Dr. Nancy Mullan graduated from the University of Pennsylvania and Tufts University School of Medicine. She studied Psychiatry and Child Psychiatry at the University of Chicago Hospitals and Clinics.

After coming to Los Angeles, Dr. Mullan joined the medical staff at Cedars-Sinai Medical Center and was a Clinical Instructor at the UCLA School of Medicine. She earned Psychoanalytic Certification from the Psychoanalytic Center of California. In 1989 she began to practice Nutritional Medicine. She taught in the Department of Family Medicine at the University of Southern California School of Medicine in Los Angeles.

Currently, Dr. Mullan is practicing Nutritional Medicine and Psychiatry in Burbank, California, treating children on the Autism Spectrum and adults with physiologically based emotional disorders.