Alternative NamesNeonatal intensive care unit staff; NICU staffInformationAUDIOLOGISTAn audiologist is trained to test a baby's hearing and provide follow-up care to those with hearing problems. Most newborns have their hearing tested before leaving the hospital. Your health care providers will determine which hearing test is best. Hearing tests may be also be done after leaving the hospital.CARDIOLOGISTA cardiologist is a doctor that has special training in the diagnosis and treatment of heart and blood vessel disease. The cardiologist may examine the baby, order tests, and read test results. Tests to diagnose heart conditions may include:X-rayElectrocardiogram (EKG)EchocardiogramCardiac catheterizationIf the structure of the heart is not normal due to a birth defect, a cardiologist might