| 4001 | 11513 | Northridge Medical Center |  | 11046 | 11919 | 8843 | 2394 |
| 4002 | 248 | NorthShore University HealthSystem | | 728 | 380 | 1577 | 355 |
| 4003 | 1380 | Northside Hospital | | 733 | 297 | 12104 | 2394 |
| 4004 | 1009 | Northside Hospital & Tampa Bay Heart Institute | | 791 | 601 | 6213 | 1934 |
| 4005 | 13388 | Northside Hospital Foundation |  | 12340 | 13468 | 10253 | 2394 |
| 4006 | 5653 | NORTHSTAR Health System | | 4867 | 6717 | 4413 | 2394 |
| 4007 | 2857 | Northumberland Hills Hospital | | 4136 | 4706 | 2056 | 1328 |
| 4008 | 884 | Northwest Community Hospital | | 4155 | 840 | 1586 | 972 |
| 4009 | 14877 | Northwest Eye Center Wheat Ridge CO | | 13167 | 14539 | 12104 | 2394 |
| 4010 | 7460 | Northwest Eye Clinic MN | | 8844 | 5577 | 9811 | 2394 |
| 4011 | 6785 | Northwest Eye Surgeons Seattle WA | | 5737 | 4036 | 12104 | 2394 |
| 4012 | 10361 | Northwest Florida Community Hospital | | 10978 | 10251 | 8843 | 2394 |
| 4013 | 8325 | Northwest Georgia Oncology Centers | | 5121 | 8672 | 8651 | 2394 |
| 4014 | 5052 | Northwest Health System | | 2100 | 3373 | 10913 | 2394 |
| 4015 | 14259 | Northwest Hospital & Medical Center Childbirth Center Seattle WA | | 8098 | 14667 | 5518 | 2394 |
| 4016 | 710 | Northwest Hospital Gamma Knife Center | | 3917 | 270 | 1590 | 2394 |
| 4017 | 12616 | Northwest Medical Center Fasthealth Corporation | | 11770 | 13253 | 8217 | 2394 |
| 4018 | 1248 | Northwest Medical Center Margate FL | | 1180 | 742 | 5127 | 2394 |
| 4019 | 4366 | Northwest Medical Center Tucson Area | | 781 | 3415 | 10913 | 2394 |
| 4020 | 9411 | Northwest Mississippi Regional Medical Center | | 670 | 11264 | 10913 | 2394 |
| 4021 | 7770 | Northwest Specialty Hospital ID | | 9897 | 7301 | 7393 | 2394 |
| 4022 | 14921 | Northwest Tennessee Cardiology Clinic | | 14419 | 14667 | 9811 | 1934 |
| 4023 | 4673 | Northwest Texas Healthcare System | | 9019 | 3362 | 5959 | 2394 |
| 4024 | 11424 | Northwestern LASIK Physicians | | 13021 | 9675 | 12104 | 2394 |
| 4025 | 4673 | Northwestern Medical Center | | 4417 | 5620 | 3715 | 2394 |
| 4026 | 60 | Northwestern Medicine | | 203 | 289 | 93 | 115 |
| 4027 | 5325 | Northwestern Memorial Physicians Group | | 8262 | 3588 | 7956 | 2394 |
| 4028 | 10184 | Northwood Deaconess Health Center | | 13374 | 9970 | 7560 | 2394 |
| 4029 | 11092 | Norton County Hospital | | 12841 | 10145 | 10253 | 2394 |
| 4030 | 334 | Norton Health Care | | 927 | 411 | 310 | 1085 |
| 4031 | 7184 | Norton Sound Health Corporation | | 9516 | 5385 | 9261 | 2394 |
| 4032 | 2379 | Norwalk Hospital | | 4021 | 2230 | 2496 | 2394 |
| 4033 | 14961 | Novamed Eye Surgery Center of Madison | | 13652 | 14667 | 9811 | 2394 |
