(Adds details on subsequent Trump tweet)
WASHINGTON, July 29 (Reuters) - U.S. President Donald Trump threatened on Saturday to end government payments to health insurers if Congress does not pass a new healthcare bill and goaded them to not abandon their seven-year quest to replace the Obamacare law.
In a Twitter message on Saturday, Trump said "if a new HealthCare Bill is not approved quickly, BAILOUTS for Insurance Companies and BAILOUTS for Members of Congress will end very soon!"
The tweet came a day after Senate Republicans failed to muster enough votes to repeal parts of the Affordable Care Act, President Barack Obama's signature healthcare bill commonly known as Obamacare.
The first part of Trump's tweet appeared to be referring to the approximately $8 billion in cost-sharing reduction subsidies the federal government pays to insurers to lower the price of health coverage for low-income Americans.
The second part of the tweet appeared to be a threat to end the employer contribution for members of Congress and their staffs, who were moved from the normal federal employee healthcare benefits program onto the Obamacare insurance exchanges as part of the 2010 healthcare law.
Trump later urged Senate Republicans to try again on a healthcare vote. The Senate is in session for another week before it is scheduled to begin an August recess.
"Unless the Republican Senators are total quitters, Repeal & Replace is not dead! Demand another vote before voting on any other bill!" Trump said in a subsequent tweet.
Many insurers have been waiting for an answer from Trump or lawmakers on whether they will continue to fund the annual government subsidies. Without assurances, many insurers plan to raise rates an additional 20 percent by an Aug. 16 deadline for premium prices.
With Republican efforts to dismantle Obamacare in disarray, hundreds of U.S. counties are at risk of losing access to private health coverage in 2018 as insurers consider pulling out of those markets.
In response, Trump on Friday again suggested that his administration would let the Obamacare program implode. He has weakened enforcement of the laws requirement for individuals to buy insurance, threatened to cut off funding and sought to change plan benefits through regulations.
Meanwhile, some congressional Republicans were still trying to find a way forward on healthcare.
Senator Lindsey Graham said in a statement issued late on Friday that he and two other Republican senators, Dean Heller and Bill Cassidy, had met with Trump after the defeat to discuss Graham's proposal to take tax money raised by Obamacare and send it back to the states in the form of healthcare block grants.
Graham said the move would end Democrats' drive for a national single-payer healthcare system by putting states in charge.
"President Trump was optimistic about the Graham-Cassidy-Heller proposal," Graham added. "I will continue to work with President Trump and his team to move the idea forward." (Additional reporting by David Lawder in Washington; Editing by Matthew Lewis and Jonathan Oatis)