An Iowa physician has sent the Health and Human Services Department a $294,219.94 check after he was found to have violated his agreement to serve in a medically underserved area in return for a federal scholarship to medical school.

Under a 1977 law, recipients of National Health Service Corps scholarships who breach their service agreements are liable for triple the amount they received from the government, plus interest.

The department would not identify the physician or give further details of his case, which has led to the largest repayment it has received.

In the first 11 months of fiscal 1985, the department collected $9 million from debtors under that scholarship program as part of the administration's stepped-up collection activities.

MEDICAL RESEARCH BUDGET . . . The first hints of what the federal medical research budget will look like in fiscal 1986 are emerging from Capitol Hill, and as usual it's onward and upward.

Although no decisions have been made by the House Appropriations Committee, which meets later this week, the Senate Appropriations subcommittee that handles that part of the budget, chaired by Lowell P. Weicker Jr. (R-Conn.), has completed action.

According to Weicker, the National Institutes of Health would receive $5.4 billion in fiscal 1986, $545 million more than the president's request.

That includes funds for 6,000 new and competing research grants; the administration had initially sought 5,000 grants but worked out a compromise with Weicker after a bitter fight.

Under the Senate subcommittee bill, the Centers for Disease Control would get $467.8 million in fiscal 1986, nearly $48 million over the president's request, while the Alcohol, Drug Abuse and Mental Health Administration would receive $1 billion for a variety of activities, about $98 million over the request.

Weicker also announced that the subcommittee has approved the full $127.6 million requested for AIDS research, $30 million over the amount for fiscal 1985.

"It is my firm intent," he said, "that whatever resources are needed to meet the AIDS crisis will be provided."

NEW JOB FOR DAVIS . . . Carolyne K. Davis, former chief of the Health Care Financing Administration, will divide her time around the country in her job as a health adviser to the accounting firm of Ernst and Whinney.

According to officials with the firm, Davis plans to spend about 40 percent of the time at the company's headquarters in Cleveland working on health regulatory and legislative issues and about 20 percent in the firm's offices here working on similar matters.

The rest of her time will be spent making speeches and traveling around the world visiting places in which company projects or studies are under way. The firm does over $100 million of work a year auditing the books of hospitals, nursing homes and medical groups, advising them on how to improve their efficiency and investment practices, according to a spokesman. It also does feasibility studies for companies considering entering the health care field or expanding in it.

CHILD SUPPORT ENFORCEMENT . . . The Office of Child Support Enforcement reported that in fiscal 1984 the federal-state program collected $2.4 billion in overdue child support, about 20 percent more than the previous year.

About $1 billion was collected on behalf of welfare children receiving Aid to Families with Dependent Children, while the remaining $1.4 billion was collected on behalf of children who are not on welfare. The program cost $723 million to administer; two-thirds of that was paid by the federal government and the rest by the states.

During the year, the program established the paternity of 219,360 children born out of wedlock and obtained legally enforceable support orders in 573,313 cases. Among the states, Pennsylvania had the largest collections in 1984 -- $327.7 million -- followed by Michigan at $305.4 million. In the District, collections totaled $4 million, in Maryland, $76.6 million, and in Virginia, $13.9 million