From the two chapters that I have read so far (and I haven't watched the TV series), if he has been mocking anyone, it's the other doctors (and himself). He seems to be quite sympathetic to most of the patients.
One incident in Chapter 2 that had a resonance with me was where a patient's excrement was a worrying colour, which after much research was diagnosed to be due to severe beetroot consumption. I once went to my GP when my urine was deep red . . .