| Business | Phone |
| Foundation Laboratories 620 S Glendora Ave, Glendora 91740 | (626) 914-3838 |
| Westcliff Medical Laboratories 1145 S Grand Ave, Glendora 91740 | (626) 914-3002 |
| Millennium Diagnostic 412 W Carroll Ave, Glendora 91741 | (626) 335-6410 |
| Quest Diagnostics Inc 210 S Grand Ave, Glendora 91741 | (626) 963-6135 |
| Unilab 130 W Route 66, Glendora 91740 | (626) 852-9371 |