Let me preface this saying my GP hasn't faced a BasicMed request prior to my recent yearly physical. She denied approving my medical based on Commercial Driver Licensing requirements, she says, do not permit use of a CPAP and "if DOT denies a CDL, I certainly don't believe FAA would allow a pilot to use CPAP." I will be visiting an AME after this in hopes of finally acquiring my PPL. My question is: have any other aspiring aviators run into this situation? Is it a matter of an uninformed or inexperienced doctor not familiar with regs/laws, etc. or is she correct to deny approval for CPAP use?