Family Medicine Residency
LEADERSHIP
Program Director
Katie Johnson, DO serves as the Internal Medicine Residency Program Director of the Internal Medicine Residency at the R. Randall Rollins Center for Medical Education at Beebe Healthcare. As Beebe prepares to welcome the inaugural class of Internal Medicine residents in July 2027, Dr. Johnson is leading the development of the program’s curriculum, educational framework, and clinical training experience. She is actively involved in graduate medical education initiatives across the organization and serves on numerous educational committees dedicated to advancing physician training and professional development.
In addition to her role in medical education, Dr. Johnson serves as the Medical Director for of the Palliative Care department at Beebe Healthcare. She is dedicated to providing comprehensive, patient-centered care for individuals facing serious and chronic illnesses.
Dr. Johnson earned her Doctor of Osteopathic Medicine degree from the Philadelphia College of Osteopathic Medicine and completed her Internal Medicine residency training at Methodist Dallas Medical Center. She is board certified in Internal Medicine and has built a career that combines exceptional clinical care with a passion for education and mentorship.
Since joining Beebe Healthcare’s hospitalist group in 2017, Dr. Johnson has played a pivotal role in expanding clinical and educational programs across the organization. In 2018, she became the founding Medical Director of the Palliative Care department, leading the development and growth of the specialty across the care continuum. Her passion for teaching was reignited when Beebe’s Family Medicine Residency launched in 2023, and residents began rotating with the Palliative Care team. Recognizing her commitment to learner development, she was appointed Program Director of Undergraduate Medical Education, overseeing medical student rotations and educational experiences throughout the healthcare system. In 2025, she transitioned into her current role as the Internal Medicine Residency Program Director of the Internal Medicine Residency, where she continues to shape the future of resident physician education at Beebe Healthcare.
Prior to joining Beebe Healthcare, Dr. Johnson served as a faculty member at Texas A&M College of Medicine at Baylor University Medical Center in Dallas, further strengthening her commitment to academic medicine and resident physician education.
Outside of her professional responsibilities, Dr. Johnson enjoys spending time at the Delaware beaches, cooking, and staying active through sports either as a participant, coach, or enthusiastic fan. She values teamwork and community engagement, principles that continue to guide both her personal and professional life.
Associate Program Director
Marisa Conti, DO is a highly respected physician leader, educator, and advocate for graduate medical education with extensive experience in Internal Medicine and a longstanding commitment to developing the next generation of physicians. Throughout her career, she has combined clinical excellence with a passion for teaching, mentorship, and curriculum development, helping resident physicians grow into skilled, compassionate, and patient-centered physicians.
At Beebe Healthcare's R. Randall Rollins Center for Medical Education, Dr. Conti serves as the Founding Program Director of the Transitional Year Residency and Associate Program Director of the Internal Medicine Residency. In these leadership roles, she has been instrumental in establishing and advancing Beebe's graduate medical education initiatives. As the founding leader of the Transitional Year Program, she guided the development, accreditation, and implementation of the program, creating a supportive educational environment that emphasizes clinical excellence, professionalism, wellness, and lifelong learning. She now collaborates closely with Internal Medicine residency leadership to develop curriculum, mentor residents and faculty, and enhance educational experiences as Beebe continues to expand its physician training programs.
Dr. Conti earned her Doctor of Osteopathic Medicine degree from the University of Medicine and Dentistry of New Jersey School of Osteopathic Medicine (now Rowan-Virtua School of Osteopathic Medicine). She completed her residency training at Kennedy Memorial Hospital (now Jefferson Health New Jersey) and is board certified in Internal Medicine. She is also a Fellow of the American College of Osteopathic Internists (ACOI), reflecting her dedication to professional excellence and continued advancement within her field.
Clinically, Dr. Conti has extensive experience caring for adult patients, with particular expertise in the management of the aging population in the outpatient setting. Her patient-centered approach focuses on helping individuals maintain health, function, and quality of life through comprehensive and compassionate medical care.
A dedicated educator, Dr. Conti is actively involved in resident physician and faculty development through grand rounds presentations, resident didactic lectures, and faculty development initiatives. She plays a key role in both institution-wide and program-specific wellness curricula and contributes to leadership development programs designed to prepare trainees for successful and fulfilling careers in medicine. Known for her collaborative leadership style, she is committed to fostering supportive learning environments where residents can develop the clinical skills, confidence, and professionalism needed to thrive in today's healthcare landscape.
Dr. Conti finds tremendous fulfillment in graduate medical education and is passionate about witnessing the transformation of learners throughout their training journey. Seeing resident physicians grow exponentially in their knowledge, skills, and confidence, and ultimately become educators and mentors themselves, is one of the most rewarding aspects of her career.
Outside of medicine, Dr. Conti enjoys reading, knitting and other fiber arts, and traveling. Her appreciation for lifelong learning, creativity, and exploration reflects the same curiosity and dedication that she brings to medical education and patient care.
Program Administrator II
With more than 20 years of healthcare experience spanning medical education, clinical operations, leadership, and process improvement, he plays a key role in supporting the development and administration of residency and medical student training programs.
