Dr. Mark Jonathan Altchek, MD, is a dedicated internist with over 46 years of experience in Internal Medicine. He is known for his comprehensive approach to healthcare, treating a wide range of conditions, including diabetes, hypertension, chronic respiratory illnesses, and various acute illnesses. Licensed to practice in Merced, CA, and Canoga Park, CA, Dr. Altchek graduated from New York Medical College in 1977 and has completed his residency at SUNY Health Science Center at Brooklyn. Dr....