What occurs is that they will try to speak to the doctor when your not there, they will try to get the doctor to agree to things that is not in your best interest. And so, things will happen outside your presence and it could drive a wedge between you and your doctor.
They really should, as a general rule, not speak to your doctor. However, there are situations where we allow a nurse on the case, and the nurse will show up at a medical appointment and they can ask questions of the doctor in your presence.
As a general rule, 100% of the time: if we do allow the employer or a representative of the employer to speak to your doctor, then you must be present – in person or on the phone.