For the last 10 years or so I've used Dr. Donna at MedConsult Asia for my work permit medical certificate. I've never done the blood test and it has never been an issue. Recently I have read reports that the Bangkok labor office is requiring it of all applicants. Any recent reports from people who did not submit the form? My work permit is from Thammasat, a public university, so maybe that has made a difference?
I know for years many have insisted the blood test is an absolute requirement and that the form must come from a hospital and not a clinic, but that has not been my experience., so far anyway......