John L. “Jack” Chamberlain III, a lifelong Washingtonian and pediatrician in private practice for more than 33 years, died February 11, 2023. He was 92.

Dr. Chamberlain graduated from St. Albans School in Washington in 1949 and Amherst College, Amherst, MA, in 1953, where he received his A.B. degree with honors in biology. Following his undergraduate work, Dr. Chamberlain enrolled at the University of Virginia (UVA) School of Medicine where he received his Medical Degree in 1957. His four years at UVA marked the beginning of a long commitment to the Medical School. Dr. Chamberlain served as a director of the Medical School’s Advisory Board and became president of its Alumni Association. Additionally, Dr. Chamberlain served on UVA’s Medical School Foundation and on its Admission Committee.

In 1966, Dr. Chamberlain entered private practice in Washington, DC, then became a sole practitioner in Bethesda, MD, where he was a physician to thousands of young children in the Metropolitan area. In private practice for more than 30 years, Dr. Chamberlain was closely tied to Children’s Hospital National Medical Center, ultimately serving as chairman of the Medical Staff and a member of the faculty of The George Washington University School of Medicine.

Dr. Chamberlain held board positions at St. Patrick’s Episcopal School in Washington, St. Andrew’s Episcopal School in Potomac, MD, as well as his alma mater St. Albans School, where he later served on the Board of Directors and president of its Alumni Association.