Maybe there is no answer to this… to get a medical DTV you need a doctors approval of some sort. Assume you have a legit issue for the visa, how is a doctor in thailand supposed to know it’s legit and can therefore sign the letter? Am I understanding right when i say the doctors letter almost necessitates a visit to thailand? So youd see the doctor, hed confirm your condition and that perhaps you need minimum say 6 months of appointments.