Marc S. Williams, MD, FAAP, FACMG is a clinical geneticist. As of January 2012, he has been the director of the Genomic Medicine Institute of the Geisinger Health System in Danville, Pennsylvania.  He is the co-PI of the Geisinger Electronic Medical Records in Genomics (eMERGE) project and is the medical director of the whole genome sequencing clinical research project. He represents Geisinger Health System on the NHGRI funded Genomic Medicine working group.

He has participated in the Personalized Medicine Workgroup of the Department of Health and Human Services’ American Health Information Community Task Force, chaired the CDC’s EGAPP Stakeholder’s Group and was a member of the Secretary’s Advisory Committee for Genetics, Health and Society. He was recently appointed to the EGAPP working group.  He is past chair of the Committee on the Economics of Genetic Services of the American College of Medical Genetics and Genomics and founded the ACMG Quality Improvement Special Interest Group. He is a member of the Clinical Pharmacogenetic Implementation Consortium and has participated in guideline creation and review for that group. He was Geisinger’s representative to the Clinical Decision Support Consortium.  He has authored over eighty articles including many focused on genetics and informatics.