| NPI | Narcissistic Personality Inventory 
| Others |
| NPI | Narcisstic Personality Inventory
| Others |
| NPI | Nashville Psychotherapy Institute
| Others |
| NPI | Nashville Psychotherapy Institute (Nashville, TN)
| Others |
| NPI | National Paralegal Institute
| Others |
| NPI | National Park Institute
| Others |
| NPI | National Photonics Initiative
| Others |
| NPI | National Policy Institute
| Others |
| NPI | National Power Index
| Others |
| NPI | National Prescriber Identification
| Others |
| NPI | National Preservation Institute
| Others |
| NPI | National Procurement Institute
| Others |
| NPI | National Products Inc
| Others |
| NPI | National Products, Inc.
| Others |
| NPI | National Programme on Immunization
| Others |
| NPI | National Property Inspections
| Others |
| NPI | National Provider Id
| Others |
| NPI | National Provider Identification
| Others |
| NPI | National Provider Identifier
| Others |
| NPI | National Provider Identifiers
| Others |
| NPI | National Provier Identifier
| Others |
| NPI | Nationalist Party of India
| Others |
| NPI | Negative Polarity Item
| Others |
| NPI | Neighborhood Preservation Inc
| Others |
| NPI | Neighborhood Progress Inc
| Others |
| NPI | Neighborhood Properties Inc
| Others |
| NPI | Neighborhood Prosperity Initiative
| Others |
| NPI | Network of Preferred Installers
| Others |
| NPI | Network Performance Inc
| Others |
| NPI | Network Printer Interface
| Others |
| NPI | Network Provider Interface
| Others |
| NPI | Network Provisioning Interface
| Others |
| NPI | Networking Partnering Initiative
| Others |
| NPI | Neuro Pain Inhibitor
| Others |
| NPI | Neuro-Psychiatric Institute
| Others |
| NPI | Neuropsychiatric Inventory
| Others |
| NPI | New Partners Initiative
| Others |
| NPI | New Partnerships Initiative
| Others |
| NPI | New Path International
| Others |
| NPI | New Product Innovation
| Others |
| NPI | New Product Introduction
| Others |
| NPI | New Product Introductions
| Others |
| NPI | New Products and Ideas
| Others |
| NPI | Newport Psychoanalytic Institute
| Others |
| NPI | NEXRAD Product Interface
| Others |
| NPI | Ni Puta Idea
| Others |
| NPI | Ni Puta Idea (No idea at all)
| Others |
| NPI | Nissan Philippines Inc.
| Others |
| NPI | No Passing Indicator
| Others |
| NPI | No Passing Info
| Others |
| NPI | No Pun Intended
| Others |
| NPI | Node Processor Interface
| Others |
| NPI | Noise Pollution, Inc.
| Others |
| NPI | Non Partitioned Index
| Others |
| NPI | Non Profit Institute
| Others |
| NPI | Non Public Information
| Others |
| NPI | Non- Public Information
| Others |
| NPI | Non-Pharmaceutical Interventions
| Others |
| NPI | Nordic Patent Institute
| Others |
| NPI | North Pacific Industries
| Others |
| NPI | North Pole Institute
| Others |
| NPI | Northwest Procurement Institute
| Others |
| NPI | Norwegian Polar Institute
| Others |
| NPI | Not Perfect Information
| Others |
| NPI | Not Plant Induced
| Others |
| NPI | Not Plugged In
| Others |
| NPI | Nuclear Power Institute
| Others |
| NPI | Numbering Plan Identification
| Others |
| NPI | Numbering Plan Identifier
| Others |
| NPI | Numbering Plan Indicator
| Others |
| NPI | Nutrition Policy Institute
| Others |
| NPI | Nutritional Products International
| Others |
| NPI | Source for DGEN.EXE interpreter (dBASE Application Generator)
| Others |