The National Comprehensive Cancer Network (NCCN) is a non-profit organization that provides guidelines for the treatment of various types of cancer. The organization was founded in 1995 and is based in Plymouth Meeting, Pennsylvania. The NCCN guidelines are widely used by healthcare professionals and are considered the standard of care for cancer treatment in the United States. The organization also conducts research and provides educational resources for patients and caregivers. The NCCN is funded by member institutions, which include 30 leading cancer centers in the United States.