Mortality Medical Data System

The Mortality Medical Data System (MMDS) is used to automate the entry, classification, and retrieval of cause-of-death information reported on death certificates throughout the United States and in many other countries. The National Center for Health Statistics (NCHS) began the system's development in 1967.

The system has facilitated the standardization of mortality information within the United States, and ACME has become the de facto international standard for the automated selection of the underlying cause of death from multiple conditions listed on a death certificate.