Peter Lamelas

Peter Lamelas (born December 1958) is a Cuban-American diplomat, physician, and entrepreneur who has served as the United States ambassador to Argentina since 2025. He is a major donor to the Republican Party donating over $600,000 to Republicans in the 2024 United States presidential election. Lamelas is also the founder and former CEO of MD Now Urgent Care, an urgent care network in Florida.

Early life and education Peter Lamelas was born in Cuba and immigrated to the United States as a child with his family. Lamelas pursued higher education in medicine, earning an M.D. from Universidad Central del Este and later completing an M.B.A. at Nova Southeastern University.

During his confirmation hearing in July 2025, Lamelas explained that his objectives were to make Argentina a “partner of choice” for the United States. In the context of the rivalry between Argentina and the United Kingdom over control of the Falkland Islands, he reiterated the “neutrality” of the United States on this issue. Lamelas confirmed his intention to combat the influence of certain countries in Argentina, such as China and Venezuela. He also announced his support for the judicial proceedings against former President Cristina Fernández de Kirchner.

On September 18, 2025, Lamelas was confirmed by the Senate.