| Suffolk County | Nassau County | The Hamptons | 
| Labcorp 74 Southaven Ave Medford NY, 11763 (631) 289-1490 | Labcorp 1267 E Main St Riverhead NY, 11901 (631) 727-0318 | ||
| Labcorp 905 Uniondale Ave Uniondale NY, 11553 (516) 539-2169 | Labcorp at Asthma Allergy and Immunology 865 Northern Blvd Great Neck NY, 11021 (516) 829-2340 | ||
| Laboratory Corporation 48 Route 25a Smithtown NY, 11787 (631) 724-0329 | Laboratory of Dermatopathy 2 N Plandome Rd Port Washington NY, 11050 (516) 944-3882 | ||
| Laboratory of Dermatopathy 1660 Walt Whitman Rd Melville NY, 11747 (631) 755-5577 | Long Island Pathology PC 240 Meeting House Ln Southampton NY, 11968 (631) 204-0444 | ||
| Lynbrook Diagnostic Laboratory INC 1 Long Beach Rd Island Park NY, 11558 (516) 897-7815 | Matrix Microsystems INC 70 Eatons Neck Rd Northport NY, 11768 (631) 754-1155 | ||
| Matrix Microsystems INC 44 W Jefryn Blvd Deer Park NY, 11729 (631) 242-3061 | McClain Laboratories 45 Manor Rd Smithtown NY, 11787 (631) 361-4000 | ||
| Meade Testing Laboratories INC 25 Kinkel St Westbury NY, 11590 (516) 338-4583 | Medstock 111 Hempstead Tpke West Hempstead NY, 11552 (516) 280-4475 | ||
| Medstock INC 1225 Franklin Ave Garden City NY, 11530 (516) 992-3400 | Mercy Medical Center - Laboratory 1000 N Village Ave Rockville Centre NY, 11570 (516) 705-2202 | ||
| Metropolitan Diagnostic - J Jason Bitter MD 520 Old Country Rd Plainview NY, 11803 (516) 433-7500 | Nassau Pathology PC 32 John Bean Ct Port Washington NY, 11050 (516) 621-6655 | ||
| New York Diagnostics 363 Route 111 Smithtown NY, 11787 (631) 366-3030 | Next Generation 1060 Cornwell Ave Baldwin NY, 11510 (516) 208-3709 | ||