The University of California at Los Angeles Medical Center in 2001 extended its run as the most active U.S. transplant center, becoming the first program to ever perform 600 organ transplants in a single year.

The University of Maryland remained the nation's second most active program, but while the UCLA total was up by 41 in 2001, the Maryland total dropped by 46 to 474 transplants.

The University of Miami Jackson Memorial transplant program grew by more than 20 percent in 2001, and was the nation's third most active with 464 organ transplants.

The University of Minnesota-Fairview program with 456 and the University of Wisconsin transplant program with 453 rounded out the five most active.

While there are some 270 accredited U.S. transplant centers, the five most active programs accounted for more than 10 percent of all the organ transplants performed during the past year in the United States.

Broken down by organ:

Kidney: For the second year, the University of Maryland performed the most kidney transplants with 384, followed in order by the University of Alabama, UCLA, St. Vincent Medical Center in Los Angeles, and the University of Wisconsin.

Kidney-Pancreas: As it has for a number of years, the University of Wisconsin performed the most kidney-pancreas transplants with 52, followed by the University of Minnesota, Emory University and the University of Miami.

Pancreas: Once again, the University of Minnesota performed by far the most pancreas transplants with 109, followed by the University of Maryland, the Mayo Clinic and the University of Miami.

Liver: UCLA again performed the most liver transplants with 204, closely followed by the University of Miami, Mount Sinai Medical Center, St. Luke's/Mayo Clinic in Jacksonville, FL, and Strong Memorial Hospital in Rochester, NY.

Heart: The Presbyterian Hospital in New York performed the most heart transplants with 106, followed by UCLA, the Cleveland Clinic, Duke, and Tampa General Hospital.

Lung: Duke University performed the most lung transplants with 65, followed by Barnes-Jewish Hospital in St. Louis, University of Pittsburgh, the University of Colorado, and the University of Minnesota.

Heart-Lung: Stanford again performed the most heart-lung transplants, this year with only 4, and Arizona with 3 was the only other center that performed more than 2 of these complex transplants.

Intestines: The University of Miami, which has been the leader in this newest transplant to be covered by Medicare, again performed the most intestinal transplants with 36. The University of Pittsburgh, Mount Sinai and Nebraska were the only other centers to perform significant numbers of these transplants.

For detailed information on the number of transplants performed by U.S. transplant centers, please see the detailed data for 2001 in the Guide to Centers.

Other sources: UNOS Data