| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 813920 | 813920 | 813920 | Accountants' associations | |||
| 813920 | 813920 | 813920 | Architects' associations | |||
| 813920 | 813920 | 813920 | Bar associations | |||
| 813920 | 813920 | 813920 | Consultants' associations | |||
| 813920 | 813920 | 813920 | Dentists' associations | |||
| 813920 | 813920 | 813920 | Dietitians' associations | |||
| 813920 | 813920 | 813920 | Educators' associations | |||
| 813920 | 813920 | 813920 | Engineers' associations | |||
| 813920 | 813920 | 813920 | Health professionals' associations | |||
| 813920 | 813920 | 813920 | Hospital administrators' associations | |||
| 813920 | 813920 | 813920 | Learned societies | |||
| 813920 | 813920 | 813920 | Medical associations | |||
| 813920 | 813920 | 813920 | Nurses' associations | |||
| 813920 | 813920 | 813920 | Occupational therapists' associations | |||
| 813920 | 813920 | 813920 | Optometrists' associations | |||
| 813920 | 813920 | 813920 | Peer review boards | |||
| 813920 | 813920 | 813920 | Personnel management associations | |||
| 813920 | 813920 | 813920 | Pharmacists' associations | |||
| 813920 | 813920 | 813920 | Professional associations | |||
| 813920 | 813920 | 813920 | Professional membership associations | |||
| 813920 | 813920 | 813920 | Professional standards review boards | |||
| 813920 | 813920 | 813920 | Psychologists' associations | |||
| 813920 | 813920 | 813920 | Scientific associations | |||
| 813920 | 813920 | 813920 | Social workers' associations | |||
| 813920 | 813920 | 813920 | Standards review committees, professional |