In a story Friday on the National Institutes of Health, several names of those reported to be under serious consideration for the post of director were inadvertently omitted. They include Drs. Eugene Braunwald, a Harvard professor of medicine; Julius Krevans, medical school dean at the University of Claifornia. San Francisco, and James Wyngaarden of Duke University Medical School, as well as pharmaceutical executives W. Clarke Wescoe, formerly of the University of Kansas, and Theodore Cooper, who previously held several top government health posts.

Doctors at the National Institutes of Health, worried about Reagan administration budget cuts, were told by a Democratic veteran of budget wars yesterday to "hunker down" until the slashes of this "fleeting moment" are ended and future congresses surely come to their rescue.

The hardly unpolitical message came from former Washington senator Warren G. Magnuson, powerful dispenser of billions of health-research dollars until his defeat last November. The occasion was the rededication of NIH's big clinical center and research hospital as the Warren Grant Magnuson Center plus the dedication of a new $100 million addition for out-patient care.

Magnuson's message had to be read for him. The 76-year-old former lawmaker said he could not attend the dedication for "personal reasons." A former aide said he is well but had just moved from one Seattle home to another, which seemed to be "enough activity" now.

The dedication's main speaker, Health and Human Services Secretary Richard S. Schweiker, praised Magnuson as "commander in chief" in the war against cancer and heart disease during his many years as virtual ruler of Senate health appropriations.

President Reagan has called for a 12 percent cutback in all federal spending, but some observers think Congress will spare NIH at least part of the ax. NIH is currently operating on a continuing resolution which prolongs its fiscal 1981 appropriation level of $3.6 billion until Nov. 20.

Schweiker did not mention appropriations, but said only that "both President Reagan and I are committed" to maintaining NIH as "a unique national enterprise."

NIH also has other concerns. It has been without a director since the unexpected resignation of Dr. Donald Fredrickson last July; five of its 11 institutes either lack or will soon lack directors, and several other key jobs are open. All the lesser jobs await selection of a new director to fill Fredrickson's post as chief dispenser of research dollars to the entire American medical community.

Schweiker told a reporter yesterday he has just received a short list of nominees and he hopes to send a nomination to the White House "within a couple of weeks," with a director on board by the first of the year.

The list was chosen by a committee under Dr. Edward Brandt Jr., HHS assistant secretary for health, who said yesterday that more than 100 names had been received.

HHS, Capitol Hill and scientific sources say these doctors are among those who have been under serious consideration:

Dr. Richard Krausse, head of the National Institute of Allergy and Infectious Diseases, an inside NIH favorite; Dr. Baruj Benacerraf, a Harvard Nobel Prize winner; Dr. William Danforth, of the Washington University Medical School, who is a brother of Sen. John Danforth (R-Mo.). A top department official said, however, that Danforth has pulled himself out of the running.