Background: Population-based newborn screening for genetic and metabol
ic disorders is standard practice in all states in the United States.
Policies governing newborn screening are determined at the state level
; however, and thus, a great degree of variability exists between stat
es regarding many facets of such screening. Objective: To gather infor
mation relating to the processes, content, and outcomes of policy maki
ng affecting newborn screening programs across the United States. Meth
ods: We surveyed the directors of newborn screening programs for each
of the 50 states using a postal questionnaire. The questionnaire solic
ited information about the specific tests incorporated in each state's
panel of screening tests and information pertaining to the policymaki
ng processes by which decisions are reached regarding this testing. Re
sults: Substantial variation exists across states regarding both the p
rocesses of policy formulation and the outcomes of decisions made abou
t newborn screening. All states currently screen for phenylketonuria a
nd congenital hypothyroidism. Extensive variation exists across states
in testing for other disorders. The processes by which state policy m
akers arrive at decisions in this area are extremely diverse. Almost t
hree fourths of the states have standing expert advisory bodies who is
sue recommendations regarding screening program modifications, but the
authority granted to these panels varies substantially. Some regional
cooperation in this area exists. Conclusions: Further development of
regional cooperation could offer some states greater efficiency in bot
h laboratory testing and screening policy formulation. From the standp
oint of an individual state, Wisconsin's approach to policy developmen
t in this area is described as a model worthy of consideration.