AMCP Market Insights: Managed care considerations in Barth syndrome.

Barth syndrome is an ultrarare, complex, multisystem, X-linked metabolic and neuromuscular disease, which poses significant and wide-ranging burden to patients and caregivers. Pharmacologic management focuses on treatment of disease manifestations and prevention of secondary complications. Elamipretide, the first treatment indicated specifically for improving muscle strength in Barth syndrome, was approved in 2025 via accelerated approval warranting guidance for payers. To discuss managed care considerations in Barth syndrome including management of elamipretide, AMCP Market Insights virtually convened an expert panel of managed care stakeholders in March 2026. This article provides a qualitative summary of the panel discussion along with key insights and suggested payer practices meant to support informed coverage decisions and guide future work such as collaboration, research, and advocacy. Key insights highlight that there are unique challenges in generating clinical trial evidence for treatments in ultrarare conditions, which leads to difficulties determining the value of these treatments and differences in whether they are covered among payers. Additionally, there are numerous elements of care to which patients with Barth syndrome and their caregivers need equitable access, which is complicated by involving multiple specialists and fragmentation. Suggested payer practices involve education, care delivery, and coverage and benefit design.