Dr Janjan has served on many national panels to develop standards of care for quality assurance including, the Agency for Healthcare Quality, National Comprehensive Cancer Network, the National Quality Forum, American Society of Clinical Oncology [ASCO], the American College of Radiology, and the International Atomic Energy Agency in Vienna.

Government service includes appointment to the Medicare Coverage Advisory Committee, consultant to the US Nuclear Regulatory Commission, the Institute for Clinical and Economic Research, reviewer for the NCI Community Clinical Oncology Program.