More than 15.3 million Americans have signed up for health insurance under the Affordable Care Act (ACA) for 2024, a 33% increase from this time last year, according to data released by the Centers for Medicare & Medicaid Services on Wednesday. The Biden-Harris Administration said preliminary data also projects that over 19 million people will enroll in 2024 through the ACA marketplace. The deadline for enrollment is January 16, 2024