| Suffolk County | Nassau County | The Hamptons | 
| Halperin Walter DDS 916 Crestview Ave Valley Stream NY, 11581 (516) 791-4391 | Hammer Karen DDS 847 N Broadway Massapequa NY, 11758 (516) 798-0850 | ||
| Hampton Dentistry 27 Riverhead Rd Westhampton Beach NY, 11978 (631) 998-3980 | Hampton Pediatric Dental Associate - Nancy Cosenza DDS 97 N Main St Ste B Southampton NY, 11968 (631) 287-8687 | ||
| Hanna Charlie K DDS 145 Oak St West Hempstead NY, 11552 (516) 481-5636 | Hannon ANN M DMD 33 Nassau Blvd West Hempstead NY, 11552 (516) 486-3564 | ||
| Hardej Adrian M DDS OFC 50 Hempstead Ave Lynbrook NY, 11563 (516) 593-8808 | Harold Guerrero Dental Family - Harold Guerrero Senior MD 1355 E 3rd Ave Bay Shore NY, 11706 (631) 968-6524 | ||
| Harold R Karlin DDS 433 Atlantic Ave East Rockaway NY, 11518 (516) 593-2720 | Harris Mark J DMD 392 Deer Park Ave Babylon NY, 11702 (631) 669-1077 | ||
| Hartswell Wesley F DDS 46 Great East Neck Rd West Babylon NY, 11704 (631) 661-0460 | Harutunian Michele M DDS 340 Dogwood Ave Franklin Square NY, 11010 (516) 538-3800 | ||
| Harvey Caplin Dental Office - Harvey Caplin DDS 111 Smithtown Byp Hauppauge NY, 11788 (631) 724-0900 | Harvey Caplin Dental Office - Jacqueline Fries DDS 111 Smithtown Byp Hauppauge NY, 11788 (631) 724-0900 | ||
| Harvey Gralnick DDS 44 E Tiana Rd Hampton Bays NY, 11946 (631) 728-5880 | Harwood Scott A DDS 1705 Bway Hewlett NY, 11557 (516) 593-4111 | ||
| Haselkorn Michael DDS 240 Patchogue Yaphank Rd Patchogue NY, 11772 (631) 289-7755 | HD Dentistry 11 Highland Rd Glen Cove NY, 11542 (516) 801-3553 | ||
| Healthy Dental Smile 34 E Montauk Hwy Hampton Bays NY, 11946 (631) 594-3100 | Heinl Richard C 77 Park Ave Manhasset NY, 11030 (516) 627-6868 | ||