Formulary restrictions and health outcomes: A case study in multiple sclerosis

How does formulary restrictions impact health outcomes for patients with multiple sclerosis (MS)? To answer this question, Blaylock, Van Nuys and Joyce (2025) use data 100% Medicare claims data from 2018-2022 covering patients with both prescription drug plans (PDPs) and Medicare Advantage Prescription Drug plans (MA-PDs). Individuals were categorized as above vs. below average formulary…

Impact of Medicare Part B on pharmaceutical price growth

Does Medicare Part B increase or decrease the prices of physician-administered drugs relative to physician-administered drugs covered by private insurance? That is the question a paper by Acquatella, Ericson and Starc (2023) aim to answer. Before we answer that question, we first need to understand how Part B works, how physicians are reimbursed, and how…

How does hospital participation in a Medicare Advantage preferred network impact commercial reimbursement?

How does a hospital’s participation in a health plan’s Medicare Advantage (MA) provider network impact their commercial rates? Since many insurers offer both MA plans and commercial plans, there could be spillovers with respect to negotiating. How would MA network participation impact commercial rates? Marr et al. (2025) offers some hypotheses: On the one hand,…

Quantifying the Impact of Medicaid Expansion

How did Medicaid expansion under the Affordable Care Act impact health insurance coverage, cost and mental health? That is the question asked by Andreyeva, Rochford and Marthey (2025). They use 2011-2019 data from the Behavioral Risk Factor Surveillance System (BRFSS) to examine outcomes for Americans aged 26–54 with at least one child living in the…

What will be DOGE’s impact on CMS?

In a statement today, CMS confirmed that Elon Musk and the Department of Government Efficiency (DOGE) has been given access to CMS payment systems: CMS has two senior Agency veterans – one focused on policy and one focused on operations – who are leading the collaboration with DOGE, including ensuring appropriate access to CMS systems…