Isadore Levin, 98, a physician specializing in physical therapy and rehabilitation who was chief of physical medicine at Doctors Hospital in Washington from its opening in 1940 to its closing in 1979, died Jan. 17 at a nursing home in Boston. He had bronchitis.

Dr. Levin was a consultant in physical medicine at St. Elizabeths Hospital from 1937 to 1945. From 1948 to 1954, Dr. Levin was chief of the physical medicine department at Georgetown University Hospital and an associate professor at Georgetown University medical school. From 1967 to 1977, he was chief of physical medicine at Suburban Hospital.

He was a Chevy Chase resident before moving to the Boston area in 1984. At his death, he lived in Brighton, Mass.

He was born in Russia and grew up in the Washington area. He graduated from the old Central High School. He was a graduate of George Washington University and a 1929 graduate of its medical school.

He was in private practice in Washington before joining the staff at Doctors Hospital.

He received a patent for a flushing bedpan.

His memberships included the Masons and Congregation Har Tzeon-Agudath Achim in Silver Spring.

His wife of 49 years, Miriam Kaplan Levin, died in 1982.

Survivors include two children, Joan Ecklein of Newton, Mass., and Sidney Levin of Acton, Mass.; a sister, Anne Footer of Rockville; four grandchildren; and a great-grandson.