Earlier quoted context omitted.
While they aren't stopping users from getting medical advice, the new terms (which they say are pretty much the same as the old terms), seem to prohibit users from seeking medical advice even for themselves if that advice would otherwise come from a licensed health professional: https://openai.com/en-GB/policies/usage-policies/ Your use of OpenAI services must follow these Usage Policies: Protect people. Everyone has…
I don't think giving someone "medical advice" in the US requires a license per se; legal entities use "this is not medical advice" type disclaimers just to avoid liability.
Disclaimers like “I am not a doctor and this is not medical advice” aren’t just for avoiding civil liability, they’re to make it clear that you aren’t representing yourself as a doctor.