| Business | Phone |
| Premier Diagnostic Sleep Dsrdr 3450 Loma Vista Rd, Ventura 93003 | (805) 339-0602 |
| Quest Diagnostics Inc 133 W Santa Clara St, Ventura 93001 | (805) 641-5623 |
| Retina Diagnostic Laboratory 3160 Telegraph Rd # 230, Ventura 93003 | (805) 650-0641 |
| Unilab Corp 3003 Loma Vista Rd # F, Ventura 93003 | (805) 648-2761 |
| Unilab Corp 2727 E Main St, Ventura 93003 | (805) 648-2761 |