
Candace Natoli
Executive Director
View Bio PageHow our evaluation of CMS's prior authorization model saved $1 billion and protected patient care in non-emergency ambulance transport
We found no negative impact on care access or quality, highlighting the demonstration’s success in reducing improper use while maintaining positive patient outcomes.
CMS needed to curb the overuse of non-emergency ambulance rides—a source of avoidable expenses that were driving up Medicare costs—while preserving access to medically necessary transport.
We brought together evaluation, program integrity, clinical, and Medicare transportation experts to measure the impact of CMS's prior authorization model for non-emergency ambulance use. Our analysis examined effects on spending, service quality, and program integrity—using data from across a number of states.
Our multi-year evaluation helped achieve significant cost savings while safeguarding patient care. By analyzing Medicare claims, we showed that reduced spending on unnecessary non-emergency ambulance services would not compromise the well-being of Medicare beneficiaries. We found no negative impact on care access or quality, highlighting the demonstration’s success in reducing improper use while maintaining positive patient outcomes.
Key findings at a glance
CMS’s model shows that smarter oversight reduces unnecessary spending while protecting patients. These findings support better, data-driven policies that generate substantial cost savings.
Mathematica provided recommendations to the Centers for Medicare & Medicaid Services for improving hospital price transparency compliance and enforcement processes to ensure that the pricing information publicly disclosed by hospitals is accurate and complete.
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