@Valerie *********
Most do not offer new health coverage after age 64.
Pacific Cross offers new policies through age 74.
Passing a very thorough medical examination is required.
The cost of all of the examinations required for me was quite expensive. It likely is based on the individual. Past history of treated hypertension and GI reflux. Pre-existing conditions not covered.
Decided to self insure. Thailand healthcare is inexpensive unless you compare it to cost in a socialist system. The care is very good to excellent. Virtually no waiting times,too. Others may have different opinions. You may be better off if you can get comprehensive travel insurance. Good luck.