Hilltop Obstetrics & Gynecology Physicians and Staff

Gregory W. Siewny, MD

Dr. Siewny has been providing quality medical care at Hilltop Obstetrics & Gynecology since 1986. He is a graduate of the Ohio State University School of Medicine and completed his internship and residency in Obstetrics & Gynecology at Bethesda Hospital in Cincinnati, Ohio. Dr. Siewny is board certified in Obstetrics & Gynecology. A native of Middletown, he continues to reside there with his wife, Jeanne. They have four children. Dr. Siewny loves to keep the office entertained with his quirky football and basketball pools. He also stays busy visiting his kids that are scattered throughout the United States. Dr. Siewny also loves to play golf when the weather and time allow.

Charles L. Hageman, MD

Dr. Hageman, a native of Cincinnati, graduated from the University of Cincinnati, College of Medicine. His internship and residency were completed in Obstetrics & Gynecology at Bethesda Hospital in Cincinnati, Ohio. Dr. Hageman is board certified in Obstetrics & Gynecology and joined Hilltop in 1988, shortly after serving in private practice elsewhere. He resides in Middletown with his wife, Ann. They have 2 grown children and 1 grandson. Always the “office cut-up” you will often times find him telling a joke, or sneaking up behind someone to scare them. Dr. Hageman and his wife also love summers, when their grandson from Florida, comes up and stays for a couple months. Space Camp was a highlight for him and his grandson a couple summers ago.

William J. Andrew, MD

Dr. Andrew graduated from the University of Cincinnati, College of Medicine, where he did his internship in the Department of Family Medicine. His residency was completed at Bethesda Hospital in Cincinnati through the Department of Obstetrics & Gynecology. Dr. Andrew is board certified in Obstetrics & Gynecology and joined Hilltop in 1995. He resides in Middletown with his wife Marcia. They have 3 grown children and have traveled extensively to watch their middle son swim in national and Olympic trials. If Dr. Andrew is missing from the office, we also know to check the pool at the YMCA next door, as he also is an avid swimmer.

Heather Hilkowitz, MD

Dr. Hilkowitz graduated from Wright State School of Medicine and completed her Obstetrics & Gynecology residency at Indiana University School of Medicine in Indianapolis, Indiana. She left private practice in Cincinnati to join Hilltop in 2007. Dr. Hilkowitz is board certified in Obstetrics & Gynecology. She and her husband, Fred, live in Liberty Township with their twins. Dr. Hilkowitz is having a hard time splitting her time between being a hockey mom for her son, and a soccer mom for her daughter. It certainly keeps her busy. She also loves to experiment in the kitchen when time allows.

Casey Boyce, MD

Dr. Boyce joined Hilltop Obstetrics & Gynecology in 2007 after graduating from Boonshoft School of Medicine at Wright State University. She served as Chief Resident of the Wright State University Obstetrics & Gynecology program in Dayton, Ohio. Dr. Boyce is board certified in Obstetrics & Gynecology. She and her husband, Scott, reside in Franklin Township with their two children. Dr. Boyce coaches volleyball for her daughter’s school team, and loves to watch her son in whatever sport the season brings. She and her family raise Alpacas on their property, and her daughter has started raising and showing hogs at the county fair.

Juan C. Reina, MD

Dr. Reina obtained his medical degree from Universidad del Valle in Cali, Colombia and completed his Obstetrics & Gynecology residency at Tulane University School of Medicine in New Orleans, Louisiana. He left private practice in the Greater Cincinnati area to join Hilltop in 2008. Dr Reina is Board Certified in Obstetrics & Gynecology. He resides in Liberty Township with his wife, Mariarosa, and their twin girls. Dr. Reina’s daughters keep him and his wife busy with all their activities, including piano lessons, tennis, and French lessons. They also love to travel to different destinations each year. He is also a huge Star Wars fan.

Rhonda Washington, MD

Dr. Washington graduated from Wright State University School of Medicine and completed her Obstetrics & Gynecology residency at Indiana University School of Medicine in Indianapolis, Indiana. She is board certified and joined Hilltop in 2013. Dr Washington resides in Liberty Township with her husband, Marcus Washington, and their 6 growing children. Dr. Washington is heavily involved in her graduate service sorority, Alpha Kappa Alpha, and serves as the Foundation fundraising chair. She also stays busy traveling from one sporting event to another for her children.

Amy Renshaw, MD

Dr. Renshaw joined Hilltop in 2013 after completing her Obstetric and Gynecology residency at Case Western Reserve University School of Medicine in Cleveland, Ohio. She completed medical school at University of Louisville School of Medicine. Dr Renshaw is board certified in Obstetrics & Gynecology. She is originally from Owensboro, KY and now resides in Mason, Ohio with her husband Nate. Dr. Renshaw loves to experiment in the kitchen and keeps her trim figure by working out at either Orange Theory or Pure Barre. Her and her husband are also proud parents to Harold, their adorable basset hound.

Ronald Hirth, MD

Dr. Hirth is a board certified physician that joined Hilltop in 2014. He graduated from Wright State University School of Medicine and completed his Obstetrics and Gynecology residency at Bayfront Medical Center in St. Petersburg, Florida. Dr. Hirth has been practicing in the Cincinnati area for the last 5 years. He currently resides in the Cincinnati area with his wife, Becky, and their daughter. Dr. Hirth loves to stay active hiking and traveling with his family. He also likes to cook and read to relax. Their daughter also keeps them hopping with all her activities including basketball, softball, soccer, and piano lessons.

Our Staff

Our clinical and administrative staffs compliment our physicians as members of your health care team. They have a genuine concern and interest in you, our patient. Our clinical staff will routinely gather information about your medical history. They also assist the physicians with the many procedures, examinations and testing we offer at our offices. Our administrative professionals will work with you to schedule convenient appointments and handle your questions about practice policies, fees, and insurance.

Our medical team is here to serve you. We know you have choices for health care and understand the many pressures women today face. Our physicians are board certified in Obstetrics & Gynecology and remain active in all facets of women's healthcare. We hope you find our Middletown, Lebanon and West Chester office locations convenient and our staff of professionals helpful and welcoming. We are proud to have served the Middletown and surrounding communities for over 25 years now, and we look forward to many more years.

Dr. Hageman