Request Information 888.529.9018

Cardiologists

Stewart Allen

Stewart Allen, MD, FACC

Dr. Stewart Allen brings considerable training and expertise in general and interventional cardiology. He was trained at Wake Forest University in Winston-Salem, North Carolina and completed fellowships in clinical cardiology, cardiovascular research and interventional cardiology.

Dr. Allen’s expertise includes advanced coronary interventions, peripheral artery interventions, transcatheter aortic valve replacement and pacemaker placement. He predominately uses the radial artery for heart catheterizations, a technique that patients have overwhelmingly preferred in clinical trials. In addition to practicing as an interventional cardiologist, Dr. Allen has a strong interest in a patient specific, preventative approach. He has served as a spotlight series speaker for the American Heart Association and has given numerous lectures on preventative health and risk factor modification. He has also been designated as a specialist in clinical hypertension by the American Society of Hypertension. He is board certified in Internal Medicine, Cardiovascular Disease, and Interventional Cardiology. Most recently, he has been appointed Medical Director of Cardiology for the Adventist Heart Institute.

L. Bing Liem

L. Bing Liem, DO, FHRS, FACC

Dr. L. Bing Liem earned his medical degree from Michigan State University College of Osteopathic Medicine where he received the Zandos Award for Outstanding Academic Achievement. He completed his internship and residency in internal medicine and cardiology in Michigan, and furthered his fellowship in cardiology and electrophysiology at Stanford University Medical Center in Stanford, CA. He then became a faculty member at Stanford for 15 years before pursuing a career in private practice. He is board certified in internal medicine, cardiovascular disease and earned a special competency in cardiac electrophysiology.

Madhusudan Borde

Madhusudan Borde, MD, FACC, FCCP, FACP, FAHA

Dr. Madhusudan Borde brings exceptional training and experience. He earned his medical degree from Gandhi Medical College in Hyderabad, India receiving the highest marks. He completed internships at Gandhi Hospital in Secundrabad, India, and at Prince George’s General Hospital and Medical Center in Cheverly, Maryland. Following his internships, he completed a residency in internal medicine at Prince George’s General Hospital and Medical Center. He then completed a fellowship in cardiology at Northwestern University Medical School in Chicago, Illinois, where he also taught. He previously served as a staff cardiologist and Chief of Non-Invasive Cardiac Laboratories at David Grant United States Air Force Medical Center at Travis Air Force Base in Fairfield, CA. Dr. Borde is board certified in both internal medicine and cardiology.

Dr. Borde has held many leadership roles, including Director of Critical Care, Chief of Medicine and Chief of Staff at Sutter Solano Medical Center in Vallejo, CA.

Peter Chang-Sing

Peter Chang-Sing, MD, FACC

Dr. Peter Chang-Sing has been in clinical practice in cardiology since 1991. He received his B.S. in Biological Sciences and M.S. in electrical engineering from Stanford University and was then concurrently enrolled in the M.D. program at Yale Medical School and the PhD program at Harvard Medical School where he also taught. He completed his internship in internal medicine at New York University Medical Center and his residency in internal medicine and fellowships in cardiology and clinical cardiac electrophysiology at Cedars-Sinai Medical Center in Los Angeles.

Dr. Chang-Sing is certified by the American Board of Internal Medicine in Internal Medicine, Cardiovascular Disease and Clinical Cardiac Electrophysiology. He is a Fellow of the American College of Cardiology and a Fellow of the Heart Rhythm Society. He is Chief of Cardiovascular Disease and Cardiac Surgery and Medical Director of the Cardiac Electrophysiology Lab at Santa Rosa Memorial Hospital. His practice consists of consultative as well as procedural cardiology, with interests in congestive heart failure, arrhythmia management and coronary artery disease. He enjoys spending time with his wife and two children, traveling, hiking, fishing and Stanford football.

Emily Conway

Emily Conway, MD, FACC

Dr. Emily Conway is a board certified cardiologist who is highly regarded by her peers and patients. Dr. Conway is passionate about women’s heart health and serves on the executive leadership committee for the American Heart Association’s Go Red for Women campaign.

Dr. Conway earned her medical degree from Brown University School of Medicine in Providence, Rhode Island. She completed an internship and residency in internal medicine at Thomas Jefferson University Hospital before completing a fellowship in cardiovascular disease at Lankenau Hospital in Wynnewood, Pennsylvania where she served as Chief Fellow. Prior to joining the Adventist Heart Institute, Dr. Conway was in private practice for 5 years. She is an active member of the American College of Cardiology, Women in American College of Cardiology, American Society of Echocardiography and the American Heart Association, Go Red for Women.

Monica S. Divakaruni

Monica S. Divakaruni, MD

Dr. Monica Divakaruni earned her medical degree from University of California San Francisco School of Medicine in San Francisco, CA. She completed her internship and residency in internal medicine at Stanford University Medical Center, where she served as Chief Resident. In addition, she completed a fellowship in cardiovascular disease and interventional cardiology at Stanford University Medical Center. She is board certified in internal medicine, cardiology and interventional cardiology.

