Dr. Mugiishi is a member of the board of directors and has served on the board of First Hawaiian Bank, since December 2022. He has served as the President and Chief Executive Officer of Hawaii Medical Service Association, the Blue Cross Blue Shield Licensee of Hawaii and largest health insurer in the state, since February 2020. Dr. Mugiishi co-founded the Endoscopy Institute of Hawaii and the Eye Surgery Center of Hawaii, and was a medical director at Hawaii technology accelerator start-ups.

Dr. Mugiishi is currently on the board of the Blue Cross Blue Shield Association, serving as the Chair of the Ignite Coalition, Blue Cross Blue Shield and the BCBSA Clinical Advisory Committee of the Board. He is a member of the Board of Directors of the Blood Bank of Hawaii, Hawaii Business Roundtable and the Chair of the ‘Iolani School Board of Governors.

Dr. Mugiishi holds a medical degree from Northwestern University Feinberg School of Medicine.