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Stewart Allen


Dr. Laird is an internationally renowned interventional cardiologist focusing on innovative procedures for carotid artery disease, abdominal and thoracic aortic aneurysmal disease, renal artery disease and peripheral artery disease. He has vast experience performing more than 5000 endovascular diagnostic and interventional procedures and has lectured and performed endovascular procedures around the world. He has also been a leader in the development of Drug Coated Balloon for peripheral artery disease.

Dr. Laird earned his medical degree from Albany Medical College in Albany, New York in 1984. He completed a residency at Madigan Army Medical Center in Tacoma, Washington followed by a fellowship at Walter Reed Army Medical Center in Washington D.C. Dr. Laird is board certified in internal medicine, cardiovascular disease and interventional cardiology. Prior to joining the Adventist Heart & Vascular Institute, Dr. Laird served as the Medical Director at UC Davis Vascular Center.

Among his many areas of leadership and innovation are the investigation of new stents for carotid and peripheral vascular applications and the development of laser angioplasty. He uses the Excimer laser as a tool for complex peripheral interventions and in limb salvage situations. Dr. Laird is known for innovation, teaching vascular interventions to other physicians and his role in organizing and conducting clinical trials of new therapies for vascular disease.

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.

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.

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.

Susan Judith Eisenberg, MD

Cardiac Electrophysiologist

Dr. Susan Eisenberg is a board-certified cardiac electrophysiologist specializing in innovative ablative procedures for arrhythmias. Dr. Eisenberg has nearly three decades of experience and is highly respected by her peers for her skill and collaborative and individualized approach to patient care.

Dr. Eisenberg earned her medical degree from New York Medical College and continued on to do her internship and residency at University of California San Francisco, where she later completed a fellowship. She has published research and presented internationally on atrial fibrillation and cardiac care.

Dr. Eisenberg is board-certified by the American Board of Internal Medicine in clinical cardiac electrophysiology. Before joining the Adventist Heart & Vascular Institute she served as medical director of the John Muir Health Cardiac Rhythm Center.

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.

Benjamin Meyer, MD

Benjamin Meyer, MD

Dr. Benjamin H. Meyer, is a board certified cardiologist with over 39 years of experience specializing in cardiovascular disease and interventional cardiology. He is very well respected by his patients and his colleagues.

Dr. Meyer graduated from medical school with honors from the University of South Alabama, where he also completed an internship. He moved to Louisiana for a residency at Louisiana State University Hospital, before going to Medical College of Pennsylvania Hospital to complete a fellowship.

Dr. Meyer holds certifications from the National Board of Medical Examiners, American Board of Internal Medicine, and the sub-specialty boards, Cardiovascular Disease and Interventional Cardiology.

John Minotti

John Minotti, MD

Dr. John Minotti is board certified in internal medicine and cardiovascular diseases. He has over three decades of experience helping patients live heart healthy.

Dr. Minotti graduated from Louisiana State University School of Medicine before completing his internship and residency at the University of Southern California. He completed a cardiology fellowship at the Milton S. Hershey Medical Center in Hershey, Pennsylvania. Later, he served on the faculty of the University of California San Francisco Medical School.

A longtime Lakeport physician, Dr. Minotti specializes in treating heart disease with an experienced and comprehensive approach.


Lakshmi Nair

Lakshmi Nair, MD, FACC

Dr. Lakshmi Nair, FACC, is a highly-trained, dedicated general cardiologist who is part of the Adventist Heart & Vascular Institute physician team. Dr. Nair brings nearly two decades of training and experience to serve Mendocino County patients with compassionate, patient-centered care. Dr. Nair is triple board-certified in internal medicine, cardiovascular disease and nuclear cardiology. As a cardiologist with a patient-first philosophy, Dr. Nair prioritizes education and collaboration with her patients and fellow providers. She was in private practice prior to joining the Adventist Heart & Vascular Institute.

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.

Kathleen Tong, MD

Kathleen Tong, MD

Dr. Kathleen Tong is a specialist in the management of heart failure patients, pulmonary hypertension patients and preventive cardiology and cardiac rehabilitation. She completed medical school at the Northwestern University Feinberg School of Medicine in Chicago and did her residency in internal medicine at UC Davis Medical Center. She later completed a cardiovascular medicine fellowship at UC Davis Medical Center and an advanced heart failure and heart transplantation fellowship at UC San Francisco Medical Center.

Dr. Tong served as the director of the heart failure program and director of the preventative cardiology and cardiac rehabilitation program at UC Davis Medical Center, where she conducted research on the effectiveness of multidisciplinary strategy in the transition of care of heart failure patients from the inpatient to the outpatient setting. She is board certified in advanced heart failure and cardiovascular medicine.

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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.

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