OB Hospitalist & Emergency Service  

​While your doctor may not be on-site around the clock, our board-certified OB Hospitalists are. OB Hospitalists specialize exclusively in the care of women during labor and delivery in the Childbirth Center. OB Hospitalists assist your regular physician in the event of an emergency and if your regular doctor is unavailable when you go into labor. They also care for delivering mothers who do not have their own doctor. 

The Obstetrical Emergency Department/Triage Unit and Hospitalist Service, located within the Childbirth Center, is a satellite of PeaceHealth St. Joseph Medical Center's Haggen Family Emergency and Trauma Center. This program enhances the continuity of care for pregnant women, new mothers and their infants, while supporting our vision of improved safety and clinical outcomes in our obstetrical unit.

Meet Our Hospitalists

Douglas Madsen, MD

Douglas Madsen, MD, has been in private practice in Bellingham since 2002. Prior to that, he practiced for 17 years at the Mount Vernon Women’s Clinic. Dr. Madsen received his medical degree from the University of Washington and completed his internship and residency at the University of New Mexico, finishing in 1985. He is board-certified in Obstetrics and Gynecology. Dr. Madsen and his wife, Yvonne, live in Bellingham and have two grown children.​​

Cheryl Marier, MD​​

Cheryl Marier, MD, brings over 30 years of obstetrical and gynecological experience to our community. After receiving her medical degree from the University of Colorado School of Medicine in 1980, she completed a four year residency in obstetrics and gynecology at St. Joseph Hospital in Denver, Colorado. She is certified by the American Board of Obstetrics and Gynecology. Dr. Marier is happily married and has two daughters.


​Robert Olson, MD​

Prior to joining PeaceHealth in 2009, Robert Olson, MD, spent three years at Sacred Heart Hospital in Spokane, Washington. Before that he held a private practice in Bellingham for 28 years. Dr. Olson received his medical degree from the College of Medicine and Dentistry at Rutger’s Medical School in 1974. He has been a member of both the Washington State Medical Society, and the Whatcom County Medical Society since 1980. Dr. Olson is married and has three daughters. He is an avid reader, enjoys playing golf and is a gourmet cook.​


Mary Lucie Riederer, MD​

Mary Riederer, MD, moved to Bellingham from Oak Harbor, Washington, with 36 years of experience. Dr. Riederer graduated from the University of Kansas with her medical degree in 1974. She practiced in several California clinics prior to her move to Washington state in 1990. Since then, Riederer has practiced at Whidbey Women’s Health on Whidbey Island, and at the Naval Hospital in Oak Harbor. She is certified by the American Board of Obstetrics & Gynecology and a Fellow of the American College of Obstetricians & Gynecologists.​