| 4034 | 416 | Novant Health | | 506 | 272 | 1505 | 1934 |
| 4035 | 14549 | Novant Health Blume Pediatric Hematology & Oncology | | 11432 | 14455 | 12104 | 2394 |
| 4036 | 14682 | Novant Health Bradford Clinic Obstetrics & Gynecology | | 3877 | 14667 | 12104 | 2394 |
| 4037 | 6627 | Novato Community Hospital | | 3678 | 7355 | 7298 | 2394 |
| 4038 | 15614 | Nuclear Oncology Medical Care | | 14762 | 14667 | 12104 | 2394 |
| 4039 | 7445 | Nueterra Healthcare | | 9497 | 4737 | 10913 | 2394 |
| 4040 | 15327 | Nuevo Hospital Bocagrande |  | 14968 | 14608 | 12104 | 2394 |
| 4041 | 1301 | Nyack Hospital | | 4554 | 581 | 3731 | 2394 |
| 4042 | 13084 | Nye Regional Medical Center NV | | 11397 | 13225 | 10253 | 2394 |
| 4043 | 4314 | NYU Fertility Center New York NY | | 6017 | 3055 | 7210 | 2394 |
| 4044 | 6268 | O'Connor Hospital | | 8063 | 6651 | 4915 | 2394 |
| 4045 | 979 | Oak Hill Hospital | | 816 | 629 | 3814 | 2394 |
| 4046 | 3881 | Oak Valley Hospital Catholic Healthcare West CA | | 8586 | 3045 | 4232 | 2394 |
| 4047 | 7176 | Oakbend Medical Center | | 9002 | 6464 | 7660 | 2394 |
| 4048 | 10401 | Oakdale Community Hospital | | 14541 | 8801 | 8843 | 2394 |
| 4049 | 9105 | Oakdale Obstetrics and Gynecology P.A. | | 9148 | 10637 | 5071 | 2394 |
| 4050 | 8162 | Oakland Mercy Hospital | | 3913 | 10806 | 4575 | 2394 |
| 4051 | 5058 | Oaklawn Hospital | | 2707 | 5842 | 7393 | 1934 |
| 4052 | 7565 | Oakleaf Medical Network | | 5975 | 7124 | 8843 | 2394 |
| 4053 | 379 | Oakwood Healthcare System | | 843 | 478 | 386 | 1157 |
| 4054 | 6755 | Ocala Eye Center | | 11548 | 5720 | 6554 | 2394 |
| 4055 | 1442 | Ocala Regional Medical Center | | 837 | 1116 | 6554 | 1934 |
| 4056 | 8705 | Ocean Beach Hospital and Medical Clinics WA | | 10815 | 9787 | 4798 | 2394 |
| 4057 | 10029 | Ochiltree General Hospital | | 14968 | 5384 | 12104 | 2394 |
| 4058 | 60 | Ochsner Health System | | 120 | 285 | 370 | 92 |
| 4059 | 11819 | OCMI Obesidad & Cirugía Mini-Invasiva |  | 13271 | 13003 | 5164 | 2394 |
| 4060 | 4492 | Oconee Regional Health Systems | | 9336 | 4499 | 4270 | 1934 |
| 4061 | 6130 | Ocular Oncology Service At Bascom Palmer Eye Institute | | 12932 | 2818 | 9504 | 2394 |
| 4062 | 15699 | Odessa Heart Institute P.A. | | 15080 | 14667 | 12104 | 2394 |
| 4063 | 6195 | Odessa Regional Medical Center | | 2748 | 8476 | 4442 | 2394 |
| 4064 | 15559 | Oftal Clinic |  | 14607 | 14667 | 12104 | 2394 |
| 4065 | 14917 | Oftalmerida Clínica de Especialidades Oftalmológicas |  | 8648 | 14667 | 12104 | 2394 |
| 4066 | 15506 | Oftalmoclinic Centro de Cirugía Ocular |  | 14471 | 14667 | 12104 | 2394 |
| 4067 | 14891 | Oftalmolaser Clínica Oftalmológica | | 12098 | 14667 | 10253 | 2394 |
