The Department of Veterans Affairs, through the Network Contracting Office (NCO) 16, intends to award a sole-source contract to Thermofisher Scientific for the provision of Fisher Immunosuppressant clinical products. This procurement aims to supply reagents, kits, and consumables necessary for in vitro diagnostic medical devices that quantitatively determine tacrolimus levels in human whole blood, which is critical for managing kidney and liver allograft patients receiving tacrolimus therapy. The contract is set to run from November 1, 2025, to September 30, 2026, with four optional one-year extensions, and interested parties must submit a capabilities statement by October 27, 2025, at 3:00 PM CST to kimberly.anderson6@va.gov, referencing solicitation number 36C25626Q0083. All interested vendors must be registered with the System for Award Management (SAM) to be eligible for contract award.