How do I apply for a DTV visa on medical grounds as a foreigner in Thailand?

Go and make an appointment with a doctor here whilst you are in Thailand and explain your medical situation and what you are hoping to put in place for ongoing monitoring/treatment for your condition. They will either refer you to a suitable consultant or make a treatment plan for you at the clinic. You will need a letter from the GP or consultant (headed paper) saying you have been appraised and that you will be returning to Thailand to treat an ongoing condition. In addition to that, make some provisional appointments for treatment for roughly when you intend to return (I made 12 over a three month period, one per week) and have the clinic print them out for you on headed paper. I applied through the UK Embassy whilst I was home in the UK and got my DVT approved about 14 days after I submitted all the documents. Hope that helps. Good luck. 😊

Go for soft power option.

I agree with Anonymous participant 205. My wife was also advised to have the letter include at least 6 months of appointments to show a long-term plan. Hers is under ongoing hormone replacement therapy. Approved Feb. 2025.

They would like to see your commitment to a long-term treatment plan, backed by a recognised hospital, clinic, or doctor here in Thailand. You would need to come here first to choose what best suits you, or contact them from where you are (if accepted by the hospital/embassy).