| 4068 | 14170 | Oftalmología Mexicana Clínica de Especialidades Oftalmológicas | | 13419 | 14320 | 9055 | 2394 |
| 4069 | 14428 | Oftalmología Privada |  | 10140 | 14608 | 9055 | 2394 |
| 4070 | 15327 | Oftalmos Instituto Oftalmológico | | 14968 | 14608 | 12104 | 2394 |
| 4071 | 1742 | Ogden Regional Medical Center UT | | 1408 | 895 | 7755 | 2394 |
| 4072 | 14700 | OHB (Oxigenación Hiperbárica) Punto Azul Medicina Hiperbárica | | 13989 | 14455 | 12104 | 2394 |
| 4073 | 13109 | Ohb Rio Medicina Hiperbarica |  | 13725 | 12364 | 12104 | 2394 |
| 4074 | 6036 | Ohio County Hospital | | 8556 | 4825 | 7560 | 2394 |
| 4075 | 11008 | Ohio Eye Alliance | | 12454 | 9114 | 12104 | 2394 |
| 4076 | 7957 | Ohio Heart & Vascular Center | | 7269 | 8426 | 7039 | 2394 |
| 4077 | 10369 | Ohio Orthopedic Center of Excellence | | 14968 | 7223 | 9811 | 2394 |
| 4078 | 708 | Ohio State University Medical Center Columbus Ohio | | 3730 | 95 | 5921 | 2394 |
| 4079 | 4420 | Ohio State University Medical Center Department of Internal Medicine Columbus Ohio | | 2753 | 1998 | 12104 | 2394 |
| 4080 | 14619 | Ohio Surgery Center | | 10894 | 14667 | 8217 | 2394 |
| 4081 | 4829 | Ohio Valley General Hospital | | 9781 | 3766 | 5127 | 2394 |
| 4082 | 13020 | Ohio Valley Medical Center | | 15468 | 10574 | 12104 | 2394 |
| 4083 | 5064 | Ohio Valley Medical Center East Ohio Regional Hospital | | 4811 | 6773 | 5518 | 1328 |
| 4084 | 391 | OhioHealth | | 1646 | 237 | 1205 | 1328 |
| 4085 | 9637 | Okeene Municipal Hospital | | 14968 | 9192 | 4232 | 2394 |
| 4086 | 11411 | Oklahoma City Clinic | | 12411 | 11827 | 8086 | 2394 |
| 4087 | 4841 | Oklahoma Heart Hospital | | 6624 | 4278 | 5789 | 2394 |
| 4088 | 10942 | Oklahoma Spine Hospital | | 12013 | 10368 | 9811 | 2394 |
| 4089 | 6755 | Oklahoma State University Medical Center | | 8219 | 6584 | 6554 | 2394 |
| 4090 | 6155 | Oktibbeha County Hospital | | 9002 | 5899 | 5518 | 2394 |
| 4091 | 1913 | Olathe Health System Inc Miami County Medical Center | | 952 | 3129 | 2220 | 1934 |
| 4092 | 4259 | Olean General Hospital | | 5082 | 4459 | 4365 | 2394 |
| 4093 | 4383 | Olin Health Center | | 10646 | 3782 | 3204 | 2394 |
| 4094 | 5286 | Olmsted Medical Center | | 4782 | 3101 | 10253 | 2394 |
| 4095 | 10393 | Olson Center for Women's Health University of Nebraska Medical Center | | 9431 | 9463 | 10913 | 2394 |
| 4096 | 8084 | Olympia Medical Center Los Angeles CA | | 10360 | 7151 | 8217 | 2394 |
| 4097 | 2454 | Olympic Medical Center WA | | 5390 | 3829 | 1366 | 1328 |
| 4098 | 9506 | Omaha Eye & Laser Institute and Lincoln Eye & Laser Institute | | 10140 | 9153 | 8843 | 2394 |
| 4099 | 8098 | Omega Hospital Llc. | | 13271 | 3958 | 12104 | 2394 |
| 4100 | 8674 | Omni Eye Services | | 8710 | 9685 | 6059 | 2394 |
