An analysis of Senate Majority Leader Bill Frist's voting record shows he regularly supported bills benefiting HCA, the Nashville-based hospital company that's been the foundation of the Frist family's wealth.

Frist's office has said in the past that his connections to HCA have not influenced his actions in the Senate, but the research shows that over nearly 11 years in the Senate, Frist (R-TN) has regularly supported bills friendly to HCA and to hospitals in general.

Some of that can be attributed to following a Republican party line that favors big business. But some critics suggest that Frist, currently under investigation regarding the sale of his HCA stock, should be prohibited from voting on bills that could affect the fortunes of his family.

"Because he owned so much stock in HCA ... there is the appearance that any legislation that could help the company would have helped him financially," Mike Surrusco, ethics director for Common Cause, a nonpartisan watchdog group, told the Washington Post.

The Senate Ethics Committee, in 1997 and 1999, said that Frist's financial interest in HCA didn't present a conflict of interest when it came to voting on health-care issues. But in light of current investigations from the Securities and Exchange Commission and the New York Attorney General's office, the Senate committee may ultimately be asked to take a fresh look at the issue.

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The analysis of Frist's Senate career found multiple times when the Tennessee Republican introduced legislation friendly to HCA's interests.

For example, in July, Frist introduced a bill to help insure the uninsured and limit jury awards. HCA set aside a whopping $2.7 billion in 2004 to cover expected lost revenue d uue to ninsured patients not paying their bills. And an HCA subsidiary, Health Care Indemnity, is one of the country's largest providers of medical-malpractice insurance, and as a result would benefit from limits on hefty jury awards.

Other bills supported by Frist have given hospitals more money for treating seniors and have curbed development of physician-owned specialty hospitals that compete with HCA.

Several years ago, the Tennessee Republican fought a Democratic-sponsored version of a "patients' bill of rights" that would have allowed patients to sue their HMOs and collect unlimited damages. Physician groups such as the American Medical Association supported the bill, but Frist argued that it would do more to help trial lawyers than it would to help patients.

Had the bill become law, the added cost of the jury awards could have put financial pressure on health plans to reduce their payments to hospital companies like HCA. HMOs and other insurance plans accounted for 42 percent of HCA's revenue in 2001, the year the patients' bill of rights came up for a vote.