| Business | Phone |
| Alema Health Systems Inc 415 N Vineyard Ave, Ontario 91764 | (909) 390-2281 |
| Allcare Health Svc Inc 4365 E Lowell St, Ontario 91761 | (909) 390-5772 |
| Extreme Health Formulas 1 Mills Cir, Ontario 91764 | (909) 581-1404 |
| Health Factor 123 W B St, Ontario 91762 | (909) 983-5555 |
| Healthcare Ontario 524 N Palm Ave, Ontario 91762 | (909) 984-4848 |
| Ics 1215 E Airport Dr, Ontario 91761 | (909) 873-3030 |
| Med-Tox Health Svc 3350 Shelby St # 200, Ontario 91764 | (909) 944-3181 |
| Mother's Nutritional Center 806 S Mountain Ave, Ontario 91762 | (909) 984-6457 |
| Adventist Health Behavioral Cr 3602 Inland Empire Blvd, Ontario 91764 | (909) 945-5662 |
| Cardinal Health 4200 Concours, Ontario 91764 | (909) 466-6100 |
| Source 1 Health Care Tech 1590 S Milliken Ave # J, Ontario 91761 | (909) 974-0495 |
| Southwest Health Alternatives 716 N Lassen Ave, Ontario 91764 | (909) 467-2420 |
| Sunplus Home Health 337 N Vineyard Ave, Ontario 91764 | (909) 605-7000 |
| Adventist Health Managed Care 3602 Inland Empire Blvd, Ontario 91764 | (909) 945-5662 |