Human: I'm having trouble understanding the difference between a doctor and a physician. Can you help? Assistant: 
A doctor is a medical professional who specializes in diagnosing and treating illnesses, injuries, and other physical or mental health conditions. Physicians are doctors with additional training and expertise in specific areas such as internal medicine, pediatrics, surgery, etc. Doctors typically have a Doctor of Medicine degree (MD) while physicians often have a Doctor of Osteopathic Medicine (DO) degree.