Meet the Team! Click on any of the doctors names below the image to learn more about them.


Dr. DuncanDr. Hornback

New Patients Welcome

Thank you for choosing McCrary-Rost Clinic and Stewart Memorial Community Hospital for your prenatal care. The birth of a child is a treasured memory and we are honored you have chosen our healthcare team to be a part of your special experience. Our team of physicians, physician assistants and nurse practitioners are dedicated to working together for you and your baby. We are committed to:

  • Providing a devoted, experienced healthcare team to take care of you and care for your baby before, during and after delivery.
  • Offering educational childbirth classes to help prepare you for a positive birth experience.
  • Beautiful labor and delivery suites with a calming environment, whirlpool bath, extra sleep accommodations, high-tech security system and room service meals prepared fresh when you are ready to eat.
  • Providing comprehensive and sophisticated services you expect with a personal touch.

Although every pregnancy is different, the majority of our expectant Moms can look forward to having an appointment scheduled with us about once a month until reaching 28-30 weeks, followed by visits every 2 weeks until reaching 36 weeks, and then weekly visits until delivery. In some circumstances your appointments may be more frequent due to complications, high-risk situations, or simply to alleviate any lingering concerns you may have as a Mom-to-be. Most of your visits will be routine and consist of weighing you, checking your blood pressure, urine, measuring your uterus, listening to your baby’s heart beat and asking you questions about how the pregnancy is progressing. Here at McCrary-Rost Clinic we use a team approach to caring for you and your baby. At the beginning of your pregnancy your Primary Physician will oversee your care. Throughout your prenatal care you will see all of our Obstetric Physicians so they will be up to date on your pregnancy as our OB team shares in coverage of Obstetric calls during nights and weekends. Thank you for entrusting us with your care during this special time. If you have any questions, please call us at your convenience at 1-800-560-7500. We are happy to answer any questions for you and we look forward to welcoming your tiny miracle. Take a Tour of our beautiful labor and delivery unit where you and your baby will see each other for the first time. The tour is free of charge and can be set up at a date and time convenient for you. For a tour please call Jenni Macke, Director of OB an RN, at 712-464-3171 ext. 6285. Our goal is to provide quality care throughout your pregnancy and help you have a joyful experience delivering a healthy baby.

Dr. Susan Hornback
Susan Hornback, D.O.
Lake City, Iowa
Stewart Memorial Community Hospital
Board Certified Family Physician


Dr. Susan Hornback is a board certified family physician and offers a full range of family care. This includes Obstetrics, Pediatrics, Women’s Care and Adult Medicine. She is available for OB and Family Care appointments four days a week at Lake City. Dr. Hornback, a Des Moines native, earned her Doctor of Osteopathic Medicine degree from Des Moines University Osteopathic Medical Center. She completed her residency at Iowa Lutheran Family Medicine in Des Moines. She is a member of the American Academy of Family Physicians and the American Medical Association. In 2005, Dr. Hornback was awarded the Dr. Greg Smith Award for compassion, competence and bedside manner. When Dr. Hornback is not caring for patients, she spends time with her husband Jeff and their four children.

Dr. Duncan
Derek Duncan, D.O.
Lake City, Iowa
Stewart Memorial Community Hospital
Board Certified Family Physician


Dr. Duncan is a board certified family physician and offers a full spectrum of family care including Obstetrics, Pediatrics, and Adult Medicine. Dr. Duncan also focuses on family planning and infertility. He is available for OB & Family Care Appointments five days a week in Lake City. He’s a graduate of Drake University, Des Moines University Osteopathic Medical Center and Via Christi Family Medicine Residency Program. He is a member of the American Academy of Family Physicians, and the American Medical Association. Dr. Duncan is a avid Hawkeye fan, enjoys golfing and spending time with his family.