“Clinical Iceberg” is a term used to describe the large amount of illnesses that go unreported. For example, medical statistics are created based on information from the doctors, these statistics go on to make government policies on healthcare. According to Last (1963) as much as 94% of illness is not reported to doctors. It is the vast amount of unreported illnesses that are known as the ‘Clinical Iceberg’.
Last, J. M. (1963). THE ICEBERG “COMPLETING THE CLINICAL PICTURE” IN GENERAL PRACTICE. The Lancet, 282(7297), 28–31. https://doi.org/10.1016/S0140-6736(63)92546-7