What are the requirements and documents needed for the DTV medical treatment visa in Thailand?

To apply for the DTV visa under the medical treatment program, one must first undergo an assessment at a Thai hospital or clinic that is approved for DTV visas. Applicants need a detailed treatment plan that spans at least six months, including specific appointment dates. It's important to be aware that upfront payment may be required, and receipts will need to be submitted as part of the visa application process.