What are the barriers to the communication and sharing of health care information?

Consider a patient (real or imagined) with a chronic health condition. Identify at least three actual health care providers that this patient has seen in the past twelve months. Draw a diagram to illustrate the timeline of the patient’s encounters. Considering these encounters, how easy is it for each provider to share health care information regarding this patient with the others? What are the barriers to the communication and sharing of health care information? How will this affect the patient’s overall care?