Dr. Laffey was born and raised in St. Louis. She attended the University of Missouri-Kansas City Medical School and graduated in 1996. Following medical school, Dr. Laffey trained in Family Practice at Saint Louis University from 1996 until 1999.

Dr. Laffey was in practice for six years with Saint Louis University prior to opening Gateway Physician. She has authored chapters for "The Essentials of Family Practice", and has had her research presented internationally.