
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.

Anand Kadakia, MD
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Dr. Anand Kadakia joined the Division of Hospital Medicine as an Instructor in Medicine in July 2024. He completed his medical education at the Government Medical College of Baroda in India. Dr. Kadakia actively engaged in community service initiatives, particularly focusing on assisting patients with sickle cell disease. He conducted research at the University of Maryland School of Medicine, investigating the role of NAD in diabetic neuropathy. Dr. Kadakia completed his Internal Medicine residency at Jersey Shore University Medical Center in New Jersey, where he prioritized serving underserved populations and leading quality improvement projects.

Lalit Kalvala, MD
Assistant Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Lalit Kalvala, MD, is an Assistant Professor of Medicine in the Division of Hospital Medicine. He primarily works on general medicine floors and occasionally on oncology and bone marrow transplant floors. He contributes to the recruitment of hospitalists by serving as a member of the Hospitalist Recruitment Committee. Additionally, he is dedicated to patient safety and quality improvement, participating as a member of the Patient Safety & Quality Improvement Committee.

Ankita Kapoor, MD, MBBS
Assistant Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Ankita Kapoor, MD, MBBS, joined the Division of Hospital Medicine as an Assistant Professor of Medicine in October 2022. She provides direct care to patients admitted on the Hospitalist Service at BJH as well as BJWCH. She serves as the Director of the Advanced Practice Clinician (APC) Workforce Development, in the Division of Hospital Medicine. She enjoys teaching residents and medical students along with the PA students. She has assisted with curating an APC educational Curriculum and a robust APC evaluation process. She is also the Director of the Hospital Medicine Fellowship Program for APCs at BJH. Dr. Kapoor serves on several committees within the Division, such as Physician and APC Recruitment, Quality Improvement & Patient Safety as well as Orientation. She is also involved in the WashU Gateway Medical Conference Task Force. She also aids in interviewing and recruiting medical students for the IM Residency Program. Her current areas of interest are general internal medicine, particularly hospital medicine and inpatient services.

Gizem Kaya, MD
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Dr. Kaya joined the Division of Hospital Medicine as an Instructor in Medicine in July 2024. She was accepted to one of the top third medical schools in Turkey after being part of the 0.1 percentile of students in the national exam of Turkey. During medical school, she participated in multiple community service projects with the Rotary International Organization in Turkey, including blood donation projects to raise awareness and mental/mood supporting projects for children in Pediatric Hematology and Oncology hospitals. After completing medical school, she started to work as a research fellow in Cleveland Clinic Digestive Disease and Surgery Institute in Cleveland, Ohio, by 2020. She participated in multiple research projects during her time at the Cleveland Clinic about inflammatory bowel diseases and advanced endoscopic procedures, including endoscopic mucosal resection and endoscopic submucosal dissection. She completed her Internal Medicine training at the University of Pittsburgh Medical Center in Central Pennsylvania prior to joining the division.

Martin Kerrigan, MD
Associate Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Martin Kerrigan, MD, is an Associate Professor of Medicine and serves as a Co-Director of the Internal Medicine Service in the Division of Hospital Medicine. Dr. Kerrigan also serves as the Internal Medicine Associate Clerkship Director for the School of Medicine and works as a Physician Utilization Management Advisor for Barnes-Jewish Hospital. His clinical interests include medical consultation, medical student education, curriculum development, and providing high value clinical care. He attends on the inpatient general medicine teaching service (Firm), on the medicine consult service, and on the hospitalist direct care service.

Ali Khan, MD
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Dr. Ali Ayub Khan joined the Division of Hospital Medicine as an Instructor in Medicine in July 2024. He grew up in Oklahoma City, Oklahoma, before attending the University of Oklahoma for undergraduate studies. He graduated magna cum laude with a bachelor’s degree in biochemistry with a minor in Spanish while also completing the Interdisciplinary Honors Program. He dedicated much of his time during undergrad to the service of his community, specifically the underserved and uninsured Hispanic populations, through volunteer work at free medical clinics. He continued his studies at the University of Oklahoma and obtained a master’s degree in science in the field of prevention sciences and addiction. He went on to receive his medical degree from the University of Oklahoma—Tulsa School of Community Medicine. Dr. Khan then completed his internship and residency training in Internal Medicine at the Saint Louis University School of Medicine in St. Louis, Missouri. His training at this large university center and safety net hospital further reinforced the importance of socioeconomic factors on population health and health disparities.

