Dr. Robert Ruggieri


Robert Ruggieri MD

Board Certified Emergency Medicine

Robert Ruggieri MD was born & raised in RI. He attended the University of Rhode Island and Stanford University to attain a Master’s degree in Mechanical Engineering.

He moved to Hawaii in 1983 and later attended UH-John A. Burns School of Medicine from 1987-1991.

He completed his residency in Emergency Medicine in Massachusetts in 1994, and worked there until 1999 when he returned to Hawaii to work in Queen’s Hospital until 2006 when he opened “Kahala Urgent Care”, soon to become what is now known as Island Urgent Care.

He continues to work at all 3 locations and enjoys family time and mountain biking and kite-surfing in his spare time.


Cathy Oliver MD

Board Certified Emergency Medicine

Catherine Oliver was born in California but moved with her family to the Big Island when she was 8 years old.

She attended Tufts University where she obtained her undergraduate degree in Biology and UH-John A. Burns School of Medicine for her medical degree. She completed her residency in Emergency Medicine at Stanford in 2004.

She then returned to Hawaii to work in the Emergency Department at Queen’s Medical Center until 2013 when she joined Island Urgent Care.

When asked about what she does in her spare time activities she laughs and says “LAUNDRY”, but then remembers that aside from this she enjoys spending time with her family and occasionally picks up her guitar, and reads whenever she can.

Dr. Juan Perez photo


Juan Perez MD

Board Certified Emergency Medicine

Dr. Perez completed medical school at the University of California at Los Angeles in 1999.

He then trained at Brigham and Women’s Hospital, a Harvard Medical School affiliate. He has been Board Certified in Emergency Medicine (ABEM) for 12 years.

He has been a resident of Hawaii for over a decade.

In his leisure time, he enjoys surfing and hiking trails with his wife and children.


Leslie Hsiung MD

Board Certified Family Medicine

Dr. Leslie Hsiung is a recent transplant to Hawaii, having completed medical school at New York Medical College, residency training in Family Medicine at Beth Israel Medical Center, and private practice for 2 years in New York City before escaping to Honolulu in 2014.

She enjoys cooking, swimming, surfing, and spending time with her dog Benny outside of work. 

Dr. Leslie Hsiang photo


Thinh Ho MD

Board Certified Family Medicine

Dr. Thinh Ho was born in an educated family. He initially entered the medical field to follow his father’s wish. In Vietnam, doctors were always scarce and there were too many ill people.  Due to this, his goal was to help humanity and lessen their pain. Soon, his love for medicine blossomed and so did his passion for saving lives. He completed his training in general medicine in 1992 in Saigon, Vietnam. He received a degree in Pediatrics at the Royal Children’s Hospital and Melbourne University in Australia by 2000. In 2004, Dr. Ho immigrated to the United States to be united with his family, after practicing for more than 10 years at ISOS International Clinic and Children’s Hospital No. 1 in Saigon, Vietnam.

He completed residency in Family Medicine at Yeshiva University and Montefiore Medical Center in North Bronx, New York in 2009. After residency, he practiced in Tacoma, Washington where he also ran his own family medicine clinic. This was his way of helping out the Vietnamese community. In July 2016, he moved to Honolulu to be close to his big family. He enjoys family time the most, especially with his wife and two children.

Dr. Ho loves his new home. He enjoys working on his garden with his wife. In the end, he wishes to continue serving humanity and ease suffering worldwide.


Lisa Boonprakong MD

Board Certified Emergency Medicine

Lisa Boonprakong M.D.
Lisa Boonprakong is an island girl at heart, but with roots starting in the Mid-West. Lisa was born in Missouri and grew up on the island of Guam, as her parents originally from Thailand ended up in the Marianas on their way back home.

She completed her high school education in California, then attended Wellesley College where she obtained a B.A. in Biology, and then onto the University of Hawaii John A. Burns School of Medicine for her medical degree.

She completed her Emergency Medicine residency at UCLA-Olive View in 2005.  Upon completion of residency, she returned to Hawaii, working with Hawaii Emergency Physicians Associated attending at Castle Medical Center and Wahiawa General Hospital until 2010 when she joined Island Urgent Care.

She enjoys spending time with her four “boys” – her husband, two boys, and their dog “Hercules” – spending time in the water and outdoors.

Dr. Chad Wasden photo


Chad Wasden MD

Board Certified Emergency Medicine

Dr. Wasden comes to Island Urgent Care as an experienced ER physician who truly cares for the well-being of his patients.

Dr. Wasden had practiced medicine at Castle Medical Center and Wahiwa General Hospital, where he was able to make an important contribution in treating the local community.

Dr. Wasden performed his residency in Emergency Medicine and the University of Nevada, Las Vegas and attended the University of Utah, School of Medicine.

Dr. Wasden enjoys architecture, snowboarding, hiking and traveling.

Candace Corcoran MHA CPC

Vice President of Operations

Candace A. Corcoran comes with 20+ years of vast health care experience. Her experience includes but not limited to health care quality and documentation, coding, auditing, provider training, EMR implementations, business plans, urgent care clinic build outs and design, training programs, strategic growth planning, physician and employee performance programs, business analysis, and reimbursement strategies and contracting. She holds a Masters in Health Care Administration from the University of Phoenix, she is a Certified Professional Coder (CPC), and currently NIOSH Certified, only to list a few. Her never ending energy in producing excellence with quality and satisfaction is always in motion.

Candace loves shoes, traveling abroad, hiking, running, sun and beaches. Her love for the outdoors complements her island lifestyle.  Challenge is her middle name and finding resolution is her game!

Candace Corcoran photo
David Otoshi photo

David Otoshi


David Otoshi is a Controller Accountant.  He has been working in the Accounting Profession here in Hawaii for the past 25 years with most of his experience as a Controller for manufacturing and retail industry companies where he has experience being responsible for the Accounting Department which included Human Resources, Payroll, Accounting controls, and policies.

The best part of his career is not just working with numbers but learning new things and working with vendors and other departments.  His education is from the University of Hawaii with a BBA in Business Administration majoring in Accounting.  He now enjoys the challenge of working in the Urgent Care Medical Service industry where his goal is to use his experience and knowledge to help the company grow and thrive.

He enjoys investing and his motto is “Invest for the Long Run”.

April Mirafuentes

CCMA, NHA, IUC Coordinator

April Mirafuentes is a clinical certified medical assistant, obtaining her certification in 2012. A 2012 alumna of Heald College, April joined IUC in March 2012.

April is a member of the National Healthcareer Associates, Clinical Medical Assistant (CCMA). She has work experience in both back office and administrative capacities. April is currently Island Urgent Care’s Coordinator.

April is always organizing, coordinating and helping the staff and physicians in providing quality care.

Her biggest passion in life is to help others achieve their goals.

April Mirafuentes photo





Island Urgent Care
4218 Waialae Ave. A106
Honolulu, HI 96816

Tel : 808 735-0007
Fax : 808 735-0021


Island Urgent Care
6600 Kalanianaole Hwy, Suite 114A
Honolulu Hawaii 96825

Tel : 808 735-0007
Fax : 808 735-0021


Island Urgent Care
449 Kapahulu Ave Suite 104
Honolulu HI 96815

Tel : 808 735-0007
Fax : 808 735-0021

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