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Our Physicians


Mark A. Kalchbrenner, D.O.
Mark A. Kalchbrenner, D.O.


Dr. Mark Kalchbrenner is a graduate of Chicago College of Osteopathic Medicine. He served his Internship and Residency in Obstetrics & Gynecology at Flint Osteopathic Hospital in Flint, MI. He completed a Fellowship in Maternal-Fetal Medicine at Pennsylvania Hospital in Philadelphia, PA in 1988. He is board certified in Obstetrics & Gynecology and Maternal-Fetal Medicine.  Dr. Kalchbrenner was the Director of Maternal-Fetal Medicine at Rockford Regional Perinatal Center, Rockford, IL. He is now in private practice and medical director of High Risk Obstetrics and Diagnostics in St. Charles, IL and Crown Point, IN. 


Thomas A. Losure, D.O.
Thomas A. Losure, D.O.


Dr. Thomas A. Losure is a graduate of Chicago College of Osteopathic Medicine. He served his Internship and Residency in Obstetrics & Gynecology at Chicago Osteopathic Hospital. He completed a Fellowship in Maternal-Fetal Medicine at Pennsylvania Hospital in Philadelphia, PA in 1984.  He is board certified in Obstetrics & Gynecology and Maternal-Fetal Medicine.  Dr. Losure is the former Director of Women's Services at Rockford Regional Perinatal Center, Rockford, IL. He is now President of High Risk Obstetrics and Diagnostics and is in private practice in St. Charles, IL and Crown Point, IN. 




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