Does any of your collaborating MD/ delegating physician refuse for you to get DEA number and why? Ex: How do you go about an RX for a Controlled 3/4/5 that they want you to sign and say it is authorized by them yet..this is not even my collaborating md but they say "if this Rx is signed by x, x , or x (which are NP in the group practice) it is authorized by the MD. Example adipex for a diet center or ambien for sleep? Looking for help!!!