Why is confidentiality so important in a medical office?

In the USA is is the law.  Medical issues are private matters between a healthcare provider and patient.  If a person's private information was to "get out"  it might affect their ability to get a job or they might face other predjudices  Also the private insurance numbers could be used to steal someone's identity.

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.