Ida L. Hellman, 74, a medical writer and consultant who formerly worked for the Army, the National Institutes of Health and the Social Security Administration, died June 9 at Georgetown University Hospital. She had a stroke.

Mrs. Hellman, who was born in Jersey City, N.J., had lived in Washington since 1941. She graduated from Hunter College in New York and earned a master's degree in bacteriology at Johns Hopkins University. She also studied biostatistics at the University of Minnesota.

From 1954 to 1960, she was a medical writer for the Army. She then joined the National Institutes of Health, where she was a medical writer and public health analyst until 1968. For the next three years, she was a statistician at the Social Security Administration and then returned to NIH. Since 1973, when she retired from NIH, she had been a private consultant and medical writer.

Mrs. Hellman was a founding member of the Washington Society for the History of Medicine, the president of the Sisterhood at Adas Israel Congregation and a member of the Georgetown Synagogue-Kesher Israel Congregation, the Women's American Ort, Technion and Hadassah.

Survivors include her husband, Dr. Louis P., of Washington; two children, Carolyn F., of Washington, and Dr. John R., of Seattle; a brother, Albert Levin of Deerfield Beach, Fla., and two grandchildren.