The Emergency Medical Treatment And Labor Act (EMTALA) is a 1986 law that requires hospitals to treat any patients that present with a life-threatening condition, regardless of their apparent ability to pay.
It specifies explicitly what must happen in certain cases, including that of a pregnant woman.
Federal law always supercedes state law, and states cannot make any laws to "block" federal law.
To wit:
The department said emergency conditions include "ectopic pregnancy, complications of pregnancy loss, or emergent hypertensive disorders, such as preeclampsia with severe features."
They CANNOT let a woman die.
UPDATE: The DOJ has brought a lawsuit against Idaho to stop their illegally strict proposed abortion limits.