The Self-Insurance Protection Act clarifies that stop-loss insurance purchased by employers who self-fund their employee health plans should not be considered health insurance coverage under federal law. Stop-loss insurance protects employers against unexpectedly high medical claims costs by reimbursing them when claims exceed a predetermined amount, but it doesn't directly pay healthcare providers or insure employees themselves. The bill affects employers of all sizes who choose to self-fund their health benefits rather than purchase traditional insurance, and it prevents states from blocking these employers from obtaining stop-loss coverage. The legislation aims to preserve employers' ability to manage financial risk while maintaining their self-funded health plans, which are already regulated under federal retirement and benefits law. No specific funding amounts or implementation timelines are included in the bill.