Are pre-existing conditions covered under the ACA?

What the government has said, on the record

Here's how a federal official described it, on the record:

“Tens of millions of Americans can no longer be discriminated against due to pre-existing conditions like cancer, asthma, or diabetes.”

— Chiquita Brooks-LaSure, Administrator, Centers for Medicare & Medicaid Services (CMS), CMS Administrator statement on the Supreme Court decision upholding the ACA (California v. Texas), 2021-06-17 (source)

Editor's note: From the CMS Administrator's June 2021 statement issued after the Supreme Court upheld the ACA. The ACA's prohibition on denying coverage or charging more because of a pre-existing condition remains in effect.