Our Team


Arvinder “Daisy” Uppal, M.D.

President & CEO, Radiologist

President and CEO, Charter Radiology

Dr. Arvinder “Daisy” Uppal has many roles at Charter Radiology – founder and chief executive officer, radiologist, patient advocate, and team builder. Combining her passion for radiology with her love for taking care of people, Dr. Uppal has built Charter Radiology into one of the region’s most advanced radiology practices.

Dedicated to personalizing the face of radiology to better serve patients’ needs, Dr. Uppal’s care philosophy is to treat every patient like family, a mantra she takes to heart. In addition to her well known reputation for precision and acuity in all of her radiology readings and diagnoses, Dr. Uppal is also best known by referring physicians and patients as a doctor who values personalized care above all. From the practice’s leading edge technology down to the bowls of candy placed in the patient waiting area, patients and physicians are drawn to Dr. Uppal’s undeniable radiology expertise as well as her compassionate demeanor.

“I am a scientist and a Johns-Hopkins trained physician, but what makes me different is my deep concern for the patients that I serve. Addressing people as the whole of their beings – the physical, emotional, and spiritual – defines who I am and how I care for my patients. My approach truly resonates with people,” says Dr. Uppal.

Dr. Uppal received her medical degree from Albany Medical College and completed a radiology fellowship at The Johns Hopkins Hospital. During her medical training, she was the recipient of two prestigious research awards and has authored numerous articles and presentations on advancements in radiology. She previously served as radiology chairperson at Howard County General Hospital as well as the outpatient center medical director for American Radiology Services.

Dr. Uppal founded Charter Radiology to provide the most advanced level of radiology services in a more personal environment. Her level of attention to both the patients and the physicians she works with is unique in a healthcare environment that sometimes values quantity over quality. Charter Radiology offers the most sophisticated, state-of-the-art technology including 3 Tesla wide bore scanners, which is the gold standard in imaging equipment today. In addition to the best technology, Dr. Uppal surrounds herself with the finest radiology team to offer patients an unparalleled experience.

“Yes, I have the education and credentials, my readings are accurate, and I have the very best imaging technology, but it’s the genuine concern that I have for my patients that sets Charter apart. People want great medical care from a doctor who wouldn’t treat strangers any differently than she would treat her own family. And, that’s what we deliver at Charter Radiology.”

Click Here to Learn More About Dr. Uppal!

Sudhir Kathuria, M.D.

Diagnostic Radiology, Neuroradiology

Sudhir Kathuria, M.D. is an American Board Certified Radiologist with subspecialty CAQ certification in Neuroradiology. He received his medical degree and initial radiology training from India. He completed three years of fellowship training in Diagnostic Neuroradiology, Interventional Neuroradiology, and Advanced Neuroimaging at the University of Rochester, NY.

Dr. Kathuria has worked closely with a team of neurosurgery, neurology, and orthopedic surgeons in providing the highest quality patient care and served as Director of spine interventions and Director of advanced 320 slice CT imaging at the Johns Hopkins Hospital in Baltimore from 2008 to 2014. He twice received the Johns Hopkins Service Excellence Award and Recognition for demonstrating exemplary service excellence and for inspiring others to do their best.

Dr. Kathuria has extensively written in peer-reviewed journals and presented numerous scientific papers at national and international meetings on a wide range of topics related to diagnostic and interventional neuroradiology. His research work presentations have won various awards including “Best Scientific Exhibit Award, ASSR Annual symposium 2010” and “Summa Cum Laude Award” at ASNR annual Scientific meeting 2011.

Dr. Kathuria brings his unique clinical and academic experience to work with referring physicians in providing the best patient care at Charter Radiology.

Ryan T. Geracimos, M.D., M.B.A.

Diagnostic Radiology, Neuroradiology, Cross-sectional and Muskuloskeletal Imaging

Ryan Geracimos, M.D., M.B.A., joined Charter Radiology in July 2020 as a diagnostic radiologist with a special focus on neuroradiology, cross-sectional, and musculoskeletal imaging. Dr. Geracimos brings a wealth of radiology experience to Charter Radiology in addition to expertise in quality and patient safety measures.

A consummate leader in the medical field, Dr. Geracimos also currently serves as Chief Medical Officer at ChristianaCare – Cecil County. Previously, he was President of Union Radiologists, LLC, a private practice radiology group providing imaging services to hospital and ambulatory sites in Cecil County.

Dr. Geracimos received his medical degree from Jefferson Medical College and his Master’s of Business Administration from the University of North Carolina, Chapel Hill. He completed his internal medicine internship at Franklin Square Hospital in Baltimore, MD, and his residency in diagnostic radiology at ChristianaCare in Newark, DE. He is board-certified by the American Board of Radiology.

Jarett Thelen, M.D.


Jarett Thelen, MD, joined Charter Radiology in 2021 as a neuroradiologist, working closely with Dr. Sudhir Kathuria. Prior to joining Charter Radiology, Dr. Thelen completed his fellowship-training in neuroradiology at The University of Rochester Medical Center where he also served as an Assistant Professor of Neuroradiology.

Dr. Thelen received his Bachelor of Science degree in biology and English from The University of Wisconsin in Madison, WI before completing his Doctor of Medicine degree at The University of Rochester School of Medicine. Here he also completed his internship in internal medicine and his radiology residency.

Dr. Thelen has published numerous professional radiology articles, abstracts, and presentations as well as given oral lectures and presentations. He is a member of the American Society of Neuroradiology, the American Society of Head and Neck Radiology, the Radiological Society of North America, and the American Roentgen Ray Society.