I am a little unsure how to handle these.

I have 1 paid medical collection that I paid to the CA.

I also have many others that are unpaid that I would like to start working on.

How do I go about these?

Thanks!

How old are these collections??

You start by opting out
http://whychat.5u.com/OPTOUTINST.HTML
Get old addresses deleted if possible

Send each CRA this, use an individual report and follow ALL the instructions.
http://whychat.5u.com/hipaadisp.html

Post back here ON THIS THREAD with further questions