The "Block Organ Transplant Purchases from China Act of 2025" seeks to prohibit specific organ transplants with connections to the People's Republic of China. This legislation amends the Social Security Act, the Public Health Service Act, and the National Organ Transplant Act to implement these prohibitions. Its core purpose is to prevent U.S. healthcare systems and providers from facilitating or financially supporting organ transplants linked to practices in China that are not compliant with U.S. standards. Beginning January 1, 2026, the bill prohibits Medicare, Medicaid, and private health insurance plans from covering a "prohibited organ transplant" or any associated items and services, with an exception for life-saving post-transplant care. A prohibited organ transplant is defined as one occurring in China or involving an organ not procured through the U.S. Organ Procurement and Transplantation Network. Furthermore, the bill establishes both criminal penalties, including fines and up to two years imprisonment, and civil penalties, amounting to three times the cost of the transplant, for healthcare providers who knowingly violate these prohibitions. The Secretary of Health and Human Services is tasked with issuing rules to identify prohibited items and services and determine costs for civil penalty calculations.