ACA / Obamacare não se aplica a turistas. A melhor explicação que encontrei (isenção de responsabilidade: é de um revendedor de seguros ):
Visitors to the USA do not have access to health care while in the USA for the simple fact that they are not U.S. citizens. Even if you have family - perhaps a son or daughter, or parents - who are U.S. citizens, every visitor to America is considered a tourist and medical care for tourists is not free.
Only U.S. citizens and certain lawfully presented permanent residents (green card holders) qualify for federal health insurance program also known as Affordable Care Act or Obama Care in the US and visitors to the U.S. are responsible for paying for their own medical care.
No entanto, o site do governo dos EUA apóia isso, com viajantes e turistas em lugar nenhum na lista deles de pessoas qualificadas para cobertura .