People

Ali Abdelhay, MD, joined the Division of Hospital Medicine in the Department of Internal Medicine at Washington University School of Medicine as an Instructor in July 2025. Originally from Jordan, he earned his medical degree from the University of Jordan Faculty of Medicine in 2019. He later completed his internal medicine residency at Rochester General Hospital, where he also served as Chief Medical Resident. Prior to residency, Dr. Abdelhay gained clinical experience as a medicine intern at Shmaisani Hospital and as a resident at the King Hussein Cancer Center in Amman, Jordan, where he cared for patients with complex oncologic and hematologic conditions. During his training, he developed a strong interest in hematology, clinical epidemiology, and patient-centered inpatient care. He is passionate about improving patient outcomes through both bedside teaching and rigorous clinical research.

Dr. Timothy Ackerman joined the Division of Hospital Medicine at Washington University in July 2024 as an Instructor in Medicine. He graduated magna cum laude with departmental honors from Rutgers University in 2008 with a Bachelor of Arts in Cellular Biology and Neuroscience. Prior to pursuing medicine, he worked in the medical diagnostics industry, focusing on the development of rapid in vitro diagnostic kits for infectious diseases. After enrolling in the study of medicine at St. George’s University, he graduated in 2017. Following his residency, Dr. Ackerman joined the faculty at Louisiana State University Health Shreveport School of Medicine as a Clinical Instructor in the Department of Medicine’s Division of Internal Medicine-Pediatrics. He served as the Associate Program Director of the Internal Medicine-Pediatrics Residency Program, leading the Clinical Competency Committee. Additionally, Dr. Ackerman is part of the Division of Pediatric Hospital Medicine in the Department of Pediatrics.

Dr. Arjab Adhikari joined the Division of Hospital Medicine as an Instructor in Medicine in July 2024. He was born and raised in Kathmandu, the capital city of Nepal. He did his medical schooling at KIST Medical College in Nepal. Following his graduation, Dr. Adhikari pursued residency training at Ascension Saint Francis Hospital in Evanston, Illinois, where he distinguished himself by earning two academic excellence awards and the prestigious Walter Bissell Award in 2023 for his outstanding contributions to hematology/oncology and cancer patient care. Prior to his current appointment as a Clinical Instructor, Dr. Adhikari served as a PGY-4 Chief Resident. Additionally, he served as a Clinical Instructor at Rosalind Franklin University Medical School.

Amanda Airaghi, PA-C, is a Physician Assistant Fellow in the Division of Hospital Medicine at WashU Medicine. Amanda completed her Master of Science in Physician Assistant Studies at Mississippi State University in May of 2025. She holds a Bachelor of Science in Exercise Sciences with a minor in Biological Sciences from Southern Illinois University Edwardsville. Amanda has extensive experience in healthcare, having worked as a patient care technician at Barnes Jewish Hospital and as an emergency department medical scribe across multiple facilities. She is certified in BLS, ACLS, PALS, OSHA standards, IHI, CITI, and oral health. Active in professional organizations such as the American Academy of Physician Assistants and the Mississippi Academy of Physician Assistants, Amanda also served as the treasurer for her PA program’s class of 2025. Her volunteer work includes contributions to the St. Patrick Center and Amazing Grace Women’s Shelter, reflecting her dedication to community service.

Yazan Al Jabiri, MD, is an Instructor in Medicine in the Division of Hospital Medicine. He obtained his medical degree from Jordan University of Science and Technology and completed his internal medicine residency at NYC Health and Hospitals/ Lincoln. Dr. Al Jabiri is highly interested in research with focus on Meta-analysis/Systematic reviews. Currently he has several active projects in gastroenterology and hepatology mainly in non-alcoholic steatohepatitis treatment and inflammatory bowel disease. He also has an interest in epidemiology and using large data bases for outcome research to reveal opportunities for possible interventions to improve the care and clinical outcomes of patients.

Adnan Al Najada, MD, began his position as an Instructor in Medicine at WashU Medicine in St. Louis in July 2025, where he works as a hospitalist. This role marks an important milestone in his career, following the completion of his internal medicine residency at Unity Hospital in Rochester, New York. Originally from Jordan, Al Najada earned his medical degree from the University of Jordan before moving to the United States to continue his medical training.

For his future goals, Al Najada is committed to advancing his knowledge and expertise as an internist with particular interest in nephrology, infectious disease, and cardiology. Driven by his passion for teaching, he chose WashU as the ideal place to pursue his goals, aligning with his values in academic medicine and patient care.

Mohammad Aldiabat, MD, is an Instructor in Medicine in the Department of Medicine, Division of Hospital Medicine. He obtained his medical degree from Jordan University of Science and Technology and completed his residency in internal medicine at NYC Health and Hospitals/Lincoln. Dr. Adiabat’s focus on geriatric inpatient care led him to pursue a Geriatrics Medicine Fellowship at NYU Langone, where he provided compassionate care to elderly patients hospitalized with various geriatric syndromes.

Currently, he is pursuing a master’s degree in epidemiology and biostatistics at Harvard School of Public Health, with research interests centered around gastroenterology and inflammatory bowel disease epidemiology and outcomes research in the elderly population.

Dr. Aldiabat’s primary goal is to investigate the epidemiology of gastroenterology and inflammatory bowel disease in the elderly population, with the ultimate aim of advancing their care and enhancing their quality of life.

