Mark V. Williams, MD, FACP, MHM
Division Chief, Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Mark V. Williams, MD, FACP, MHM began his collaboration with the Division’s experienced leadership team in October 2021 to build one of the premier academic divisions in the nation. A Past-President of the Society of Hospital Medicine, Founding Editor of the Journal of Hospital Medicine and one of the first 10 Masters in Hospital Medicine, Mark brings his expertise in quality improvement, teamwork, and care transitions to this prestigious institution and talented group.
Maun Baral, MD
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Maun R Baral, MD, joined the Division of Hospital Medicine as an Instructor in Medicine after recently completing his Internal Medicine Residency in 2023. Currently, his primary responsibility involves caring for acutely ill patients admitted to the oncology and general medicine floors. He finds great satisfaction in the complexities and nuances of hospital medicine, with a particular passion for point-of-care ultrasound (POCUS), high value care, and medical education. Additionally, he takes special interest in expanding his knowledge and role in the oncology and Bone marrow transplant department.
Rachel Bardowell, MD, FACP
Associate Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Rachel Bardowell, MD, FACP is an Associate Professor of Medicine in the Division of Hospital Medicine and Associate Chief Medical Officer for Barnes Jewish Hospital. She serves the division as Vice Chief of Safety and Quality and is Co-Chair of the BJH Patient Safety and Quality Council. Clinical Activities include a mix of Hospitalist Direct Care, General Medicine inpatient teaching service (Firm Medicine), and Bedside Procedure Team. For the Internal Medicine residency program, she is a member of the Key Clinical Faculty. Areas of interest include patient safety and quality improvement, Point of Care Ultrasound (POCUS), and patient flow.
Erin Baum, MD
Assistant Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Erin Baum, MD, is an Assistant Professor of Medicine in the Division of Hospital Medicine. She serves as the attending physician for the general medicine inpatient teaching services as well as the hospitalist direct care services, including day and night care of admitted patients. She serves on the division’s patient care operations and education committees and is also the faculty advisor to the WUSM Internal Medicine Interest Group. Dr. Baum enjoys teaching and mentoring medical students and residents as well as the opportunity to be involved in student and resident recruitment. Her other areas of interest include medication reconciliation accuracy improvement and night float curriculum development.
Kimberly Boyer, DNP, APRN
Nurse Practitioner
- Phone: 314-362-1700
- Fax: 314-362-9878
Kim Boyer, DNP, APRN is a dual certified Adult Gerontology Acute Care and Family Nurse Practitioner with the Division of Hospital Medicine at Washington University St. Louis School of Medicine. Her duties are split as a provider within Barnes-Jewish Hospital/WUSM and with Goldfarb School of Nursing where she is an instructor in the AGACNP/DNP program. She is passionate about global health and addressing health care disparities stateside as well as in developing countries, partnering with organizations in Central America and Africa to provide free medical care to their citizens. She also holds a position with the US Department of Health and Human Services on a Disaster Medical Assistance Team (DMAT) deploying to areas impacted by disruptions to usual healthcare operations, most recently serving in Florida during Hurricane Ian.
Matt Brinkmeier, MD
Assistant Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Matthew Brinkmeier, MD, is an Assistant Professor of Medicine in the Division of Hospital Medicine. He attends on the internal medicine inpatient teaching service (FIRM medicine), the bedside Procedure Team, the Medicine Consult service, and provides consultation at The Rehab Institute of Saint Louis in addition to providing direct care on our Hospital Medicine Service. His clinical interests include medical education, point of care ultrasonography, and optimization/customization of the electronic medical record system. Dr. Brinkmeier chairs on the Formulary Subcommittee of the Barnes-Jewish Hospital Pharmacy and Therapeutics Committee and is active in the Division’s Epic EMR Task Force. He previously served as the Secretary for the Saint Louis chapter of the Society of Hospital Medicine.
Natalia Brito Rivera, MD, MPHS
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Natalia Brito Rivera, MD, MPHS, is an Instructor in Medicine in the Division of Hospital Medicine. She works as a hospitalist primarily on the internal medicine service and medical oncology service providing direct patient care and teaching medical students and residents in a clinical setting. She has an interest in medical education and student mentoring and aids in the recruitment of internal medicine candidates as an interviewer. She serves in the Medical Education Committee and the Inclusion, Diversity, Equity, Allyship and Social Justice (IDEAS) Committee.
