A friend of mine was diagnosed with colon cancer. He was 78 years old and had dropped some of his insurance coverage due to the increasing policy cost.
He compared costs and quality of care at various hospitals. Bangkok Pattaya hospital was quite expensive and he also felt they were trying to constantly upsell him with even more expensive options.
He ended up going to Queen Savsng Vadhana hospital in Sri Ratcha.
Excellent quality care in a very modern public teaching hospital associated with Chulalongkorn. He had surgery and chemo. I don’t know the exact cost but it was very reasonable.
When he was in the hospital his private room was about 3000 baht per night.