Steven Keiles MS, LCGC

Director, Genetics Counselor Organization
Phone: 949-728-4247

About the Counselor

Steven Keiles is the Director, Head of the Genetic Counselor Organization at Quest Diagnostics. Mr. Keiles is a leader in the fields of pediatric, adult and prenatal genetic counseling, and clinical diagnosis at Quest. 

Areas of Specialization

Mr. Keiles is a healthcare professional with specialized interest in molecular diagnostic testing for hereditary cancers, cystic fibrosis, pancreatitis, next generation sequencing for multi-gene panels, and exome sequencing. 

Professional Affiliations

Mr. Keiles is a member and past President of the National Society of Genetic Counselors 


M.S. in Genetic Counseling 
Sarah Lawrence College 
Bronxville, New York, USA 

Board Certifications

American Board of Medical Genetics 
American Board of Genetic Counseling 
California State License in Genetic Counseling 

Select Publications 

Steven Keiles and Taosheng Huang, (2012) Textbook of Clinical Pediatrics, Approach to single gene disorders. 

Chong HK, Wang T, Lu HM, Seidler S, Lu H, Keiles S, Chao EC, Stuenkel AJ, Li X, Elliott AM, (2014) The Validation and Clinical Implementation of BRCAplus: A Comprehensive High-Risk Breast Cancer Diagnostic Assay, PLoS One. May 15;9(5) 

Laduca H, Stuenkel AJ, Dolinsky JS, Keiles S, et. al. (2014), Utilization of multigene panels in hereditary cancer predisposition testing: analysis of more than 2,000 patients, Genet Med. Apr 24 

Langfelder-Schwind E, Karczeski B, Strecker MN, Redman J, Sugarman EA, Zaleski C, Brown T, Keiles S, Powers A, Ghate S, Darrah R., (2014) Molecular testing for cystic fibrosis carrier status practice guidelines: recommendations of the National Society of Genetic Counselors, J Genet Couns. 2014 Feb;23(1):5-15 

Lisa Prach, Ruth Koepke, Martin Kharrazi, Steven Keiles et. al. (2013) Novel CFTR variants identified during the first three years of cystic fibrosis newborn screening in California, Journal of Molecular Diagnostics, Sep;15(5):710-22

Additional Publications