As the presidential candidates spar over health reform proposals, a new analysis of eight different Democratic reform models found they would cover from 11 million to 35 million more Americans while costing the federal government from $590 billion to $34 trillion over 10 years.

House Democratic leaders are adjusting their signature bill to lower drug prices in an effort to address progressive concerns that a previous version of it was not strong enough.

A day after they sparred in a Democratic presidential debate, Mr. Biden aimed more criticism at Ms. Warren, who has joined him as a front-runner.

As the public debate on health reform rolls on, a new report from Moody’s Investors Service analyzes how these different approaches could impact insurers’ bottom lines.

The top Republican on the House Ways and Means Committee on Wednesday rejected a proposal from the Democratic chairman of the panel to protect patients from surprise medical bills, saying a different approach is needed to solve the problem.

A new state law going into effect Jan. 1 requires Californians to have health insurance in 2020 or face a penalty on their state taxes.