Senator Lindsey Graham (C), R-SC, stands with Senator Bill Cassidy, R-LA, Senator Dean Heller (L), and Senator Ron Johnson, R-WI, as well as former Senator Rick Santorum (R), to announce their legislation to repeal and replace Obamacare through block grants on Capitol Hill in Washington, DC, on September 13, 2017.   / AFP PHOTO / JIM WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)
PHOTO: JIM WATSON/AFP/AFP/Getty Images
Senator Lindsey Graham (C), R-SC, stands with Senator Bill Cassidy, R-LA, Senator Dean Heller (L), and Senator Ron Johnson, R-WI, as well as former Senator Rick Santorum (R), to announce their legislation to repeal and replace Obamacare through block grants on Capitol Hill in Washington, DC, on September 13, 2017. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
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Sens. Bill Cassidy (R-La.), Lindsey Graham (R-S.C.), Amy Klobuchar (D-Minn.), and Bernie Sanders (I-Vt.) speak at a CNN townhall debate on healthcare at the CNN headquarters in Washington, D.C. on Sept. 25, 2017. 

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(CNN) —  

The Congressional Budget Office has released a partial score of the GOP’s plan to repeal Obamacare, saying the Graham-Cassidy bill would reduce the budget deficit by at least $133 billion but millions of people would lose comprehensive health insurance.

The non-partisan scoring agency estimates that between 2017 and 2026, “the legislation would reduce the on-budget deficit by at least $133 billion and result in millions fewer people with comprehensive health insurance that covers high-cost medical events.”

The report is not as detailed as previous CBO scores, however.

It does not give a more specific number of how many Americans would lose health care coverage under the health care law sponsored by Sens. Lindsey Graham of South Carolina and Bill Cassidy of Louisiana nor does it include information on how Graham-Cassidy would affect the cost of premiums throughout the country.

The agency announced weeks ago that it would not have adequate time to release coverage numbers and instead would only be able to release a “preliminary” report.

“CBO will not be able to provide point estimates of the effects on the deficit, health insurance coverage, or premiums for at least several weeks,” the agency said in a statement about the bill.

The CBO score’s main purpose is to ensure that the legislation meets its saving targets required under reconciliation, the process that allows Senate Republicans to pass the health care bill with 51 votes.

The non-partisan agency’s score is also of the first version of the bill. Changes were made to the legislation over the weekend and released Sunday night. Those tweaks include a recalculation of how much money rural states would receive under Graham Cassidy as well as a further roll back on protections for people with pre-existing conditions. The CBO’s latest score does not include the changes.