In interviews, officials at several health systems using MyChart’s tool acknowledged that they do not disclose that the messages contain A.I.-generated content.

Air Doctor's platform helps travelers find doctors in other countries, and it has now raised $20 million in a Series B round after seeing strong traction.

OpenAI’s ChatGPT is increasingly used for health advice. Its new HealthBench tool tests A.I. accuracy on 5,000 doctor-reviewed queries.