Hematology and Medical Oncology Fellowship
The SSM Health/Saint Louis University School of Medicine Hematology and Medical Oncology Fellowship Program provides comprehensive training in both inpatient and outpatient settings alongside valuable experience in teaching and research.
A Message From the Program Director
Welcome to the Hematology and Medical Oncology Fellowship Program.
We prioritize cultivating a supportive and collaborative learning environment. Our training emphasizes research-based, patient-centered care, and provides opportunities to explore all aspects of solid tumors, and malignant and nonmalignant hematologic disorders, as well as bone marrow and peripheral stem cell transplantation.
Our fellows grow in confidence and are well prepared for hematology and medical oncology board certification. The mentorship they receive prepares them for careers in academia, research or community practice.
Please don't hesitate to reach out with any questions.

Nabeel Rajeh, M.D.
Program director
Program Overview
The three-year, ACGME-accredited hematology and medical oncology fellowship offers training with a broad focus in cancers, autoimmune disorders, stem cell transplantation and bleeding disorders. Throughout the program, fellows attend education lectures and multidisiciplinary conferences.
Fellows rotate through the following sites:
- SSM Health Saint Louis University Hospital
- John J. Cochran Veterans Hospital
- SSM Health St. Mary's Hospital - St. Louis
First-year trainees gain experience with outpatient clinics and inpatient care and consultations, while second-year trainees rotate through subspecialty assignments in disciplines such as radiation oncology; immunopathology; gynecologic oncology; hemostasis laboratory; nuclear medicine; and blood banking. Additional training includes chemotherapy administration and bone marrow procedures.
Third-year trainees refine their patient care skills and focus on the research and development of clinical studies. Fellows are continually exposed to clinical research studies, and they are expected to produce scholarly activity during each academic year.
Program Highlights
- Exposure to advanced, cutting-edge treatments
- Broad faculty expertise
- Career-oriented mentorship
- Robust research opportunities
- Multidisciplinary conferences
Current Fellows

Nada Al Masalmeh, M.D.
Residency: Wayne State University School of Medicine Program
Medical school: University of Damascus Faculty of Medicine

Arslan Babar, M.D.
Residency: Cleveland Clinic Foundation Program
Medical school: Shifa College of Medicine

Mahta Salehi, M.D.
Residency: Stamford Hospital/Columbia University College of Physicians and Surgeons
Program
Medical school: Mashhad University of Medical Sciences

Sonika Prasad, M.D.
Residency: Chicago Medical School/Rosalind Franklin University of Medicine and Science
Program
Medical school: S.S. Institute of Medical Sciences and Research Centre, Davangere

Sara Sartaj, M.D.
Residency: Internal medicine, SSM Health/Saint Louis University School of Medicine
Medical school: Jawaharlal Nehru Medical College, Aligarh

Chloe Weidenbaum, D.O.
Residency: Internal medicine, University of Tennessee College of Medicine
Medical school: A.T. Still University School of Osteopathic Medicine

Dawson Foster, D.O.
Residency: St. Luke's Hospital program
Medical school: A.T. Still University Kirksville College of Osteopathic Medicine

Asad Ur Rehman, M.D.
Residency: Loyola Medicine MacNeal Hospital Program
Medical school: King Edward Medical University

Nehemias Guevara Rodriguez, M.D.
Residency: Rutgers Health/St. Barnabas Medical Center Program
Medical school: Universidad de El Salvador Facultad de Medicina
Apply
The fellowship program has three available positions each year. Applications are reviewed in mid-July.
Qualifications
- Three years of internal medicine residency training
- Board eligibility in internal medicine
The program participates in the Electronic Residency Application Service (ERAS) and the National Residency Matching Program (NRMP).
Review the Application Process
Interviews
Interviews are held virtually starting in September. They typically last from 8 a.m. to noon CST.
The program will also host one in-person visit to campus, during which candidates may tour the clinics and hospital. Attendance is optional and will not be a factor in ranking decisions.
About the SSM Health/Saint Louis University School of Medicine Graduate Medical Education Program
SSM Health proudly sponsors the Graduate Medical Education Program at Saint Louis University School of Medicine. This university-based training program offers a world-class academic environment that fosters clinical excellence, research innovation and compassionate care. All program participants are employed by SSM Health, ensuring a cohesive and supportive experience within a nationally recognized health system.