Dr. Greissinger serves as Medical Director of the Partial Hospitalization Program in the Elizabeth Lee Black School.

Dr. Greissinger earned bachelor’s degrees in chemistry and biology from Greenville College, and a doctor of Osteopathy degree from Des Moines University. She completed a residency in Internal Medicine at Lehigh Valley Hospital and a residency in psychiatry at Allegheny General Hospital.

Dr. Greissinger is board certified in Psychiatry by the American Board of Psychiatry and Neurology and she provides psychiatric support to multiple facilities in the community.