If your clinic does not have the required BAA covering the AI service, do not put PHI into it.
Paying for ChatGPT, Claude, Copilot or another AI subscription does not by itself make that service appropriate for protected health information.
If an outside cloud provider creates, receives, maintains or transmits electronic protected health information on behalf of a HIPAA-covered organization, HHS says the organization must have the required business-associate arrangement with that provider and otherwise comply with the HIPAA Rules. [hhs.gov]
Some AI vendors offer specific enterprise or healthcare services that can operate under a Business Associate Agreement. That does not mean every account, product tier, AI feature, personal account or employee workflow is automatically covered.