What Causes OCD?

H. Blair Simpson, M.D., Ph.D.

“The simple answer is that we don’t know what causes OCD … We have a lot of clues … We think OCD is caused by some combination of genes, the environment and development …”




Helen Blair Simpson, M.D., Ph.D.
2010 NARSAD Independent Investigator Grantee
Professor of Clinical Psychiatry
Director of the Anxiety Disorders Clinic
New York State Psychiatric Institute