UNSPSC 41131728: Prothrombin time test

In this classification a prothrombin time test is a device used as a general screening procedure for the detection of possible clotting factor deficiencies in the extrinsic coagulation pathway, which involves the reaction between coagulation factors III and VII, and to monitor patients receiving coumarin therapy (the administration of one of the coumarin anticoagulants in the treatment of venous thrombosis or pulmonary embolism) US FDA regulates Prothrombin time test under 21 CFR 864.7750 and under FDA product code GJS.

UNSPSC 41131728 Prothrombin time test is a Commodity code that, based on recent state and local solicitations, does not map to a coherent procurement category in practice. The code's nominal scope—prothrombin time blood-clotting assays—bears no relationship to the drug testing, forensic laboratory, occupational health, and specimen collection services that dominate recent opportunities tagged under this code. State and local buyers posting under 41131728 are actually procuring drug screening panels (immunoassay and confirmatory testing via LC/MS/MS or GC/MS), urinalysis testing, forensic reference materials and assay kits for controlled-substance analysis, occupational medical services including pre-employment physicals and fitness-for-duty evaluations, and collection-kit supplies for law enforcement and treatment-court programs. The issuing bodies span county community supervision departments, county health services and forensic laboratories, city public-safety and human-resources functions, state public-health and criminal-justice agencies, and county treatment courts across multiple states.

Recent activity clusters in Texas, Florida, Georgia, Oregon, Wisconsin, and North Carolina, with Collin County, Texas appearing twice. Representative solicitations include Collin County Community Supervision and Corrections Department's RFP 2026-327 for offender specimen collection and drug testing services (approximately 25,031 annual tests; $600,000 estimated value; responses due July 23, 2026), the Texas Comptroller of Public Accounts' IFB 304T-27-175A1.1 for proprietary forensic laboratory equipment and drug-screening consumables serving the Department of Public Safety statewide (responses due October 20, 2026), Gwinnett County, Georgia's RFQ for drugs-of-abuse analyzer testing supplies (responses due October 14, 2026), Benton County, Oregon's RFQ for urinalysis testing services for a family treatment court (responses due July 7, 2026), and Pinellas County, Florida's ITQ 26-0305-ITQ for certified reference drug standards supporting forensic toxicology operations (responses due April 23, 2026). The code exhibits significant misalignment between its nominal definition and actual procurement activity; vendors pursuing under this code should verify scope alignment in each RFP or RFQ to confirm relevance.