Global Rare Disease Clinical Trials Market is valued at US$ 13.5 billion in 2025, and it is expected to grow US$ 28.6 billion by 2034 with the CAGR 8.7% from 2025 to 2034. Scope of Global Rare Disease Clinical Trials Market The rare disease clinical trials market involves the ecosystem of companies, institutions, organizations, and authorities that participate in the development, management, and implementation of clinical trials in relation to rare or orphan diseases, covering all genetic, neurological, metabolic, hematology, and ultra-rare disease groups.