RK.MD is the educational and professional platform of Rishi Kumar, MD, a board-certified cardiac anesthesiologist and cardiovascular intensive care unit intensivist. Through articles, clinical references, and personal reflections, Dr. Kumar shares knowledge and experience across perioperative medicine, critical care, medical education, ultrasonography, pharmacology, and technology. The site also documents his training, from medical school and anesthesiology residency to fellowships in critical care and adult cardiothoracic anesthesiology, offering readers a view of the path through physician training.

RK.MD supports clinicians and learners with a collection of iOS reference apps. These include AnesthesiaRef for clinical anesthesia, EBMRef for landmark research summaries, ECGRef for electrocardiograms and arrhythmias, EchoRef for ultrasonography, LabRef for clinical laboratory interpretation, ShockRef for shock and hemodynamics, and VentRef for ventilation and oxygenation. Alongside medical resources, the site features writing on productivity, technology, and life outside medicine. Its purpose is to encourage curiosity and lifelong learning while making practical information accessible. Content is accompanied by terms of use and disclaimers.