A new change effective October 9, 2019, is allowing companies under the Board of Investment (BOI),

Industrial Estate Authority of Thailand (IEAT) or Department of Mineral Fuels (DMF) to submit work permit applications for foreign employees without a medical certificate.
Companies under BOI, IEAT or DMF applying for new work permits and work permit renewals will now be able to save time and costs as their foreign employees

will not have to undergo a medical check-up. However, processing times will likely remain the same.