Figure 1 (image) Radiological Society of North America Share Print E-Mail Caption As of December 2015, 410 mammography facilities in 39 states across the United States have already registered to be part of the National Mammography Database (NMD). Credit Radiological Society of North America Usage Restrictions May use with credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.