Hazera Khatun, MD
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Dr. Hazera Khatun joined the Division of Hospital Medicine as an Instructor in Medicine in July 2024. She earned her MBBS degree from Dhaka Medical College in Bangladesh and completed her hematology training, receiving a fellowship from BCPS. Dr. Khatun has published multiple articles in clinical research on hematology. She obtained an MSc in Biomedical Sciences from King’s College London, UK, as a Commonwealth Scholar. In the USA, she completed her residency in Internal Medicine and has been practicing as a full-time hospitalist since 2019. Dr. Khatun also has a keen interest in clinical education and briefly taught as a Clinical Assistant Professor at the Warren Alpert School of Medicine.

Daniel Kichura, MD
Assistant Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Daniel Kichura, MD is an Assistant Professor of Medicine in the Division of Hospital Medicine. He is the Director of Malignant Hematology (Bone Marrow Transplant) Hospitalists and co-chair of the Hospitalist BMT/Oncology Committee. He attends on the Malignant Hematology and Medical Oncology services, and as a teaching attending for the Internal Medicine residency program (Firm). He also serves on the Patient Care Operations, Quality Improvement and Patient Safety, and Recruitment committees and the Oncology Fall Response Group. He is interested the care of hospitalized malignant hematology patients, patient safety and quality improvement, teaching medical students and residents, and mentoring new hospitalists.

Yamuna Kondapally, MD
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Yamuna Reddy Kondapally, MD, is an Instructor in Medicine in the Division of Hospital Medicine. Prior to joining the division, Dr. Kondapally worked as a primary care physician in a rural community in Hemet, California. She received her medical degree from Osmania Medical College, India and residency in Internal Medicine from Saint Peters University Hospital/Rutgers Robert Wood Johnson medical school. She has a special interest in Hematology/Oncology. Currently working as an attending physician on oncology hospitalist service.

Danielle Kubicki, MD
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Danielle Kubicki, MD, is an Instructor in Medicine in the Division of Hospital Medicine. She received her medical degree at Vanderbilt University and trained in internal medicine at Washington University in St. Louis/BJH, where she completed the BJH/WashU Primary Care in Internal Medicine program. She has furthered her medical education through contributions to the national Society of General Internal Medicine and the Human Diagnosis Project. She enjoys teaching residents and medical students on the Hospitalist service. As a graduate of the Primary Care in Internal Medicine program, she has a particular interest in helping patients transition seamlessly from the hospital to the outpatient setting.

Amrat Kumar, MD
Instructor in Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Dr. Amrat Kumar joined the Division of Hospital Medicine as an Instructor in Medicine in July 2024. He grew up in Diplo, Pakistan, and received medical education at Sindh Medical College, Karachi, Pakistan. He then spent a few years working as a medical officer near his hometown before moving to the USA for his internal medicine residency at Bassett Medical Center in Cooperstown, NY. After graduation from his residency training in June 2020, Dr. Kumar joined Bassett Medical Center as an attending physician in the hospitalist division, where he had the opportunity to teach medical students and residents. He recently also had the opportunity to present grand rounds on “approach to acute thrombocytopenia in hospitalized patients.” Before his residency, he worked as a visiting scientist and research assistant in the Laboratory of Diabetes and Diabetes-Related Disorders at the Feinstein Institute for Medical Research for close to a year and studied the effects of metformin, metabolic syndrome, obesity, and the obesity paradox.

Alex Lane, MD
Assistant Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Alex Lane, MD, is an Assistant Professor of Medicine and Fellow of the American College of Physicians. He has interests in medical education of residents, high value care and quality improvement, and inpatient treatment of opiate use disorder. Dr. Lane serves as Co-Director for Intern Education for the Division of Hospitalist Medicine. He attends as a general hospitalist as well as the general medicine inpatient teaching service (FIRM.) He serves on the BJH Glycemic Management Committee and the DHM Education committee, and he has published recent literature using mindful lab ordering to reduce inpatient lab draws.

Gina LaRossa, MD
Associate Professor of Medicine
- Phone: 314-362-1700
- Fax: 314-362-9878
Gina LaRossa, MD, is an Associate Professor of Medicine in the Division of Hospital Medicine. She serves as medical director for the 3500 Observation Unit, director of the ED Hospitalist program, co-director of the Medicine Consult service and as key clinical faculty for the Internal Medicine Residency Program. Gina has interests in clinical operations, medical education and quality improvement. She attends frequently on the inpatient medicine teaching service and medicine consult service, as well as caring for patients directly on the hospitalist service.