| Business | Phone |
| Human Bio Systems 1127 Harker Ave, Palo Alto 94301 | (650) 323-0943 |
| Igenex Inc 797 San Antonio Ave, Palo Alto 94303 | (650) 424-1191 |
| Quest Diagnostics Inc 853 Middlefield Rd, Palo Alto 94301 | (650) 330-0339 |
| Nurture Diagnostics Inc 2900 Ross Rd, Palo Alto 94303 | (650) 289-9675 |
| Palo Alto Pathology Inc 2325 El Camino Real, Palo Alto 94306 | (650) 617-1849 |
| Telik Inc 3165 Porter Dr, Palo Alto 94304 | (650) 845-7700 |
| Unilab Corp 770 Welch Rd # 181, Palo Alto 94304 | (650) 325-4096 |