The House health care bill up for a vote on Thursday would roll back the Affordable Care Act’s expansion of Medicaid, eliminate tax penalties for people who do not have health insurance and end taxes on certain high-income people, insurers, drug companies and manufacturers of medical devices to finance the current health law.

Here is a summary of major provisions of the House bill, the American Health Care Act.

■ To help people buy insurance, if they do not have coverage at work or under a government program like Medicare or Medicaid, or through the Department of Veterans Affairs, the bill would offer $2,000 to $4,000 a year in tax credits, depending mainly on age. A family could receive up to $14,000 a year in credits. The credits would be reduced for individuals making over $75,000 a year and families making over $150,000.

■ Under current rules, insurers cannot charge older adults more than three times what they charge young adults for the same coverage. The House bill would allow them to charge five times as much. The Congressional Budget Office said this change would reduce premiums for young adults and increase premiums for older Americans.

■ The bill would end Medicaid as an open-ended entitlement to health care and would put the program on a budget. States would receive an allotment of federal money for each beneficiary, or, as an alternative, they could take the money in a lump sum as a block grant, with fewer federal requirements. Medicaid cuts would total $880 billion over 10 years.