This is a Sources Sought Notice for market research to identify potential contractors capable of providing reference laboratory testing services for 11 specified VA Medical Centers and Health Care Centers across Missouri, Kansas, Illinois, and Indiana. The potential contract would include a base year and four one-year option periods. A draft Performance Work Statement and test list with estimated quantities are provided for review. Responses to this notice are due by February 6, 2026, at 3:00 PM CST. The notice includes detailed instructions and a list of questions that responders must address regarding their capabilities, accreditations, and past performance.