What is the best way is for an American to get the tests for the 5-year visa?
When I mention it to doctors they usually laugh. [Must NOT have prohibitive diseases (Leprosy, Tuberculosis, drug addiction, Elephantiasis, third phase of Syphilis)].
TLDR : Answer Summary
Obtaining the necessary medical tests for a 5-year Thai visa can be challenging for Americans. Key steps include finding a doctor or clinic willing to sign the required medical form. Many individuals report success with their regular physicians, but some face hurdles, such as excessive testing or reluctance from healthcare providers. Low-cost health clinics specializing in immigrant health services may offer a viable option. Moreover, for most prohibitive diseases, a doctor's observation is often sufficient, and not all tests are mandated; however, a blood test for tertiary syphilis might be necessary. Ultimately, each case may vary, and shopping around for the right provider is often recommended.