| NAS-NRC | National Academy of Science-National Research Council |
|---|---|
| NCD | National Commission on Diabetes; National Council on Drugs; neurocirculatory dystonia; nitrogen clea... |
| NCTC | National Cancer Tissue Culture; National Collection of Type Cultures |
| NDC | National Data Communications; National Drug Code; Naval Dental Clinic; nondifferentiated cell |
| NHDS | National Health Data System; National Hospital Discharge Survey |