Common Medical Abbreviations and Acronyms

1. NPO
   Nothing By Mouth
2. NPO
   Nil Per Os
3. NPPV
   Noninvasive Positive-Pressure Ventilation
4. NPQ
   Not Physically Qualified
5. NPTAC
   No Previous Tracing Available for Comparison
6. NPV
   Negative Predictive Value (e.g., of a diagnostic test)
7. NR
   Do Not Repeat
8. NR
   Not Applicable
9. NR
   Number
10. NR
    Normal
11. NRB
    non-rebreather mask
12. NRBC
    Nucleated Red Blood Cell
13. NRE
    Norepinephrine
14. NREM
    non–rapid eye movement
15. NRL
    normal reaction to light
16. NRMC
    Naval Regional Medical Center
17. NRTI
    Non-Nucleoside Reverse Transcriptase Inhibitor
18. NRTI
    Nucleoside Reverse Transcriptase Inhibitor
19. NS
    Normal Saline
20. NS
    Nuclear Sclerosis

Last updated: May 2, 2025 — Total entries: 7,183