More than mammals? I'd say not. But then again, snakes are a lot less complicated than mammals and don't have to worry about things like hip displacement.

There are a couple of morph lines that have known genetic issues such as kinking and (apparent) neurological issues...but compared to the number of different morphs and combinations of morphs, I'd say the incidents of such issues are far, far less common than you see in mammals. For either though, I'd say the truly good breeders are the ones who take great care to minimize debilitating genetic faults.