WASHINGTON — After weeks of secretive talks, a bipartisan group in the Senate edged closer Monday to a health care compromise that omits two key Democratic priorities but incorporates provisions to slow the explosive rise in medical costs, officials said.

These officials said participants were on track to exclude a requirement many congressional Democrats seek for large businesses to offer coverage to their workers. Nor would there be a provision for a government insurance option, despite President Barack Obama's support for such a plan.

The three Democrats and three Republicans from the Senate Finance Committee were considering a tax of as much as 35 percent on very high-cost insurance policies, part of an attempt to rein in rapid escalation of costs. Also likely to be included in any deal was creation of a commission charged with slowing the growth of Medicare through recommendations that would take effect automatically unless overturned by Congress.