It hallucinates and it's live in many places. My doctor uses it.
AFAICT the hallucination rate is fairly low. It's transcription and summarization which has a lower hallucination rate than when it's asked for an answer.
It's massively better than the alternative. Taking the time to write down proper notes is the difference between 4 patients per hour and 6 and a commensurate drop in income. So notes virtually always get short-changed.
Very occasionally hallucinated notes are better than notes that are almost always incomplete.