Can an appointment letter from Bumrungrad Hospital serve as proof for DTV visa application?

The consensus in the comments is that a simple appointment letter from Bumrungrad Hospital for a health check is generally insufficient as proof for a DTV visa application. Stronger documentation, including a detailed doctor's report, treatment plan, and evidence of ongoing treatment over several months, is typically required for approval. Some users noted that while certain consulates may have previously accepted less documentation, the requirements have become stricter recently, necessitating comprehensive medical records.