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Dr. Shimer grew up in Pittsburgh, Pennsylvania. He attended college at University of Notre Dame and attended Baylor College of Medicine in Houston, Texas for both medical school and residency training. He then was in private practice for 4 years in North Carolina prior to coming to Texas. While in North Carolina, he was also involved with teaching residents at University of North Carolina at Chapel Hill where he was a clinical instructor.

Dr. Shimer returned to Texas in 2001 where he started Craig Ranch OB-GYN which is now a very busy practice located in McKinney, Texas.  He has become one of the leaders in Dallas with in-office procedures including the endometrial ablation performed for heavy menstrual cycles and the Adiana procedure performed for permananent sterilization.  He served on the Advisory Board for Hologic to assist in the development of the latest Novasure endometrial ablation device and was one of the first physicians in the country performing the Adiana procedure.

Dr. Shimer and his family reside in Frisco, Texas and spend significant time in the summer at Cedar Creek Lake.  He has recently opened a satellite office in Mabank to bring his expertise on in-office procedures to the area.