Some states, like Arkansas, California, Kansas, Kentucky, Utah, and West Virginia, only test for 4 conditions, including PKU, congenital hypothyroidism, galactosemia, and sickle cell disease.
Other states, like Alaska, Connecticut, Hawaii, Idaho, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Mississippi, Nevada, New York, North Dakota, Oregon, Rhode Island, Tennessee, Vermont, Virginia, Washington, and Wisconsin, screen for an additional 5 disorders, including congenital adrenal hyperplasia (CAH), biotinidase deficiency, maple syrup urine disease, homocystinuria, and medium-chain acyl-CoA dehydrogenase (MCAD) deficiency.
So a baby born with MCAD in Alaska can be identified at birth, be started on a special diet, and avoid serious disabilities, including mental retardation, or death, that the baby might have if he was born in California and not identified.
The March of Dimes recently released their report card on newborn screening that showed that most states still don't screen newborns for 9 core conditions that could identify many children with life threatening conditions.
In addition to the 9 core conditions that the March of Dimes recommends that children be screened for, there are even more tests that can be done. Some states have already started offering these supplemental newborn screening tests. However, if you don't live in one of these states or don't live in a state that at least tests for the minimum 9 core conditions as recommended by the March of Dimes, you can get the supplemental screening done on your own.