Dr. Saleh Yazeed Salah Alhalaseh, MD, joined the Division of Hospital Medicine as an Instructor in Medicine in June 2024. Originally from Jordan, Dr. Alhalaseh graduated from Mu’tah University, Faculty of Medicine, Jordan, where he earned his medical degree in 2019. Dr. Alhalaseh completed his residency at St. Barnabas Hospital in the Bronx, where he developed a passion for working with underserved populations. Throughout his training, he actively engaged in various projects, such as quality improvement projects focused on enhancing patient care outcomes, including initiatives related to syncope and orthostatic vital signs, as well as glycemic control in critically ill patients. In his role as an Instructor in Medicine, Dr. Alhalaseh is committed to shaping future healthcare professionals. He employs innovative teaching methods, fostering a supportive environment for student learning and skill development.

Florence Michelle Almiron-Torralba, MD, is an Instructor in Medicine in the Division of Hospital Medicine. She works primarily on the Progressive Pulmonary Care Unit (PPCU), hospital medicine, and bone marrow transplant service as a hospitalist. She provides direct patient care on these services. She has interests in teaching and mentorship of medical students and residents on their clinical rotation on the Progressive Pulmonary Care Unit, hospitalist and bone marrow transplant service.

Dr. Andrew Alter joined the Division of Hospital Medicine as an Instructor in Medicine in June 2024. Dr. Alter was born and raised in Houston, Texas, and he lived there until he went to college. He completed his undergraduate degree double majoring in biology and political science at Emory University in Atlanta, Georgia, where he was inducted into the Phi Beta Kappa honor society. He then moved back to Houston to complete medical school at Baylor College of Medicine. He earned the Distinction in Foundational Sciences and Student Senate Mentorship Award while at Baylor. He graduated medical school in May 2021, and then he moved to St. Louis with his wife to complete his residency in internal medicine at Barnes-Jewish Hospital/Washington University in St. Louis. During his time in medical school and residency, Dr. Alter worked as a tutor for pre-clinical and clinical medical students. Dr. Alter loves working at Barnes Hospital, where he can continue to learn with medical students, residents, fellows, and other faculty.

Dr. Sheun Aluko, MD, currently serves as an Instructor in Medicine for the Division of Hospital Medicine. Dr. Aluko completed a degree in biomedical engineering at Washington University and then completed medical school at Stanford University School of Medicine. He continued to hone his engineering skills by completing a master’s in biomedical informatics while at Stanford, with the goal of fusing his medical and computer science knowledge to develop innovative healthcare software solutions for patients and providers. Dr. Aluko then completed a medicine residency at Washington University in St. Louis/Barnes Jewish Hospital, after which he continued as an instructor of medicine. Throughout his internal medicine practice, Dr. Aluko has demonstrated exceptional skill in diagnosing and treating a wide range of conditions, emphasizing a holistic approach to patient care. His expertise spans managing chronic illnesses, addressing multisystem disease conditions, and promoting health and wellness to prevent disease. Dr. Aluko’s practice is rooted in a thorough understanding of internal medicine’s broad scope, from primary care to the intricacies of various subspecialties.

Sayel Alzraikat, MD, joined the Division of Hospital Medicine in the Department of Medicine as an Instructor in July 2025. Born and raised in Amman, Jordan, he earned his medical degree from the University of Jordan, where he developed a strong interest in clinical practice and research. Alzraikat completed his residency at MedStar Georgetown University – Washington Hospital Center in 2025. Throughout his training, he engaged in research, primarily in Gastroenterology, while also being deeply involved in teaching medical students and junior residents. His current focus is on inpatient care, with a particular interest in Gastroenterology. Additionally, he is eager to continue teaching and mentoring medical students and residents, further fostering his passion for medical education and contributing to the growth of future physicians.

Crystal Atwood, MD, is an Associate Professor of Medicine in the Division of Hospital Medicine at Washington University School of Medicine. With extensive experience across multiple clinical service lines within the Division of Hospital Medicine, Dr. Atwood is recognized for her expertise in managing complex inpatient care. She has been actively involved in numerous initiatives aimed at enhancing care transitions, patient throughput, and diagnostic testing processes. In addition to clinical duties, Dr. Atwood is the Director of Point-of-Care Ultrasound (POCUS) for the Division of Hospital Medicine and serves as Core Faculty for the Internal Medicine Residency Program. Her commitment to education is reflected in her leadership roles in the POCUS credentialing program for hospitalists and the creation of a POCUS elective for residents. She is also actively involved in leadership roles within the Society of Hospital Medicine (SHM), having served as President, Treasurer, and Secretary of the Saint Louis Chapter for the past 8 years.

Dr. Tarek Bakain joined the Division of Hospital Medicine as an Instructor in Medicine in July 2024. He was born and raised in Amman, Jordan, and pursued his medical degree at the Jordan University of Science and Technology, graduating with university honors in 2018. His passion for medicine extended beyond academics; during his medical school years, he was actively involved with the International Federation of Medical Students Associations (IFMSA), organizing numerous campaigns and events aimed at improving health care for underserved populations and refugees in Jordan. Dr. Bakain completed his residency in Internal Medicine at MedStar Georgetown University-Washington Hospital Center in 2024 before joining the Division of Hospital Medicine. Throughout his residency, Dr. Bakain engaged in several quality improvement projects and research within the hospital medicine and gastroenterology fields and was able to provide care to a variety of populations and age groups while keeping up his passion for helping underserved communities. He enjoys teaching and working with both medical students and residents. Dr. Bakain is particularly interested in general internal medicine, focusing on inpatient care, with a keen interest in gastroenterology.