| Business | Phone |
| Aegis Medical Systems Inc 125 W F St, Ontario 91762 | (909) 986-4550 |
| B Street Clinic 310 W B St, Ontario 91762 | (909) 984-5605 |
| California Medical Clinic 402 E Holt Blvd # E, Ontario 91761 | (909) 467-1605 |
| Central Occupational Medicine 59 S Milliken Ave # 100, Ontario 91761 | (909) 605-8888 |
| Clinica Medica Par La Mujer 104 W C St # 208, Ontario 91762 | (909) 988-4878 |
| Inland Center Medical Group 750 N Archibald Ave # L, Ontario 91764 | (909) 989-7551 |
| Inland Industrial Medical 1920 S Archibald Ave, Ontario 91761 | (909) 947-8196 |
| Kids Come First 1501 S Bon View Ave, Ontario 91761 | (909) 673-9125 |
| La Mission Medical Group Inc 1341 E 4th St, Ontario 91764 | (909) 467-0303 |
| Med-Stop 4325 E Guasti Rd, Ontario 91761 | (909) 605-9713 |
| Medical Center Of Santa Rita 437 N Euclid Ave, Ontario 91762 | (909) 988-2555 |
| Medical Development Intl 337 N Vineyard Ave, Ontario 91764 | (909) 974-0120 |
| Molina Medical Center 1650 S Euclid Ave, Ontario 91762 | (909) 467-0797 |
| Geriatric Health Center 647 E E St, Ontario 91764 | (909) 988-3890 |
| Ropt-Premier Medical Mgmt 1804 E Elma Ct, Ontario 91764 | (909) 390-9500 |
| Trident Medical Inc 4230 E Airport Dr # 108, Ontario 91761 | (909) 390-1398 |
| U S Healthworks Medical Group 2171 S Grove Ave # A, Ontario 91761 | (909) 923-4080 |
| U S Healthworks Of California 3200 Inland Empire Blvd # 100, Ontario 91764 | (909) 945-5011 |