WASHINGTON — Democratic lawmakers on Wednesday canceled a hearing called to field concerns from AT&T and other corporations about new employer costs in the health care overhaul, saying the companies now believe the overhaul could ease their costs if implemented properly.

AT&T, Caterpillar, AK Steel and other companies said last month they would be forced to take billions of dollars in writedowns because of changes in how health care subsidies will be taxed.

But Energy and Commerce Committee Chairman Henry Waxman, D-Calif., issued a statement late Wednesday, saying he canceled a hearing scheduled for next Wednesday at the request of several companies that want more time to see how the law is implemented.