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Listed below are our ten outstanding providers of CSMG. Please see the 'About Us' page to get more information on our hospital affiliations.

Kaustubh V. Patankar, M.D., FACC

Cardiologist & Medical Director, CSMG

Dr. Patankar has been in private practice in Riverside for over 20 years. After completion of his Cardiology Fellowship at the University of California, San Francisco, he trained in Interventional Cardiology at the prestigious Galichia Institute in Wichita, Kansas. Board Certified in Internal Medicine, and Cardiology, He treats all types of cardiovascular conditions and specializes in pacemakers, complex coronary and peripheral interventions. Dr. Patankar serves on various hospital and medical boards and is committed to improving medical care in the community.

Mimi Sen Biswas, M.D., MHSc

Cardiologist & Director, CSMG Women’s Heart Clinic

Dr. Biswas completed her B.S. at the California Institute of Technology (Cal Tech), received her MD from the UCLA School of Medicine, and completed her residency at Cedars-Sinai Medical Center in Los Angeles. At Duke University Medical Center, she completed her Cardiology Fellowship, a fellowship in Women’s Health, obtained a Master’s in Health Science, and is still involved in clinical research. While on the faculty at Duke, she founded and was the Clinical Director of the Duke Women’s Heart Care Clinic. In addition to being board-certified in Internal Medicine, Cardiology and Nuclear Cardiology, she is trained in cardiac CT imaging. She specializes in cardiovascular imaging, prevention, and women’s cardiovascular care. Dr. Biswas is dedicated to developing a center for Women’s Heart Health in the Inland Empire, and to raising awareness about women and heart disease.

Niraj V. Parekh, M.D

Interventional Cardiology and Vascular Disease

Dr. Parekh completed his Internal Medicine residency at the University of California, San Diego and went on to Loyola University in Chicago for his General and Interventional Cardiology fellowships. He now returns to Southern California to be close to family and friends. Dr. Parekh is board certified in Interventional and General Cardiology, Echocardiography, Nuclear Medicine, and Vascular Study Interpretation. He specializes in percutaneous interventions of the coronary arteries as well as using this non-surgical technique to repair structural heart disease including but not limited to atrial septal defects, patent foramen ovale, and aortic stenosis. His expertise in vascular disease also allows him to treat peripheral arterial/venous disease including non-healing ulcers and wounds of the lower extremities, abdominal aortic aneurysms, and stenosis of the carotid vessels. Dr. Parekh is a member of the American College of Cardiology and the American Heart Association. He is committed to treating cardiovascular disease with minimally invasive procedures that allow faster recovery and improved patient care.

Nader Nashaat Attia, D.O.

Dr. Attia is a California native making his homecoming after ten years spent away for training. Dr. Attia completed his undergraduate degree with a Bachelors of Sciences from the University of California at Irvine. He then went on to obtain his medical degree from Kansas City University College of Osteopathic Medicine. Following medical school, he completed his residency in Internal Medicine at Garden City Hospital an affiliate of Michigan State University College of Osteopathic Medicine. He then completed his General Cardiology fellowship at McLaren Macomb Hospital, also an affiliate of Michigan State University-College of Osteopathic Medicine. Dr. Attia is board certified in Cardiology, Internal Medicine and Nuclear Cardiology. Dr. Attia is trained to perform various cardiovascular procedures including but not limited to cardiac catheterization and transesophageal echocardiography.

Jeremy, Cox, DO.

Dr. Cox completed medical school at Western University of Health Sciences, College of Osteopathic Medicine in Pomona, CA and is returning to the area after completing Internal Medicine and General Cardiology training to be near family and friends. He received his Bachelor of Science degree in Toxicology from The University of Louisiana at Monroe, Monroe, LA. He completed his Internal Medicine training at West Palm Hospital in West Palm Beach, Florida an affiliate of Nova Southeastern School of Osteopathic Medicine. He completed his General Cardiology fellowship training at Deborah Heart and Lung Center in Browns Mills, NJ an affiliate of Philadelphia College of Osteopathic Medicine. Dr. Cox is board certified in Internal Medicine, Echocardiography, Nuclear Cardiology, and Vascular Ultrasound interpretation. His interests include Cardiac Imaging as well as the diagnosis and treatment of valvular heart disease, coronary artery disease, and congestive heart failure. He is trained to perform transesophageal echocardiography, cardioversion, and some diagnostic cardiac catheterization procedures.

