I certainly think you should find another onc. Did he say why you wouldn't be having tumor marker tests or ct scans? Did you have any lymph node involvement? Maybe because you aren't having chemo he doesn't think these things are necessary but I know that I wouldn't feel comfortable with that.
If you're not comfortable with it, find someone else. I think that SOMEONE should be monitoring you. Let us know what you decide.
A good friend will bail you out of jail...
but a true friend will be sitting
next to you saying,
"Dâmn... that was fun!".