An internist is a primary care physician who treats both common and complex illnesses, usually only in adults. You’ll likely visit them or your family doctor first for most medical conditions. Internists often have advanced training in a host of subspecialties, like heart disease, cancer, or adolescent or sleep medicine. If you or a loved one has suffered injury, illness or death due to an internist mistake please contact our medical malpractice lawyers right away. They handle internist malpractice lawsuits in all 50 states, Puerto Rico and Washington D.C.