Jatin N Amin, MD

Dr. Jatin Amin started his education at the University of Illinois Medical School in Chicago. He then went on to complete his Medical Degree at Loyola University Stritch School of Medicine, In 1991.
His residency and training for Internal Medicine continued at Loyola Medical Center. During this time, simultaneous academic research was undertaken in the Physiology Masters’ Program investigating the chemical and microscopic function of the heart. In conjunction with the research and training, Dr. Amin was assigned a faculty position at Loyola as a Clinical Instructor for the Loyola University Emergency Room.
Cardiology training was set forth after moving to California at the Loma Linda University Medical Center in 1996 and finishing in 1999. Academic research work continued at the Veterans Administration Medical Center, with a focus on cardiac conduction and timing for heart contraction and relaxation. During this time, several research presentations were made at the American College of Cardiology and the American Heart Association.

Bradley S Messenger, MD


Dr. Messenger received his Bachelor of Science in Biology at the University of Los Angeles. He then went on to further his education at the Albert Einstein College of Medicine in Bronx, New York. After completing his Medical School he then went to UCLA where he completed his Internal Medicine and his Cardiology and Electrophysiology Fellowship. During this time he has completed various research work and has published various journal articles. With his 17 years of knowledge, he is going to be an asset to our company and Cardiology field as a whole.

Sandeep Sangodkar, DO. FACC

Dr. Sangodkar grew up in Southern California and received his Bachelor of Science in Physiology and Neuroscience at UC San Diego. He then obtained a Masters of Science in Physiology and Biophysics from Georgetown University in Washington, DC before completing medical school at Western University. He received his Internal Medicine training at the University of Chicago (Northshore) and also was chosen as a Chief Resident. He then moved to Albuquerque to complete his Cardiology fellowship at the University of New Mexico. During his fellowship, he authored several presentations at the American College of Cardiology annual meetings and also the American Heart Association Scientific Sessions in addition to serving as Chief Fellow. Dr. Sangodkar now returns to Southern California to be closer to friends and family and is excited to provide compassionate care to the community. He has a strong interest in non-invasive cardiac imaging and a passion for preventive care and cardiovascular wellness.

Sinan Sarsam M.D.

Dr. Sarsam obtained his medical degree from the University of Baghdad College of Medicine in Iraq. Following the Second Gulf War, he moved to the United States and completed his residency in Internal Medicine at the Detroit Medical Center / Wayne State University. Dr. Sarsam completed advanced Heart Failure and Transplant Fellowship at Texas Heart Institute in Houston. He then completed his general Cardiology Fellowship at Providence Providence-Park Hospitals / Michigan State University where he stayed another year for interventional cardiology fellowship training. Dr. Sarsam moved to California to reunite with his family after 10 years of postgraduate training. Dr. Sarsam is board certified in Internal Medicine, Interventional Cardiology, Cardiovascular Medicine, Echocardiography, Cardiac CT and Nuclear Cardiology, and Vascular Study Interpretations. Dr. Sarsam is trained to perform various cardiovascular procedures including but not limited to cardiac catheterization and percutaneous interventions, peripheral vascular interventions for patients with limb ischemia and carotid disease, cardioversion and transesophageal echocardiography. Dr. Sarsam is dedicated to apply for evidence-based medicine and perform minimally invasive percutaneous treatments for patients with cardiovascular disease.

Christopher Seaman, MD.

Dr. Seaman grew up in California. He received his undergraduate education at Vassar College and attended medical school at New York Medical College. He completed his residency in internal medicine at the University of Califonia, Davis, followed by fellowships in cardiovascular disease and interventional cardiology at Hahnemann University Hospital/Drexel University and NYU/Winthrop Hospital. He
has authored multiple presentations and papers and is board certified in internal medicine, cardiovascular disease, and interventional cardiology with additional certifications in echocardiology and nuclear cardiology. Dr. Seaman offers services in both general and interventional cardiology, including minimally invasive cardiac catheterizations and percutaneous interventions. Dr. Seaman works to include patients and their families in all steps of decision making.