Dr. John Marshall Knox

Board Certified Dermatologist


Dr. Knox brings a wealth of expertise with over 25 years of professional experience in Dermatology and a Masters of Public health, with an emphasis on the environment and toxicology, specializing in the treatment of skin cancer and diseases of the skin, hair and nails. 

At The Texas Medical Center, the largest medical center in the world, Dr. Knox studied to become a Doctor of Medicine and Master of Public Health. Dr. Knox comes from an accomplished family of physicians and scientists. After becoming board certified, Dr. Knox joined his father; former Chairman of the Department of Dermatology at Baylor College of Medicine and past President of the American Board of Dermatology, in their private practice of dermatology. Other doctors in the family include, a great grandfather who was a General Practitioner, an uncle and stepfather who were also Dermatologists, a son with a PhD in artificial intelligence who is currently doing his post doc at MIT, and his youngest son who is a premed/biomedical engineer major at the University of Colorado Boulder.

Dr. Knox enjoys practicing medical and surgical dermatology. Over most of his career he has had the privilege of teaching Dermatology to doctors in their residency training programs as a section Chief at a teaching hospital in Houston and a Dermatology Department Chairman in Seattle. 

Outside of medicine Dr. Knox loves hiking, boating, organic farming, cycling, training dogs and all the outdoor activities that come with living in Hawaii.

Dr. Knox previously ran his own practice on the island of Maui. Complete Dermatology welcomes Dr. Knox back to the Hawaiian islands as he joins our Ohana in bringing you superb medical care with the Aloha spirit.