In his current role, Doug oversees the daily operations of residency programs, ensuring compliance with the Accreditation Council for Graduate Medical Education (ACGME). He collaborates closely with physicians, residents, medical students, faculty, and institutional leaders to coordinate educational activities, manage accreditation requirements, support recruitment and onboarding efforts, and facilitate program initiatives that enhance the learner experience.
Prior to joining Beebe Healthcare, Doug served as a Continuous Improvement Specialist with Cleveland Clinic, where he led performance improvement projects using Lean methodology and data-driven analysis. Earlier in his career at Penn State Health, he held progressively advancing leadership positions, including Process Improvement Analyst, Medical Office Supervisor, and Residency Program Coordinator for the Department of Anesthesia, managing residency programs, leading healthcare teams, and supporting strategic operational initiatives.
Doug holds a Bachelor of Science in Organizational Leadership from Penn State University and earned his Human Resources Associate Professional Certification in 2023. His unique combination of healthcare operations expertise, Lean process improvement experience, and graduate medical education leadership allows him to bridge clinical, academic, and administrative functions to support the successful training of future physicians. He is passionate about fostering high-quality learning environments, building collaborative relationships, and advancing medical education through innovation, efficiency, and continuous improvement.
His appreciation for connection, community, and lifelong learning extends well beyond the workplace. Outside of his professional responsibilities, Doug enjoys exploring the vibrant local restaurant scene, embracing Delaware's coastal lifestyle, and engaging with friends and community members throughout the local LGBTQIA+ community.
FACULTY
Core Faculty
Andrew J. Foy, MD is an internationally recognized general cardiologist, health services researcher, and medical educator who currently practices at the Beebe Healthcare Cardiovascular Institute in Lewes, Delaware. Throughout his distinguished career, he has built a reputation for bridging clinical research, academic scholarship, and evidence-based patient care. His work focuses on applying rigorous scientific evaluation to improve decision-making in medicine while ensuring patients receive high-quality, patient-centered care.
In addition to his clinical practice, Dr. Foy serves as a Core Faculty member for the Internal Medicine Residency Program at the R. Randall Rollins Center for Medical Education. In this role, he contributes to program and curriculum development, participates in resident physician education, and supports a wide range of graduate medical education initiatives and departmental activities. A passionate educator, Dr. Foy has mentored medical students, resident physicians, and cardiology fellows throughout his career. He is particularly known for teaching critical appraisal skills, encouraging trainees to thoughtfully evaluate medical literature and evidence rather than relying solely on traditional clinical practices.
Dr. Foy's commitment to medical education has been recognized nationally. In 2022, he received Penn State's Scholarship in Education Award for his contributions to curriculum design and educational innovation. His academic influence extends beyond the classroom through service on the editorial boards of international cardiovascular journals, where he helps shape scholarly discourse within the field of cardiology.
Dr. Foy completed his medical degree at Sidney Kimmel Medical College at Thomas Jefferson University before pursuing an Internal Medicine residency at Thomas Jefferson University Hospital. He then completed a Cardiology Fellowship at Penn State Milton S. Hershey Medical Center, where his academic promise was recognized with the Department of Medicine's Annual Award for Excellence in Research as a Fellow.
Before relocating to coastal Delaware, Dr. Foy spent more than a decade as faculty at the Penn State College of Medicine, serving as an Associate Professor of Medicine and Public Health Sciences from 2011 to 2024. During this time, he was honored as the Robert F. Zelis Junior Faculty Research Scholar and established himself as a leading investigator in health services research. With more than 100 peer-reviewed publications, his research has focused on comparative effectiveness, health psychology, and strategies to improve healthcare value and patient outcomes.
His scholarly work has explored several key areas, including the evaluation of cardiac stress testing and imaging, optimization of care for patients presenting with low-risk chest pain, and the reduction of unnecessary medical interventions. Dr. Foy has also conducted extensive critical analyses of major cardiovascular clinical trials to better understand how research findings translate to real-world patients with complex medical conditions. His research excellence earned university-wide recognition, including Penn State's Outstanding Research Publication Award (2018) and the Outstanding Collaborative Research Team Award (2020).
In 2024, Dr. Foy joined Beebe Healthcare's Cardiovascular Institute as a board-certified cardiologist. He provides comprehensive inpatient and outpatient cardiovascular care, with clinical expertise in hypertension management, coronary artery disease, heart failure, atrial fibrillation, lipid disorders, chest pain evaluation, and syncope. Drawing upon his extensive background in health services research, Dr. Foy is committed to delivering evidence-based care that maximizes patient benefit while minimizing unnecessary testing and treatment. His approach combines clinical excellence, scientific rigor, and compassionate care to improve the health and well-being of patients throughout the community.
Core Faculty
Omar Mahmoud, MD is a board-certified Pulmonary and Critical Care Medicine physician at Beebe Healthcare and a dedicated educator who serves as a Core Faculty member for the Internal Medicine Residency at the R. Randall Rollins Center for Medical Education. With extensive clinical expertise in the diagnosis and management of complex pulmonary and critical care conditions, Dr. Mahmoud is committed to advancing patient care while fostering the development of future physicians.
