Got this in my email, personally I don't think it's worth paying for it.
As of April 1, 2018 the NCCN Radiation Therapy Compendium™ will be available to registered users of NCCN.org via paid subscription only. Pricing details for individual subscriptions are listed below:
Users Price
1 – 3 $249 per user
4 – 6 $239 per user
7 – 10 $229 per user
11 – 24 $219 per user