The Indian Health Service is seeking market research to identify qualified vendors for blood bank services at the Cheyenne River Health Center in Eagle Butte, South Dakota. The contract will provide blood units and components, along with higher-level testing not available locally, under a firm fixed-price purchase order. The anticipated period of performance includes a base year plus two option years. Responses to this sources sought notice are due by Thursday, May 21, 2026, at 1:00 PM Mountain Time. No budget amount is specified, and this notice is for planning purposes only, not a solicitation.