Payer and Implementation Challenges with Advanced Therapy Medicinal Products (ATMPs).

Advanced therapy medicinal products (ATMPs) are a dynamic and current topic for healthcare systems, with new products progressing to market at an increasing rate. ATMPs highlight the growing gap between payer and regulator requirements; the limited evidence base combined with pressure to implement rapidly is exacerbating the clinical and financial uncertainties associated with these products. There are a number of key uncertainties with ATMPs related to implementation and healthcare planning-these uncertainties at the time of evaluation have the ability to change the value proposition of products. ATMPs also have the potential to reduce the amount of net health gain available to healthcare systems, and evaluators should consider the opportunity cost when seeking to accelerate access to one-off therapies with a limited clinical evidence base. Therefore, ATMPs have the potential to transform clinical care pathways, but implementation challenges and application of key health economic principles may highlight the requirement to exercise caution.