| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 541219 | 541219 | 541219 | Accountants' (except CPAs) offices | |||
| 541219 | 541219 | 541219 | Accountants' (except CPAs) private practices | |||
| 541219 | 541219 | 541219 | Accounting services (except CPAs) | |||
| 541219 | 541219 | 541219 | Billing services | |||
| 541219 | 541219 | 541219 | Bookkeepers' offices | |||
| 541219 | 541219 | 541219 | Bookkeepers' private practices | |||
| 541219 | 541219 | 541219 | Bookkeeping services | |||
| 541219 | 541219 | 541219 | Medical coding services combined with accounting services (except CPA services) | |||
| 541219 | 541219 | 541219 | Public accountants' (except CPAs) offices | |||
| 541219 | 541219 | 541219 | Public accountants' (except CPAs) private practices |