He has also been recognized as a Fellow of several prestigious organizations, including the American College of Cardiology (FACC), the European Society of Cardiology (FESC), and the Society for Cardiovascular Angiography and Interventions (FSCAI).

Dr. Mahajan has a vast amount of experience in the field of cardiology. He has worked at several renowned institutions, including Grant Medical College & Sir J. J. Hospital and L. T. Municipal Medical College & Hospital. He has also served as a Consultant Interventional Cardiologist at Arneja Heart Institute in Nagpur. His extensive experience has provided him with a deep understanding of various cardiac conditions and their management.

Dr. Mahajan's contributions to the field of cardiology have been recognized with several awards and honors. He received the "H.B. Singh Memorial Gold Medal" for securing the highest marks in Community Medicine in Nagpur University. He has also been awarded the "Award for Excellence - Cath Lab" by the Cardiology Department of L.T.M.M. College & L.T.M.G. Hospital. Additionally, he received the "Best Case Award" at TCTAP Seoul, Korea for successfully managing a complex case of stent dislodgement during coarctoplasty.

Dr. Mahajan is actively involved in research and has published several papers in peer-reviewed journals. His research interests include acute myocardial infarction, coronary artery disease, and heart failure. He has also contributed chapters to textbooks and has been a principal investigator in several randomized controlled trials.

Dr. Ajay U. Mahajan is a highly skilled and experienced cardiologist who is dedicated to providing the best possible care to his patients. His vast knowledge, expertise, and commitment to research have made him a valuable asset to the medical community.