| Mainehealth | Portland | 2,633 |
| Eastern Maine Medical Center | Bangor | 624 |
| Mainegeneral Medical Center | Waterville | 555 |
| Central Maine Medical Center | Lewiston | 342 |
| Spectrum Healthcare Partners PA | Portland | 308 |
| Mercy Hospital | Portland | 301 |
| St Joseph Hospital | Bangor | 199 |
| St Marys Regional Medical Center | Lewiston | 198 |
| York Hospital | Wells | 198 |
| Intermed PA | South Portland | 183 |
| Health Affiliates Maine, LLC | Auburn | 179 |
| Bluewater Emergency Partners of Brunswick, LLC | Lewiston | 154 |
| Penobscot Community Health Center | Old Town | 135 |
| Sweetser | Brunswick | 134 |
| Pinnacle Rehabilitation Network LLC | Portland | 106 |
| The Aroostook Medical Center | Presque Isle | 104 |
| Spurwink Services Incorporated | Portland | 91 |
| Martin's Point Health Care, Inc. | Scarborough | 89 |
| Healthreach Community Health Centers | Livermore Falls | 86 |
| Acadia Hospital Corp. | Bangor | 85 |
| Maine Center for Cancer Medicine and Blood Disorders PA | Westbrook | 70 |
| Katahdin Valley Health Center | Brownville | 67 |
| Kennebec Valley Mental Health Center | Waterville | 67 |
| Maine Coast Regional Health Facilities | Ellsworth | 66 |
| Mount Desert Island Hospital | Bar Harbor | 65 |
| Riverview Physical Therapy Limited Partnership | Yarmouth | 63 |
| Houlton Regional Hospital | Houlton | 60 |
| Back in Motion Physical Therapy LLC | Waterville | 58 |
| Pines Health Services | Presque Isle | 56 |
| Emergency Medicine Services of Maine LLC | Blue Hill | 56 |
| Cape Radiology Group PC | Portland | 55 |
| Redington-Fairview General Hospital | Skowhegan | 54 |
| Orthopaedic Associates of Maine PA | Portland | 52 |
| Fox Rehabilitation Services Me LLC | Scarborough | 45 |
| Androscoggin Home Health Services Inc | Lewiston | 43 |
| Rumford Hospital | Rumford | 39 |
| Bridgton Hospital | Bridgton | 39 |
| Northern Maine Medical Center | Fort Kent | 38 |
| Rumford Community Family Health Center Inc. | Rumford | 37 |
| City of Caribou | Caribou | 37 |
| Sebasticook Valley Health | Pittsfield | 36 |
| Portland Community Health Center | Portland | 36 |
| Mrh Corp | Dover Foxcroft | 35 |
| Kennebec Anesthesia Associates PA | Waterville | 34 |
| Pai Participant 7 PC | Falmouth | 33 |
| Hospital Medicine Services of Maine LLC | Ellsworth | 31 |
| Maine Strong Physical Therapy PA | Saco | 31 |
| Chest Medicine Associates PA | South Portland | 30 |
| Cornerstone Behavioral Healthcare LLC | Waterville | 30 |
| Bucksport Regional Health Center | Bucksport | 30 |
| Down East Community Hospital | Machias | 29 |
| Convenientmd LLC | Portland | 28 |
| Maine Optometry PA | Gorham | 25 |
| Apogee Medical Group Maine PC | Bangor | 25 |
| Health Access Network Inc | Lincoln | 24 |
| Charles A Dean Memorial Hospital | Sangerville | 23 |
| Portland Gastroenterology Associates PA | Portland | 22 |
| St Croix Regional Family Health Center | Princeton | 21 |
| Dermatology Associates, LLC | Portland | 21 |
| Reform Physical Therapy Inc | Topsham | 21 |
| Maine Eye Center PA | Portland | 20 |
| Healthy Minds Counseling Inc | Portland | 20 |
| Fish River Rural Health | Eagle Lake | 20 |
| New England Radiological Consortium LLC | Freeport | 19 |
| State of Maine | Bangor | 19 |
| Ventura Medical Services LLC | Topsham | 19 |
| Greater Brunswick Physical Therapy PA | Belfast | 19 |
| Aroostook Mental Health Services, Inc. | Ellsworth | 19 |
| Impact Health Me, LLC | Yarmouth | 19 |
| County Physical Therapy LLC | Caribou | 18 |
| Coastal Women's Healthcare | Scarborough | 18 |
| Sacopee Valley Health Center | Porter | 18 |
| Plastic and Hand Surgical Associates | Westbrook | 17 |
| Millinocket Regional Hospital | Millinocket | 17 |
| Scarborough Physical Therapy Associates PA | Scarborough | 17 |
| York County Community Action Corp | Springvale | 17 |
| Medoptions of Maine LLC | Belfast | 16 |
| Maine Medical Services LLC | Ellsworth | 15 |
| University of New England | Biddeford | 15 |
| Penobscot Valley Hospital | Lincoln | 15 |
| Dahl Chase Pathology Associates PA | Bangor | 15 |
| Community Clinical Services Inc | Lewiston | 14 |
| Preferred Therapy Outpatient Services of Me, LLC | Camden | 14 |
| Radiology Consultants of Maine LLC | Brunswick | 14 |
| Down East Orthopedic Assoc PA | Bangor | 14 |
| Community Health and Counseling Services | Ellsworth | 13 |
| Indian Township Tribal Government | Indian Twp | 13 |
| Coastal Orthopedics and Sports Medicine,p.A. | Brunswick | 12 |
| Northeast Pain Management PC | Bangor | 12 |
| Dfd Russell Medical Center Inc | Monmouth | 12 |
| Eastport Health Care, Inc | Eastport | 12 |
| Massabesic Health Resources PA | Waterboro | 12 |
| Family Planning Association of Maine Inc | Ellsworth | 12 |
| Passamaquoddy Tribal Council | Pleasant Point | 11 |
| Careall PC | South Portland | 11 |
| The Family Center of Maine | Gorham | 11 |
| Mainegeneral Health | Augusta | 11 |
| Associated Eye Care, P.A. | Sanford | 11 |
| X-Ray Professional Association | Bridgton | 11 |
| Edgewater Orthopedic Physical Therapy, LLC | Falmouth | 10 |