Laboratory performance in neonatal bilirubin testing using commutable specimens: a progress report on a College of American Pathologists study.

Context: In 2003 the Chemistry Resource Committee of the College of American Pathologists introduced a commutable specimen in the Neonatal Bilirubin Surveys. This specimen was intended to help evaluate all bilirubin methods.

Objective: To evaluate the effect of commutable specimens on the performance of selected clinical analyzers in measuring neonatal bilirubin from 2003 through 2006.