Board-Certified Psychiatrist


Sean P. Heffernan, M.D. is a psychiatrist who specializes in the treatment of mood disorders and people with chronic medical illnesses. He treats adolescents older than age 16 and adults. He provides comprehensive and personalized care for all of his patients; this includes medication management and therapy.

Dr. Heffernan is trained to provide expert care for people with mood disorders (major depressive disorder, bipolar disorder type I, and bipolar disorder type II) and anxiety disorders (panic, generalized anxiety, specific and situational phobia, and obsessive compulsive disorders). He is also trained in treatment of attention disorders (attention deficit disorder and attention deficit/hyperactivity disorder), demoralization, grief, and substance use disorders.

Beyond the training of a general adult psychiatrist, Dr. Heffernan has completed two fellowships for specialty training in psychosomatic medicine and treatment-refractory mood disorders, at Massachusetts General Hospital and Johns Hopkins Hospital, respectively. Psychosomatic medicine is a subspecialty in psychiatry that focuses on treatment of people with both psychiatric and medical illnesses, such as cancer, organ transplantation, cardiovascular diseases, traumatic brain injury and other neurologic disorders, and HIV. 

It is much more important to know what sort of a patient has a disease
than what sort of a disease a patient has.
— Sir William Osler, M.D., Johns Hopkins Hospital


  • Board-Certified by the American Board of Psychiatry and Neurology.
  • Board-Certified by ABPN in Psychosomatic Medicine Specialty.
  • Licensed by Maryland State Medical Board.
  • Member of American Psychiatric Association (APA).
  • Member of Academy of Psychosomatic Medicine (APM).
  • Editorial role with APM.