The U.S. Supreme Court will hear arguments on Monday challenging the constitutionality of a provision in the Affordable Care Act that requires most private health insurance plans to cover preventive care at no cost to the patient.

As Laura Barone-Lopez reports, the case could have a profound impact on the health care millions of Americans used to stay healthy and prevent disease.

Attorney and queer activist Prestam Mitchum has been taking pre-exposure prophylaxis or prep to prevent HIV every day for about a decade.

Just being able to wake up and have a peace of mind has to be the number one benefit for me about why I still take it.

Prep reduces the risk of getting HIV from sex by about 99% and from injection drug use by at least 74%.

For me, there's always going to be a benefit to understanding what you need for your body

to be healthy. I know it's really important for me to protect my body and not only my body,

my partner's bodies along the way.

The medication was first approved in 2012 and is now available in two forms.

One, two.

A shot every other month or a daily pill.

Prep and preventative care is kind of the cornerstone of what we do here at Whitman Walker.

Dr. Kyle Benda is a director of medical operations at Whitman Walker Health,

a nonprofit in Washington, D.C., that offers primary care and specializes in HIV treatment.

He credits PrEP with helping to reduce new cases of HIV in the nation's capital by 12%

from 2012 to 2021.

While our HIV treatments are amazing and life with HIV is very different than think, what a lot of folks may think of.

For the health of our population, prevention of HIV is paramount.

Still, the cost of the drug is so high that without financial help for most people like Preston Mitchum,

prep would be out of reach. When I first got the actual prescription and they rang it up,

it shot up. It was like $2,000, $2,100. I was like, there's no way I can afford this. No way.

But since 2021, because of a provision in the Affordable Care Act,

...