Derek-IllastronDerek Illastron M.D.

Internal Medicine
Joined MMG in February 2016

Dr. Illastron received his medical degree at Ross University School of Medicine in Portsmouth, Dominica; and obtained his postdoctoral training at UMNDJ-Newark Medical School in Newark, N.J. Prior to joining Maui Medical Group, Dr. Illastron practiced as Primary Care Physician at Cambridge Health Alliance at Everett and Revere, MA; Harvard Vanguard in Boston, MA; Pentucket Medical Haverhill, MA; and, most recently, Cambridge Health Alliance Community Health Clinic in Everett and Revere, MA. Dr. Illastron works in our Pukalani and Wailuku clinics.


California State University East Bay Undergraduate in Biological Science and minor in Chemistry

Ross University School of Medicine – MD degree


American Board of Internal Medicine – Certified in 2008

Professional Activities

American College of Physicians

American Medical Association

Special Interests



Thyroid Disorders

Congestive Heart Failure

Personal Interests



Traveling with my partner