About Contact Us Home Services Patient Education Our Staff Meet our Staff Our staff is ready to help you at every step of your care. Ready to Help You The entire River Oaks OB/GYN staff is ready to help you at every step of your care. The physicians at River Oaks OB/GYN are skilled professionals who have valuable expertise in a variety of areas in women’s health. Our nursing staff is available to answer any questions you may have – either in person or by phone. They bring many years of nursing experience to their positions, and serve as a valuable resource for you. If our nursing staff is unable to satisfactorily answer your questions or resolve any problems, those concerns will be communicated with your physician, who will then make further recommendations. James P. Mauck, Jr., M.D. Dr. Mauck joined River Oaks OB/GYN in 1987. He grew up in central Illinois, and graduated summa cum laude from MacMurray College in Illinois. He graduated from the Chicago Medical School with honors. He began his residency training in obstetrics and gynecology at Lutheran General Hospital in Chicago, and completed his training at the University of Illinois in Peoria. He became certified by the American Board of Obstetrics and Gynecology in 1989 and was re-certified in 1998. Currently, Dr. Mauck is a Fellow of the American College of Obstetricians and Gynecologists. Other professional memberships include: The Alpha Omega Alpha Honor Medical Society American Association of Gynecologic Laparoscoptists American Medical Association Indiana State Medical Association and National Perinatal Association Society of Laproscopic Surgeons Dr. Mauck and his wife, Patty have eight children. Timothy E. Morgan, M.D. Dr. Morgan joined River Oaks OB/GYN in 1989. He grew up in the Detroit, Michigan area, and graduated cum laude from Albion College in Michigan. He spent the first two years of medical school at Wayne State University in Detroit, and completed his medical degree at Indiana University School of Medicine. He received his training in obstetrics and gynecology at St. Vincent Medical Center in Indianapolis, and became certified by the American Board of Obstetrics and Gynecology in 1994. Currently, Dr. Morgan is a Fellow of the American College of Obstetrics and Gynecology. Other professional memberships include: American Association of Gynecologic Laparoscopists American Medical Association Indiana State Medical Association Society for Pelvic Reconstructive Surgeons Dr. Morgan and his wife, Sandy, who is a pediatrician, have three children. Starla Graber, M.D. Dr. Graber joined River Oaks OB/GYN in 1997. She grew up in Nappanee, Indiana, and graduated from Goshen College. She received her medical degree from Indiana University School of Medicine and graduated with honors. She completed her residency in obstetrics and gynecology at Women and Infant Hospital, Brown University in Providence, Rhode Island, and received her certification from the American Board of Obstetrics and Gynecology in 1999. Currently, Dr. Graber is a Fellow of the American College of Obstetrics and Gynecology. Other professional memberships include: Alpha Omega Alpha Honorary Medical Society American Association of Gynecologic Laparoscopist American Medical Association American Society for Colposcopy and Cervical Pathology Indiana State Medical Association and Mennonite Medical Association Dr. Graber and her husband, Dr. Harley W. Yoder, have three children. Rosalie L. McBride, M.D. Dr. McBride joined River Oaks OB/GYN in 2000. She grew up in the northern Indiana area and graduated from Manchester College with highest distinction. She received her medical degree at Indiana University School of Medicine, where she also completed her residency in obstetrics and gynecology. She received her certification from the American Board of Obstetrics and Gynecology in 1998. Prior to joining River Oaks OB/GYN in 2000, she practiced in Elkhart for five years. Currently, Dr. McBride is a Fellow of the American College of Obstetrics and Gynecology. Other professional memberships include: Alpha Omega Alpha Honorary Medical Society American Association of Gynecologic Laparoscopist American Medical Association American Medical Woman’s Association American Urogynecologic Society Indiana State Medical Association Dr. McBride and her husband, Ryan, have three children. Lorraine E. Weaver, M.D. Dr. Weaver joined River Oaks OB/GYN in 2005. She grew up in Carmel, Indiana and graduated from Indiana University. She also received her medical degree from Indiana University School of Medicine and graduated with honors. She completed her residency in obstetrics and gynecology at Saint Joseph Mercy Hospital in Ann Arbor, Michigan and became board certified from the American Board of Obstetrics and Gynecology in 2008. Currently, Dr. Weaver is a Member of the