Once I find an actual Chameleon experienced vet I would go for a wellness check so the are familiar with the animal. I think what happens quite a bit is the lack of qualified Cham vets, people are less likely to go till there is an obvious problem.
If you can find a knowledgeable vet it is worth the wellness check. Have questions ready, get all the info you can.
I am in Portland OR , the only one I have found so far is in Seattle WA.
I might talk to my local vet and see where she stands, and maybe work together, which would definitely be a wellness check. I have done this with other exotics, some won't work with you, some are excited about it. It is one alternative if you cant find a specialist.