If your friend is applying for the OA visa AXA Easy Care Visa is a policy specifically for this and is the most popular, can buy directly online with instant confirmation.
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.