What are the health insurance requirements for the Non-Immigrant Visa-O-A in Thailand, particularly for retirees with pre-existing conditions?

The post inquires about the health insurance requirements for applying for a Non-Immigrant Visa-O-A for retirement in Thailand. The user has a pre-existing condition (diabetes) and is unsure if travel insurance is acceptable for the visa, given it only covers up to six months. Community responses clarify that standard travel insurance is generally not accepted, and the visa typically requires health insurance with specific coverage amounts (recently discussed amounts include 40k and 400k Bahts). Some suggest applying for a different visa type (Non-O) from within Thailand and mention that health insurance can still be obtained despite pre-existing conditions, as long as those conditions are excluded from coverage.