My mum and dad filled in a passenger locator form and had to book in for a PCR (I think) test. The one where they are sent off to a lab when they came back from Spain a few weeks back. Dad then had to do 10 days home quarantine as it came back positive.
What hospital are you in? Even some of the less famous amongst expats have services. I have had friends at Sukhumvit Hospital and Thonburi use the hospital services to sort visas.
I chose Bangkok hospital because of the doctor who did it the first time. I think they like to pad insurance claims. I had a doc on my bill for 20k I never even saw. They said it was the initial doc I saw in the hospital but pointed out I went direct to my previous doc. They came back and said the 20k doc contacted my insurance company in the UK😁. Dengue was only around 80k as I recall for about 5 days as I remember in hospital. This doesn't need surgical docs, so this I would have related closer to covid treatment for administrating oxygen which is why 50k seems a lot to me.
around 500k at Bkk hospital was charged on my insurance. Last one was about 12 years ago for ACL reconstruction. For the same op a friend did at Thonburi hospital for about 150k around the same time.