Dr. Ko is a graduate of the Northeastern Ohio Universities College of Medicine where he completed an eminent six year BS/MD program with honors. Dr. Ko graduated college in two years before completing his allopathic medical school training. He was inducted into the Alpha Omega Alpha society his junior year in medical school, marking him among the top ten percent of medical students in the United States. Moreover, Dr. Ko received an exclusive honor by being voted in as Vice-President of the Alpha Omega Alpha Zeta chapter of Ohio. He served a 2 year term. Dr. Ko completed his residency at the prestigious Cleveland Clinic Foundation, one of the top hospitals and research facilities in the world. While at the Cleveland Clinic Foundation, Dr. Ko served as Chief Resident in Dermatology. In addition, he has worked and trained among recognized leading experts of dermatological disorders. Dr. Ko is among the most experienced and well-versed clinical researchers of dermatological disorders in the state of Arizona and is well published in medical literature. He acts as a consultant to numerous pharmaceutical companies and remains on the cutting edge of dermatologic advances. Dr. Ko has participated in clinical trials pertaining to the areas of psoriasis, acne, eczema, infectious disease, skin cancer, and skin aging. William Ko M.D. is considered a key opinion leader in dermatology and has lectured around the country educating his peers in the areas of psoriasis, cutaneous oncology, immunology, and infectious diseases in dermatology. His training and expertise are comprehensive and include Mohs surgery, cutaneous oncology, medical dermatology, oral medicine, hair transplantation, and skin aging. Dr. Ko was honored by his local peers by being elected President of the Phoenix Dermatological Society from 2008-2010. He serves as the official dermatologist for the Phoenix Sun’s and Phoenix Mercury organizations and is a multiple recipient of Phoenix Magazine’s TOP DOCTOR honor (2004-2020). Dr. Ko was raised in Columbus, Ohio and maintains the humble and genuine traits instilled during his midwest upbringing. He enjoys sports, reading, personal fitness and time with his family. He joined Arizona Dermatology in 1998 upon the completion of his residency. Dr. Ko is a member in good standing at Scottsdale North Hospital Healthcare, John C. Lincoln Hospitals, Arrowhead Hospital, Mesa Lutheran Hospital, Phoenix Baptist Hospital, and Maryvale Hospital. Dr. Ko works at the following locations, specializes in the following services and is active and involved at the local, regional and national level with the following organizations.