AIDS groups defend healthcare law

"I am deeply concerned that the progress we have made against this devastating disease is in danger of being reversed," said Rep. Maxine Waters (D-Calif.). Repealing the healthcare law would allow insurance companies to deny people coverage because they have HIV or AIDS, she said.

Lawmakers also said cuts to other healthcare programs, including Medicaid, would be damaging.

The Obama administration told state Medicaid agencies in 2009 that they could receive federal funding for population-based testing. Jeff Crowley, of the White House Office of National AIDS Policy, told the The Hill he was not sure how many states have taken advantage.