G. Nicholas Rogentine Jr., 67, former chief of internal medicine and associate medical director at Kaiser Permanente, died May 24 in Bethesda. He committed suicide, the family said.

Dr. Rogentine had a type of Lou Gehrig's disease that caused dementia and severe depression, said his wife, Carole E. Rogentine. He was a resident of Bethesda.

He was born in Minneapolis and grew up in Owatonna and Jackson, Minn. He attended Harvard College in Cambridge, Mass., on an academic scholarship and graduated summa cum laude in 1958. He was elected to Phi Beta Kappa. He graduated first in his class from the University of Minnesota Medical School in Minneapolis in 1962.

Dr. Rogentine served his residency at Massachusetts General Hospital in Boston. From 1964 to 1978, he was a clinical associate and then a senior investigator on the research staff at the National Cancer Institute of the National Institutes of Health in Bethesda. From 1978 through 2002, he was on the staff of Kaiser Permanente in Bethesda.

Dr. Rogentine played the bagpipes, recorder and saxophone. He traveled throughout the world and enjoyed reading, hiking and cross-country skiing.

Survivors include his wife, of Bethesda, two daughters, Sarah Rogentine Ripepi of Pittsburgh and Kristin Rogentine Lee of Charlotte; a sister; and six grandchildren.