The National Institutes of Health (NIH) intends to award a fixed-price purchase order to Laboratory Corporation of America for laboratory testing services. The testing services include measuring 11-oxo-androgens, which are newly available biomarkers for adrenal disorders. LabCorp is the only commercial laboratory that measures an 11-oxo-androgen panel, making it the only suitable option for this clinical research protocol. • The place of performance is Bethesda, MD 20892 USA. • The NAICS code for this opportunity is 541380, which corresponds to Testing Laboratories and Services. • The product service code is Q301, which corresponds to Laboratory Testing. • The NIH Clinical Center Department of Pediatrics has utilized LabCorp for genetic testing for CAH due to 21-hydroxylase deficiency since 2004. • Switching laboratories could necessitate other testing to be performed on historical data, which would increase the cost to the government and potentially impair clinical care.