Focusing on innovative treatment options, Dr. Divakaruni keeps at the forefront of new diagnostic testing and the most advanced cardiac catheterization techniques available, including transcatheter aortic valve replacement. She predominately uses the transradial approach for cardiac catheterization which provides patients with a shorter, more comfortable recovery and a reduced risk of bleeding.

Dr. Divakaruni is an expert in women’s heart disease and is passionate about providing all aspects of cardiac care – from education and prevention to diagnosis and treatment.

Lou Ivanovic

Lou Ivanovic, MD

Dr. Lou Ivanovic has advanced training and experience in clinical and interventional cardiology. He joins us from the Chicago Cardiology Institute where he was a senior partner. He earned his medical degree from the University of Belgrade Medical School in Serbia. He went on to complete a residency at West Suburban Hospital Medical Center in Oak Park, IL and then a clinical fellowship at the University of Illinois at Chicago in Chicago, IL. He furthered his training through a peripheral vascular interventional training program at St. John Medical Center in Springfield, IL. Dr. Ivanovic is board certified by the American Board of Internal Medicine, Cardiovascular Disease.

Throughout his career, Dr. Ivanovic has maintained a teaching appointment at Loyola University Medical School in Chicago and has trained hundreds of young doctors now in practice. Dr. Ivanovic takes great pride in working closely with his patients to educate them about disease prevention and diverse diagnostic and therapeutic options.

Daniel Kaiser

Daniel Kaiser, MD

Dr. Daniel Kaiser is a board certified clinical cardiac electrophysiologist, specializing in innovative ablative procedures for arrhythmias, including the Hybrid Maze procedure. Having earned his medical degree from Vanderbilt University School of Medicine, he continued on to complete a combined internal medicine and cardiology fellowship before being recruited by Stanford University for a second fellowship in clinical cardiac electrophysiology. Dr. Kaiser holds several patents for medical devices and is launching a full-scale research initiative as part of the St. Helena Arrhythmia Center.

In his spare time, Dr. Kaiser enjoys water sports including wakeboarding and water skiing. He is an avid Duke University basketball fan and a self-proclaimed “Cameron Crazy”.

Whie Oh

Whie Oh, MD, FACC, FAIC, NASPE

Dr. Whie Oh received his medical degree from Seoul National University College of Medicine in Seoul, South Korea. After internships at Red Cross Hospital in Seoul and St. Thomas Hospital in Nashville, Tennessee, Dr. Oh completed two residencies at White Memorial Medical Center in Los Angeles. He is board certified in internal medicine, cardiovascular diseases and interventional cardiology.

Jeong Sik Park

Jeong Sik Park, MD, FACC, FAIC, NASPE

Dr. Jeong Sik Park received his medical degree from Seoul National University College of Medicine in Seoul, South Korea. After an internship and residency at Seoul National University Hospital, Dr. Park completed a fellowship and residency at Loma Linda University Medical Center. He is board certified in internal medicine, cardiovascular disease, nuclear cardiology and echocardiography.

David R. Ploss

David R. Ploss, MD

Dr. David R. Ploss is a board certified cardiologist with over twenty years of active practice experience. He earned his medical degree from Tufts University School of Medicine in Boston, Massachusetts, graduating in 1987. He completed a residency in internal medicine at University of California San Francisco followed by a fellowship in cardiology at California Pacific Medical Center in San Francisco, CA. He then completed a second fellowship in cardiac electrophysiology at the West Los Angeles VA Medical Center in Los Angeles, CA.

Prior to joining the Adventist Heart Institute, Dr. Ploss grew the Pacific Heart Group to become the largest cardiology practice in Humboldt County. He has served in many leadership roles throughout his career, including Chief of Staff and Director of the Cardiac Catheterization Laboratory. His most recent leadership role is Chief of Medicine for Ukiah Valley Medical Center. Dr. Ploss assisted the Community Health Clinic System and St. Joseph Hospital to develop and direct a community Congestive Heart Failure Clinic in Humboldt County. Prior to this, Dr. Ploss was at the Dayton Heart Center in Dayton, Ohio where he developed the cardiac electrophysiology program.

Dr. Ploss brings with him many years of excellence and experience. He is an active member of the Heart Rhythm Society, American College of Cardiology and the American Medical Association. He is interested in the arts and local politics and previously served as president of the Redwood Art Association.

Jon S. Portnoff

Jon S. Portnoff, MD

Dr. Jon S. Portnoff has been practicing in Ukiah for over 25 years. Dr. Portnoff treats and cares for a patient throughout the entire continuum of cardiac care, whether it be education and prevention, advanced diagnostic testing to a procedure. Dr. Portnoff is a graduate of American University of the Caribbean. He completed his residency at the University of Wisconsin Medical School in Milwaukee, and had his fellowship training at Loma Linda University Medical School before coming to Ukiah.

Start living. Heart healthy.

Request More Information

Call 888.529.9018 to speak with a Patient Service Advisor, or fill out the form and we’ll contact you soon.

The Adventist Heart Institute values your privacy and handles your personal information with care. Your email address and information is secure, confidential and will not be sold to any third party sources.

AHI Rebrand

To talk with someone immediately, call 888.529.9018

The Adventist Heart Institute values your privacy and handles your personal information with care. Your email address and information is secure, confidential and will not be sold to any third party sources.

AHI Rebrand