National Comprehensive Cancer Network



NCCN Compendium®
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NCCN Compendium® Chapters By Disease
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Transparency: Process and Recommendations
No Longer Recommended Uses
JNCCN — Journal of the National Comprehensive Cancer Network

NCCN Guidelines® & Clinical Resources

NCCN Categories of Evidence and Consensus

  • Category 1: Based upon high-level evidence, there is uniform NCCN consensus that the intervention is appropriate.
  • Category 2A: Based upon lower-level evidence, there is uniform NCCN consensus that the intervention is appropriate.
  • Category 2B: Based upon lower-level evidence, there is NCCN consensus that the intervention is appropriate.
  • Category 3: Based upon any level of evidence, there is major NCCN disagreement that the intervention is appropriate.

All recommendations are category 2A unless otherwise noted.