The National Institutes of Health (NIH) Clinical Center in Bethesda, MD, intends to award a sole source contract to Bio-Rad Laboratories for Liquichek Tumor Reagents, which are testing controls for cardiac, cancer, and infectious disease markers. This notice is for informational purposes only and is not a request for quotations. The requirement supports the Department of Laboratory Medicine’s Immunoassay laboratory, which provides consistent, high-quality results for clinical center patients across 35 protocols. Bio-Rad is the sole manufacturer, and substitution would require revalidation and regulatory approval, potentially delaying treatment and risking patient care. Interested parties may submit a capability statement demonstrating their ability to meet the requirement.