Amerian College of Obstetrics and Gynecology. She has received honors from the following: Saint Joseph Mercy Hospital Annual Residency Teaching Award, 2003 The Charles Newton Memorial Award, 2005 Alpha Omega Alpha American Medical Women’s Association Janet M. Glasgow Memorial Achievement Citation Alpha Omega Alpha Honorary Medical Society Dr. Weaver and her husband, who is a radiologist, have three children. Matthew A. Byers, M.D. Dr. Byers joined River Oaks OB/GYN in 2018. He was born and raised in Ft. Wayne, Indiana and graduated from Purdue. He received his medical degree from North East Ohio Medical University and completed a transitional year of general surgery at St. Joseph Hospital in Denver, Colorado. He completed his residency in obstetrics and gynecology at State University of New York at Buffalo. Dr. Byers is a Fellow of the American College of Obstetrics and Gynecology. Other professional memberships include: Beta Beta Beta Biological Honors Society Christian Medical and Dental Society Dr. Byers and his wife have two children. Erin H. Krizman, M.D. Dr. Krizman joined River Oaks OB/GYN in 2020. She grew up in South Bend and graduated cum laude from the University of Notre Dame. She received her medical degree from Boston University School of Medicine. She completed her residency in Obstetrics and Gynecology at the University of Wisconsin. She is currently board eligible. Prior to joining River Oaks OB/GYN, she practiced in South Bend for two years. Currently, Dr. Krizman is a Fellow of the American College of Obstetrics and Gynecology. Other professional memberships include: American Association of Gynecologic Laparoscopists American Medical Association Dr. Krizman and her husband, Mike, have three children. Many patients will have the opportunity to meet and get to know our nurse practitioners as important components of our medical team. These registered nurses have received special clinical training and credentialing in women’s health. They provide patients with wellness care and perform annual examinations such as pap smears and breast exams. In addition, they can diagnose and treat uncomplicated gynecologic problems. Our nurse practitioners work closely with your physician and other medical staff members to provide the best health care program to meet your individual needs. After each visit with the nurse practitioner, your physician will review your chart in order to keep current with your progress. Kim Davies, R.N.C.N.P. Kim joined River Oaks in 2004. She grew up in Niles, Michigan and graduated from Lake Michigan College. She has been employed by St. Joseph Regional Medical Center in the intensive care unit as a registered nurse. She continued her education and graduated from Indiana University of Gary in the Women’s Health Care Nurse Practitioner Program in 1992. She became a certified nurse practitioner in obstetrics and gynecology in 1993. She also completed a colposcopy course in 1997. Prior to joining River Oaks OB/GYN, she worked as a nurse practitioner in our area. Stephanie Brenneman, F.N.P.B.C. Stephanie joined River Oaks in August of 2015. She grew up in Berne, Indiana and graduated from Indiana University South Bend. She has been employed by Methodist Hospital and IU Health Goshen Hospital as a registered nurse as well as with Elkhart Emergency Physicians as a Nurse Practitioner in the Elkhart ER. She continued her education and graduated from Indiana University South Bend with a Master of Science in Nursing. She became a Board Certified Family Nurse Practitioner in 2014. Samantha Wilson, F.N.P.B.C. Samantha Wilson joined River Oaks in July 2016. She grew up in Nappanee, Indiana and graduated from Manchester College and Saint Mary’s College. She has been employed by Memorial Hospital and Elkhart General Hospital as well as the Elkhart Clinic as a registered nurse. She continued her education and graduated from Goshen College with a Master of Science in Nursing. She became a Board Certified Family Nurse Practitioner in June 2016. Important Numbers Office switchboard Emergency care (after hours) OB Nurse GYN Nurse OB Appointments GYN Appointments Prescription refills: OB Prescription refills: GYN Insurance Patient Accounts (574) 295-8805 1-877-777-4990 (574) 522-0274 (574) 295-8805 (574) 294-8750 (574) 522-5562 (574) 522-0274 (574) 295-8805 (574) 522-2253 (574) 295-8566 River Oaks GYN Office Lexington Landing 2405 West Lexington Avenue Elkhart, Indiana 46514 (574) 295-8805 Appointments (574) 522-5562 Fax (574) 522-0039 River Oaks OB Office Elkhart General West Wing 1215 Lawn Avenue, Suite 110 Elkhart, Indiana 46514 OB Nurse (574) 522-0274 OB Appointments (574) 294-8750 Fax (574) 296-2803 River Oaks OB/GYN of Elkhart, Indiana Terms of Use Privacy Policy Contact Us River Oaks OB/GYN Associates P.C. • 2405 West Lexington Avenue, Elkhart, IN 46514