Now the medical world is being rocked by a major shift. It is called ICD-10 — the 10th version of the medical-coding bible. This is a sweeping upgrade and expansion of its predecessor ICD-9. The umbrella name for the medical codes is the International Classification of Diseases — hence ICD. Medical providers covered by HIPAA will be required to bill insurers using ICD-10 coding beginning October 1, 2014. That comes after a one-year federal delay to allow more time to prepare.