But what is 'personally identifiable'? Say a patient had a complaint about the cost of a visit, and stormed out of the office saying 'screw you' in the waiting

But what is 'personally identifiable'? Say a patient had a complaint about the cost of a visit, and stormed out of the office saying 'screw you' in the waiting room, and the review noted this. Other patients who were in the waiting room would likely be able to identify the patient. Would a doctor responding to the (anonymous) complaint, noting details about a patient's illness constitute personally identifiable information? It's not easy from a doctor's perspective to identify such situations, and it's a very sticky area. Given that it's a sticky area, do you think any doctor would risk crossing the line? There are large legal risks involved here.