The Affordable Care Act Federal Upper Limit — or ACA FUL — is a drug pricing benchmark based on a new formula detailed in the Affordable Care Act. ACA FUL will be included among a variety of commonly consulted drug pricing benchmarks. They are derived from various methods and represent nuanced different assessments for comparison, analysis, and decisions related to reimbursement and product positioning.
Further reading –
https://www.medicaid.gov/medicaid/prescription-drugs/federal-upper-limits/index.html