| Business | Phone |
| Bestcare Laboratory Svc 2045 Space Park Dr, Houston 77058 | (281) 335-0997 |
| Nichols Institute 6565 De Moss Dr, Houston 77074 | (713) 777-1961 |
| Clinical Pathology Lab 8935 Knight Rd, Houston 77054 | (713) 795-4299 |
| Clinical Renal Laboratory 2258 Holcombe Blvd, Houston 77030 | (713) 790-0183 |
| Elite Clinical Laboratory 7333 North Fwy 320, Houston 77076 | (713) 691-1654 |
| Extended Laboratory Svc 6160 South Loop E, Houston 77087 | (713) 641-4650 |
| Microbiology Specialists Inc 8911 Interchange Dr, Houston 77054 | (713) 663-6888 |
| Medical Service Laboratories 8830 Long Point Rd 504, Houston 77055 | (713) 461-3144 |
| Laboratories For Genetic Svc 7400 Fannin St 1200, Houston 77054 | (713) 797-9322 |