Making a Fishbone Diagram for Medical Diagnosis A fishbone diagram, also known as an Ishikawa diagram or a cause-and-effect diagram, is a model used to determine the likely underlying causes of a problem or consequence. Using a fishbone diagram to clarify medical diagnoses in health care might assist individuals obtain a better knowledge of their medical concerns. It may also inspire individuals to seek therapy, which may result in a major improvement in their health. Creating diagrams as a medical professional might be difficult. You can design a fishbone diagram in minutes with Venngage's Fishbone Diagram Maker to engage and educate your patients.