Can my mom switch from a Non-O visa to a retirement visa in Thailand?

Yes, your mom can potentially switch from a Non-O visa to a retirement visa in Thailand, but there are specific requirements to meet. It's essential to visit the immigration office to inquire about the process, especially since her current Non-O visa was initially issued for medical purposes. She may face challenges if her visa details indicate it was strictly for medical reasons. To qualify for a retirement visa, she will need to have 800,000 baht in her own Thai bank account for at least two months before applying for the extension.