As a Core Faculty member, Dr. Mahmoud plays an integral role in resident physician education, providing clinical teaching, mentorship, and guidance across inpatient and outpatient settings. He is passionate about helping resident physicians navigate the challenges of residency while developing the critical thinking, clinical judgment, and professionalism necessary to become exceptional internists. Known for his collaborative and approachable teaching style, he strives to create an environment where resident physicians feel supported, challenged, and empowered to grow.
Dr. Mahmoud earned his medical degree from the Università degli Studi di Brescia in Italy before completing his Internal Medicine residency training at the Icahn School of Medicine at Mount Sinai in New York City. He subsequently pursued fellowship training in Pulmonary and Critical Care Medicine at the University of Maryland in Baltimore, where he further refined his expertise in the care of critically ill patients and advanced pulmonary disease management.
His clinical interests include interstitial lung disease, pulmonary physiology, mechanical ventilation, and point-of-care ultrasound, with a particular focus on applying evidence-based practices to improve outcomes for patients with complex respiratory and critical care needs. Through his work at Beebe Healthcare, he combines advanced clinical knowledge with compassionate patient care, helping patients and families navigate some of the most challenging aspects of illness.
In addition to his clinical responsibilities, Dr. Mahmoud is deeply involved in resident physician and medical student education, simulation-based learning, and scholarly activity mentorship. He is dedicated to helping learners build both the knowledge and confidence necessary for successful careers in medicine while encouraging curiosity, academic inquiry, and lifelong learning.
Dr. Mahmoud's philosophy on education is rooted in the belief that medical training is fundamentally a team effort. Inspired by the exceptional mentors who guided him throughout his own training, he is committed to providing resident physicians with the same level of support, encouragement, and mentorship. He views medical education as a shared journey, where educators and resident trainees learn alongside one another, continuously refining their knowledge and skills through thoughtful questioning, collaboration, and clinical experience.
Core Faculty
Kunwal Nasrullah, MD is an Internal Medicine physician and dedicated medical educator who serves as a Core Faculty member for the Internal Medicine Residency at the R. Randall Rollins Center for Medical Education at Beebe Healthcare. With a strong foundation in clinical medicine, community engagement, and academic mentorship, Dr. Nasrullah is committed to helping develop the next generation of internists through compassionate teaching, evidence-based practice, and patient-centered care.
In her role as Core Faculty, Dr. Nasrullah plays an integral part in resident physician education, clinical instruction, curriculum development, and mentorship. She works closely with resident physicians to cultivate the knowledge, clinical judgment, and professionalism necessary for success in modern healthcare. Known for her approachable and collaborative teaching style, she is passionate about creating an inclusive learning environment where trainees are encouraged to grow, ask questions, and develop into confident and compassionate physicians.
Dr. Nasrullah earned her medical degree from the Boston University School of Medicine before completing her Internal Medicine residency training at TidalHealth Peninsula Regional Medical Center. Throughout her academic and professional journey, she has demonstrated a longstanding commitment to service, innovation, and advancing healthcare access for underserved communities. Her leadership and dedication were evident early in her career as the co-founder of the first student-led free health clinic at Boston Medical Center, an initiative aimed at improving healthcare access for vulnerable populations while creating meaningful learning opportunities for future healthcare professionals.
Her passion for community health and advocacy extends beyond clinical medicine. During the COVID-19 pandemic, Dr. Nasrullah served as the Lead Developer of a community response initiative in collaboration with About Fresh food trucks and Boston Medical Center, helping address food insecurity and support underserved populations during a critical public health crisis. Her commitment to service and innovation has been recognized through honors including the Massachusetts Medical Society Community Action Grant and the prestigious American College of Rheumatology/Association of Rheumatology Health Professionals (ACR/ARHP) Preceptorship Award. Earlier in her academic career, she was also recognized as a Semifinalist in the New York City Science and Engineering Fair (NYCSEF).
As a physician educator, Dr. Nasrullah is deeply committed to fostering the growth of resident physicians and medical students while promoting the values of health equity, community engagement, and lifelong learning. She believes that exceptional medical education extends beyond clinical knowledge and includes developing the empathy, cultural awareness, and communication skills necessary to care for diverse patient populations.
Dr. Nasrullah's multicultural background and language skills further enhance her ability to connect with patients and learners from a wide range of backgrounds. In addition to English, she speaks Punjabi, Urdu/Hindi, and Spanish, allowing her to communicate with and serve diverse communities more effectively.
Through her dedication to patient care, education, and community service, Dr. Nasrullah embodies the mission of the R. Randall Rollins Center for Medical Education and Beebe Healthcare. Her leadership, compassion, and commitment to excellence continue to make a meaningful impact on both resident physicians and the patients they serve.
Specialty Education Coordinators
Cardiology
Critical Care Medicine and Pulmonary Disease
Endocrinology
Gastroenterology
Geriatric Medicine & Infectious Disease
Hematology & Medical Oncology
Nephrology
Rheumatology