Our physicians are board-certified ob-gyn specialists who have completed advanced training in their discipline. Our midwives and nurse practitioners have achieved the highest level of training and certification as well. These professionals are each dedicated to providing the highest quality of medical care. They believe it is important to establish a positive, lasting provider-patient relationship with each of their patients.
For your yearly exam and other routine and acute care, you may be seen by one of our midwives or nurse practitioners, who are fully qualified and certified to treat a variety of gynecological problems and concerns. They perform exams, evaluate problems, and provide counseling in most areas of gynecology. They are always in immediate contact with your physician when needed.
MacKenzie L. Arnold, WHNP-BC
Graduated with her Bachelors of Science in Nursing from Saginaw Valley State University. She completed her Masters of Science in Nursing at The Ohio State University majoring as a Women’s Health Nurse Practitioner. MacKenzie holds a State of Michigan license in nursing for advanced practice and is board certified in Women’s Health.
MacKenzie is originally from Bay City, Michigan. In her spare time she enjoys traveling to new destinations, coaching softball, attending sporting events and spending time with family and friends.
Wendy L. Bauer, MD, FACOG
graduated from the University of Michigan Medical School and completed her OB-GYN residency at William Beaumont Hospital in Royal Oak, Michigan. She is certified by the American Board of Obstetrics and Gynecology and is a Fellow of the American College of Obstetricians and Gynecologists. Dr. Bauer joined OB-GYN, P.C. in 1997 after completing her residency.
Originally from Bloomfield Hills, Michigan, Dr. Bauer is married and has three children. In her spare time, she enjoys volleyball, aerobics, running, stained glass projects and music.
Carly H. Davis, MD, FACOG
received her undergraduate degree at Kalamazoo College, and then went on to attend medical school at the Michigan State University College of Human Medicine. Dr. Davis completed her residency in OB-GYN at St. Joseph Mercy Hospital in Ann Arbor, Michigan, where she served as the 2011-2012 Academic Chief Resident. She is certified by the American Board of Obstetrics and Gynecology and is a Fellow of the American College of Obstetricians and Gynecologists. She has a particular interest in robotic gynecologic surgery.
She has training in minimally invasive surgery. This includes the Davinci Robot, laparoscopic surgery, laparoscopic hysterectomy, hysteroscopic sterilization and endometrial ablation procedures.
Originally from Dearborn, Michigan, she is married and has two children. She enjoys reading, traveling, camping, cooking and spending time with her family. Dr. Davis is very excited to be back in the Kalamazoo area!
Marcia L. Johnson, MD, FACOG
graduated from the Wayne State University School of Medicine and completed her OB-GYN residency at St. John Hospital, both in Detroit. She is certified by the American Board of Obstetrics and Gynecology and is a Fellow of the American College of Obstetricians and Gynecologists. Dr. Johnson joined OB-GYN, P.C. in 1997 after completing her residency.
She has training in minimally invasive surgery. This includes the Davinci Robot, laparoscopic surgery, laparoscopic hysterectomy, hysteroscopic sterilization and endometrial ablation procedures.
Originally from Grand Rapids, Dr. Johnson is married and has two children. She enjoys reading, sports and spending time with her family.
Carter O. Lomax, Jr., MD, FACOG
graduated from medical school at Louisiana State University in Shreveport. He completed an OB-GYN internship and residency programs at Sinai Hospital of Detroit.
Dr. Lomax is certified by the American Board of Obstetrics and Gynecology and is a Fellow of the American College of Obstetricians and Gynecologists.
He has practiced medicine since 1985 and has advanced training in gynecological surgery, including pelviscopy, laser and hysteroscopic procedures. He also has a particular interest in infertility and ultrasound evaluations.
A native of Houston, Texas, Dr. Lomax has one daughter, and he enjoys tennis, water sports, hunting and fishing.
Brittany J. Post, WHNP-BC
is a graduate of Calvin College School of Nursing in Grand Rapids, Michigan. She completed her Masters of Science in Nursing at the University of North Carolina Chapel Hill, majoring as a Women’s Health Nurse Practitioner. Brittany holds a State of Michigan license in nursing for advanced practice and is board certified in Women’s health. She has focused on breast health maintenance, menopause, sexual health and contraception.
During free time, Brittany enjoys Zumba, swimming, camping and spending time with family and friends.
Joseph L. Riethman, MD, FACOG
graduated from medical school at The Ohio State University. He completed his OB-GYN residency and internship at the University of Virginia. Dr. Riethman is certified by the American Board of Obstetrics and Gynecology.
He has training in minimally invasive surgery. This includes the Davinci Robot, laparoscopic surgery, laparoscopic hysterectomy, hysteroscopic sterilization and endometrial ablation procedures. He is a Fellow of the American College of Obstetricians and Gynecologists. He is a member of the American Association of Gynecological Laparoscopists. He is a also a member of the American Institute of Ultrasound in Medicine.
Originally from Ohio, Dr. Riethman is married and has three children. Outside of medicine, he enjoys reading, sports and gardening.
Patricia R. Zull, CNM, FNP-BC
Certified Nurse Midwife, Family Nurse Practitioner, Licensed Professional Counselor. She received her midwifery education from Frontier School of Nurse Midwifery, Hyden, Kentucky; a master’s in nursing from Case Western Reserve; family nurse practitioner certification from Michigan State University; and a master’s in counseling from Western Michigan University.
Patti has two daughters. She enjoys playing golf, refinishing furniture and listening to “blues” music.
Jennifer K. O’Neill, DO
Received her medical degree from Rocky Vista University College of Osteopathic Medicine in Colorado. She completed her residency in OB-GYN at St. Joseph Mercy Hospital in Ann Arbor, Michigan. She has passed her written board examination and is eligible to sit for her final board examination in 2022. Dr. O’Neill is also a certified lactation counselor.
She has a special interest in perinatal health and wellbeing. She has training in minimally invasive surgery, including Davinci robot, laparoscopic, and hysteroscopic procedures.
Originally from the San Francisco Bay Area, Dr. O’Neill was recently married and loves life in the Midwest. She enjoys running, yoga, and spending time with family (and pets).