Cynthia Brown, NP
Nurse Practitioner
- Phone: 314-362-1700
- Fax: 314-362-9878
Cynthia Brown DNP, FNP-BC, is a Nurse Practitioner with the Division of Hospital Medicine at Washington University St. Louis School of Medicine. She works primarily at The Rehabilitation Institute of St. Louis (TRISL) providing Internal Medicine consults for the Washington University St. Louis Physical Medicine & Rehabilitation teams with goals of improving medical care, preventing errors, addressing acute medical issues and preventing Acute Care Transfers.
Monique Bruinsma, MD
Assistant Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Monique Bruinsma, MD, is an Assistant Professor of Medicine in the Division of Hospital Medicine. She received her medical degree, masters in immunology, and residency training at Washington University/BJH. In her clinical endeavors, she cares for acutely ill hospitalized medicine patients. She has an interest in using information technology to improve the efficiency and safety of patient care. She also fosters the development of physician trainees by providing didactic teaching as well as attending frequently on the general medicine teaching service.
C.J. Butler, PA-C, ATC
Physician Assistant
- Phone: 314-362-1700
- Fax: 314-362-9878
C.J. Butler, PA-C, ATC is a Physician Assistant within the Division of Hospital Medicine at Washington University. C.J. began his career as a high school athletic trainer working with the athletes of Collinsville High School for three years after receiving his Master of Athletic Training from Saint Louis University. Ultimately, C.J. went back to SLU and received his Physician Assistant, Master of Medical Science degree in 2023. C.J. is committed to providing comprehensive patient-centered care and developing plans specific for each individual person.
Dennis Chang, MD
Associate Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Dennis Chang, MD, is an Associate Professor in the Division of Hospital Medicine and the Interprofessional Education (IPE) MD Thread Director, and Co-Director of the Inpatient Clinical Immersion at Washington University in St. Louis. He was previously affiliated with the Icahn School of Medicine at Mount Sinai in New York City where he served as the 3rd year Medicine Clerkship Director and the Director of Education and Faculty Development for the Division of Hospital Medicine.
He received his BS from Yale University, his MD from the University of Chicago Pritzker School of Medicine and completed his Internal Medicine residency at NYU.
Miguel A Chavez, MD, MSc
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Miguel A. Chavez, MD, MSc is an Instructor in Medicine in the Division of Hospital Medicine and works primarily on the bone marrow transplant service as a hospitalist. He is trained in Infectious Diseases and has an interest in infections in immunocompromised patients and antimicrobial stewardship. He has implemented guidelines for antimicrobial and diagnostic stewardship within the bone marrow transplant services. Dr. Chavez has contributed to multiple clinical research publications within the realm of infectious diseases. He participates with the Hospital Epidemiology and Infection Prevention Committee as well as the Antimicrobial Stewardship Program from Barnes Jewish Hospital. He also has an interest in medical education and is the educational coordinator for the infectious diseases’ curriculum of the internal medicine residency program.
Jeffrey Choi, MD, MS
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Jeffrey Choi, MD, is an Instructor in Medicine in the Division of Hospital Medicine. He received his medical degree and completed his internal medicine residency training at Washington University in St. Louis/Barnes-Jewish Hospital. He is interested in general inpatient care with a focus on safe transitional care and health literacy and provides direct clinical care in various settings including general day and night hospitalist medicine, oncology, and BMT. He enjoys working with medical student and resident trainees in his clinical practice and plans to become more involved in general medical education within the department. He is also interested in clinical operations and serves on the patient care operations committee.
Kelsey Chow, MD
Assistant Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Kelsey Chow, MD, is an Assistant Professor of Medicine in the Division of Hospital Medicine. She has been a member of the Orientation Committee for the past two years to help design orientation materials and presentations to help incoming hospitalists become familiar with the Division of Hospital Medicine and Wash U. She also has an interest in reducing hospital readmissions, and has contributed to decreasing hospitalizations during her time as a hospitalist at Rush by writing action plans for patients frequently admitted to the hospital. She is also currently on the Readmission Committee at BJH. She also enjoys teaching both medical students and residents while on the Hospitalist service as well as Firm service at BJH.