.
Renee Sattler, Nutritionist
Renee Sattler graduated from University of Houston in 2014, and finished her dietetic internship at Vanderbilt University in 2015. After serving Pacific Islanders in American Samoa for 2 years, she decided to stay in the islands, and began serving our Maui Ohana in 2018.
Alexander Pijpaert, DDS
Emilie Sumida, DDS
A graduate of SUNY at Stony Brook School of Dental Medicine in Stony Brook, New York, Dr. Sumida completed her Advanced Education in General Dentistry Residency at Schofield Barracks, Tripler Army Medical Center, Honolulu, HI, and Pediatric Dentistry at University of Maryland Medical Center in Baltimore, MD. She will be completing her board certification in September 2016. Dr. Sumida has been serving our patients since 2015.
Dr Lawrence Shin, DDS