| Suffolk County | Nassau County | The Hamptons | 
| Li LUNG Center 6080 Jericho Tpke Commack NY, 11725 (631) 486-6712 | Lifewatch 266 Merrick Rd Lynbrook NY, 11563 (516) 599-3620 | ||
| Long Beach Medical Center 455 E Bay DR Long Beach - Respiratory Therapy 455 E Bay Dr Long Beach NY, 11561 (516) 897-1607 | Long Island Gynecologic PC 42 James Nck Saint James NY, 11780 (631) 864-5440 | ||
| Long Island Industries 350 Crooked Hill Road Brentwood NY, 11717 (631) 231-5715 | LUNG Cancer Evaluation Center Hsc T19 Stony Brook NY, 11794 (631) 444-2981 | ||
| Lynbrook Medical Group 585 Merrick Rd Lynbrook NY, 11563 (516) 612-3526 | Maya D Moorley MD 325 Park Ave Huntington NY, 11743 (631) 351-3810 | ||
| Meadowbrook Endoscopy 865 Merrick Ave Westbury NY, 11590 (516) 542-3636 | Medical & Clinical Research 332 E Main St Bay Shore NY, 11706 (631) 665-3734 | ||
| Medpro US 26 E Mall Plainview NY, 11803 (516) 777-7766 | Medshore INC 73 S Ocean Ave Patchogue NY, 11772 (631) 207-2100 | ||
| Mercy Medical Center - Cardiac Rehabiliation 1000 N Village Ave Rockville Centre NY, 11570 (516) 705-1811 | Mercy Medical Center - Cardiovascular Services 1000 N Village Ave Rockville Centre NY, 11570 (516) 705-1618 | ||
| Mercy Medical Center - Medical Records 1000 N Village Ave Rockville Centre NY, 11570 (516) 705-1310 | Mercy Medical Center - Pharmacy 1000 N Village Ave Rockville Centre NY, 11570 (516) 705-1611 | ||
| Mercy Medical Center - Psychiatric Crisis Service 1000 N Village Ave Rockville Centre NY, 11570 (516) 705-2248 | Minute Clinic 2 Jericho Tpke Huntington Station NY, 11746 (631) 425-8870 | ||
| Minute Clinic 107 S Country Rd Bellport NY, 11713 (631) 286-2222 | Minute Clinic 55 Cold Spring Rd Syosset NY, 11791 (516) 921-5910 | ||