| Business | Phone |
| Physicians Referral 7600 Fannin St, Houston 77054 | (281) 438-4357 |
| Medicus International 4801 Woodway Dr 162, Houston 77056 | (713) 668-9000 |
| M D Diagnostic Svc 2200 Southwest Fwy 344, Houston 77098 | (713) 523-9903 |
| Harris County Medical Society 1515 Hermann Dr, Houston 77004 | (713) 524-4267 |
| Hei Doctor Finder 1615 Hillendahl Blvd, Houston 77055 | (713) 932-5500 |
| Houston Neurological Institute 11914 Astoria Blvd 320, Houston 77089 | (281) 922-6733 |
| Innovative Physician Solutions 16800 Greenspoint Park 255n, Houston 77060 | (281) 873-6346 |