| NPPA | National Pest Plant Accord 
| Others |
| NPPA | National Pharmaceutical Pricing Authority
| Others |
| NPPA | National Pharmaceutical Pricing Authority (India)
| Others |
| NPPA | National Pharmacy Purchasing Association
| Others |
| NPPA | National Press Photographers Association
| Others |
| NPPA | National Professional Practice Assessment
| Others |
| NPPA | National Public Prosecution Authority (Republic of Rwanda)
| Others |
| NPPA | Natriuretic Peptide Precursor A
| Others |
| NPPA | Nebraska Power Pullers Association
| Others |
| NPPA | No Parole Peltier Association
| Others |
| NPPA | Nurse Practitioners Physician Assistants
| Others |