| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 621492 | 621492 | 621492 | Dialysis centers and clinics | |||
| 621492 | 621492 | 621492 | Hemodialysis centers and clinics | |||
| 621492 | 621492 | 621492 | Kidney dialysis centers and clinics | |||
| 621492 | 621492 | 621492 | Renal dialysis centers and clinics |