Hospitals across the country have geared up to publish online price lists for all the medical services they provide, as a federal law takes effect on January 1.

The new law, which was announced in April, should also make it easier for patients to get access to their medical records, according to officials.

Currently, under the Affordable Care Act, hospitals must release public price lists, but from the start of 2019 they will be required to post these prices online in a format that can be downloaded to computers. These prices must be updated every year.

The changes also apply to rehabilitation facilities, psychiatric hospitals and critical access hospitals.

There is some concern that the price lists could cause confusion, according to health care business news website Modern Healthcare. The prices on a hospital’s website may not match those paid by their insurance provider, or Medicare. The website also highlighted that some not-for-profit hospitals calculate their rates according to a patient’s income.