Did the OGUK Medical at Bumrungrad Bangkok the other day. Cost 8115 Baht.
Best to make an appointment, but if you donโt, can just turn up 6 days a week Mon-Sat. Arrive before 10am so you can get it same day, as Doc finishes clinic at 1pm.
Registration at 10th floor of "International Clinic", then up to 16th Floor to Station D and tell you want to do a Oil & Gas UK Medical with Dr. Vatana.
Medical involves; Eyes, blood press, BMI, Doc check-up & form filling, chest x-ray, lung-function, audio, urine tests.
Staff all courteous, speak English and take you from lab test to test. Excellent modern and efficient hospital.
About 2 hours from registration (bring passport) to cert.