I don't know what state you're in, but in Texas, we have a new procedure for claiming a religious/philosophical exemption. You have to request exemption forms from the state Department of Health. They come with the child's name and birthdate. When you receive them (you can request up to 5), you sign and have one notarized (just one because each one is good for only a certain amount of time from the date of signature).
The primary purpose of these is for school admission, but I have them for my daughter (and will order them as soon as the next baby is born) so that in the event that we are in an ER situation or something and are questioned about vax status (ped is not an issue -- she is supportive, and we don't see her anyway), we will have it to show the dr.
This probably won't change your doctor's decision on whether he will see you or not (as far as I know, there is nothing preventing a doctor from refusing to see your child based on vax status, but I could be wrong), but if your state has a similar procedure and you go in with the exemption form in hand, it might make him less likely to lecture/pressure you.
Even if your state doesn't have a standard form, you can prepare a form yourself and have it notarized to show that you mean business. Check out the PROVE website (sorry, don't have the link handy) for suggested language for your state.