North Oaks staff welcomes Heintz North Oaks staff welcomes Heintz Advocate staff report Dec. 26, 2012 Comments Urologist Jay W. Heintz joined the North Oaks Multispecialty Group in Livingston. Heintz treats conditions of the male and female urinary tracts and male reproductive system. He also treats disorders of the kidney, bladder and prostate. New patient appointments are being scheduled for children and adults. For an appointment, or more information on clinic hours and accepted insurance plans, call (225) 686-4960.