| NOD | Naito-Oyanagi disease; National Organization on Disability; nodular melanoma; nonobese diabetic; not... |
|---|---|
| NSCD | nonservice connected disability |
| OASDHI | Old Age, Survivors, Disability and Health Insurance |
| OASDI | Old Age Survivors and Disability Insurance |
| PDI | pain disability index; periodontal disease index; plan-do integration; psychomotor development index... |