| Business | Phone |
| Northshore Health Systems Lab 800 Northern Blvd # 5, Great Neck 11021 | (516) 869-8462 |
| Enzo Clinical Labs Inc 560 Northern Blvd # 110, Great Neck 11021 | (516) 773-3589 |
| Q C Bio-Med Survey Systems Inc 32 Oxford Blvd, Great Neck 11023 | (516) 482-1800 |