Dr. Hennessey Tseng is a cardiologist in Walnut Creek, California and is affiliated with multiple hospitals in the area, including John Muir Health-Walnut Creek Medical Center and John Muir Health-Concord Medical Center. He received his medical degree from Emory University School of Medicine and has been in practice for more than 20 years. Dr. Hennessey Tseng has expertise in treating coronary artery disease, heart failure, hypertension & high blood pressure, among other conditions - see all areas of expertise. Dr. Hennessey Tseng accepts Medicare, Aetna, Humana, Blue Cross, United Healthcare - see other insurance plans accepted.