About
Dr. Luis Ragunton earned his Bachelor of Science in Biology from the University of San Francisco in 1977. He then completed his Doctorate of Medicine at the University of Hawaii, John A. Burns School of Medicine in 1981. He followed that with an internship and internal medicine residency at the University of Hawaii Integrated Medical Residency Program, finishing in 1984.
Dr. Ragunton holds Diplomate status from both the American Board of Internal Medicine and the National Board of Medical Examiners. He has maintained board certification in internal medicine for more than 35 years. His clinical interests include diabetes, cardiovascular disease, hypertension, thyroid conditions, and preventive medicine. He has practiced in Aiea for over 30 years and affiliates with Pali Momi Medical Center. Since medical school, he has carried a conviction that knowing the whole person sits at the center of good medicine. He approaches every visit with a collaborative, unhurried style and a goal of genuinely caring for each patient.
Education & Training
Undergraduate
University of San Francisco, Bachelor of Science, Biology, 1977
Medical School
University of Hawaii, John A. Burns School of Medicine, Doctorate of Medicine, 1981
Residency
Internal Medicine, University of Hawaii Integrated Medical Residency Program, 1982-1984
Additional Training
Internship: University of Hawaii Integrated Medical Residency Program, Honolulu, HI, 1981-1982
Certifications
Conditions Treated
Who is Dr. Ragunton right for?
Dr. Ragunton is a strong fit for adults managing chronic conditions such as diabetes, hypertension, cardiovascular disease, or thyroid disorders. Patients who value a long-term relationship with a single, dedicated physician tend to thrive under his care. His preventive focus suits adults who want advanced metabolic, cardiovascular, and cognitive screening as part of their annual wellness. Anyone seeking unhurried, collaborative appointments with a physician reachable around the clock will find his practice well-suited to their needs.
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Frequently Asked Questions
Dr. Ragunton focuses on diabetes, cardiovascular disease, hypertension, thyroid conditions, and preventive medicine. He has developed these clinical interests over more than 30 years of practice in Aiea. His approach emphasizes catching and managing these conditions early through comprehensive screenings and advanced diagnostics.
Yes. Dr. Ragunton holds Diplomate status from the American Board of Internal Medicine and has maintained board certification for more than 35 years. He also holds Diplomate status from the National Board of Medical Examiners and is licensed to practice in Hawaii.
Dr. Ragunton completed his medical degree at the University of Hawaii, John A. Burns School of Medicine in 1981. He then completed both his internship and internal medicine residency at the University of Hawaii Integrated Medical Residency Program in Honolulu, finishing his residency in 1984. He earned his undergraduate degree in Biology from the University of San Francisco in 1977.
Dr. Ragunton has practiced in Aiea for over 30 years. That depth of community presence means he brings substantial local knowledge and long-term patient relationships to his practice.
Dr. Ragunton takes a collaborative, whole-person approach to medicine. He conducts appointments in a relaxed, unhurried atmosphere and prioritizes listening to patient concerns. His goal is to care for patients in a genuinely caring and collaborative manner, a principle he has held since applying to medical school.
Dr. Ragunton sees his patients directly. The practice does not substitute nurse practitioners or physician assistants for office visits, so members always meet with Dr. Ragunton at their appointments.
Dr. Ragunton holds affiliation with Pali Momi Medical Center in Hawaii. This affiliation supports coordinated care for members who need hospital-level services.
Yes. Dr. Ragunton can assist members who need urgent care while traveling by helping coordinate care with local hospitals, pharmacies, or physicians. This travel support is part of the MDVIP membership benefits available through his practice.
Doctor profile last updated June 6, 2026