| Saltzman, Tanis, Pittell, Levin and Jacobson LLC | Plantation, FL | 54 |
| Children's Hospital Corporation | Boston, MA | 44 |
| Golden Valley Health Centers | Merced, CA | 32 |
| UPMC Medical Education | Pittsburgh, PA | 26 |
| The Children's Mercy Hospital | Kansas City, MO | 23 |
| UT Southwestern Medical Center | Dallas, TX | 23 |
| Nebraska Pediatric Practice, Inc. | Omaha, NE | 20 |
| Children's National Medical Center | Washington, DC | 20 |
| University Pediatricians | Deteroit, MI | 19 |
| West Virginia University Medical Corporation | Morgantown, WV | 19 |
| The University of Iowa | Iowa City, IA | 19 |
| The Nemours Foundation - Nemours Children's Health | Jacksonville, FL | 19 |
| Sanford Clinic | Sioux Falls, SD | 19 |
| USA HealthCare Management, LLC | Mobile, AL | 18 |
| Valley Children'S Primary Care Group, Inc. | Madera, CA | 18 |
| University of Minnesota Physicians | Minneapolis, MN | 17 |
| West Virginia University | Morgantown, WV | 17 |
| Emory & Children's Pediatric Institute, Inc. | Atlanta, GA | 15 |
| Physician Affiliate Group Of Ny, PC | New York, NY | 15 |
| IU Health Care Associates | Indianapolis, IN | 15 |
| Family Healthcare Network | Visalia, CA | 15 |
| Cleveland Clinic Foundation | Cleveland, OH | 15 |
| Valley Children'S Specialty Medical Group, Inc. | Madera, CA | 14 |
| Community Medical Centers, Inc. | Stockton, CA | 14 |
| The Metrohealth System | Cleveland, OH | 14 |
| Pediatric Service Group, LLP | Syracuse, NY | 14 |
| The Children's Hospital of Philadelphia | Philadelphia, PA | 14 |
| East Tennessee Children's Hospital, Inc. | Knoxville, TN | 13 |
| Pediatric Academic Association, Inc. | Columbus, OH | 13 |
| Mercy Clinics, Inc. | Des Moines, IA | 13 |
| The Providence Community Health Centers, Inc. | Providence, RI | 13 |
| Indiana University | Indianapolis, IN | 12 |
| Johns Hopkins University | Baltimore, MD | 12 |
| New York City Health and Hospitals Corporation | New York, NY | 12 |
| Family Health Centers of Southwest Florida, Inc. | Fort Myers, FL | 11 |
| Connecticut Children's Specialty Group, Inc. | Hartford, CT | 11 |
| UT Le Bonheur Pediatric Specialists, Inc | Memphis, TN | 11 |
| Northwest Pediatric Specialists, LLC | Toledo, OH | 10 |
| St. John's Well Child and Family Center, Inc. | Los Angeles, CA | 10 |
| St. Louis Children's Hopsital | St. Louis, MO | 10 |
| Alliance for Childhood Diseases | Las Vegas, NV | 10 |
| University Of Florida | Gainesville, FL | 9 |
| University Of Kentucky | Lexington, KY | 9 |
| Mayo Clinic | Rochester, MN | 9 |
| Faculty Physicians & Surgeons of LLUSM | Loma Linda, CA | 9 |
| JWCH Institute Inc. | Commerce, CA | 9 |
| University of Alabama Health Services Foundation, PC | Birmingham, AL | 8 |
| Beacon Medical Group | South Bend, IN | 8 |
| The Ohio State University | Columbus, OH | 8 |
| Saint Francis Health System | Tulsa, OK | 8 |
| University of Colorado | Boulder, CO | 8 |
| State University of New York, Upstate Medical University | Syracuse, NY | 8 |
| Community Health Centers Of The Central Coast, Inc. | Nipomo, CA | 8 |
| Carolinas Physicians Network, Inc. d/b/a Atrium Health Medical Group | Charlotte, NC | 8 |
| University of Washington | Seattle, WA | 8 |
| NYU Grossman School of Medicine | New York, NY | 8 |
| Aurora Medical Group, Inc. | Milwaukee, WI | 8 |
| Geisinger Clinic | Danville, PA | 8 |
| United Health Services Hospitals, Inc. | Binghamton, NY | 8 |
| Bronxcare Health System | Bronx, NY | 7 |
| University Of Miami | Miami, FL | 7 |
| Boston Children's Network Specialty Physicians, Inc | Boston, MA | 7 |
| St. Barnabas Hospital | Bronx, NY | 7 |
| OSF Multi-Specialty Group | Peoria, IL | 7 |
| Oregon Health & Science University | Portland, OR | 7 |
| Big Springs Medical Association, Inc. | Ellington, MO | 7 |
| University of Louisville | Louisville, KY | 7 |
| Omni Family Health | Bakersfield, CA | 7 |
| Scott & White Clinic | Temple, TX | 7 |
| Montefiore Medical Center | Bronx, NY | 7 |
| Lester E. Cox Medical Centers | Springfield, MO | 7 |
| Iowa Physicians Clinic Medical Foundation | West Des Moines, IA | 6 |
| University of Pittsburgh Physicians | Pittsburgh, PA | 6 |
| Baystate Medical Practices, Inc. | Springfield, MA | 6 |
| Eastern Maine Medical Center | Bangor, ME | 6 |
| Medical Education Assistance Corporation | Johnson City, TN | 6 |
| Mercy Clinic Springfield Communities | Springfield, MO | 6 |
| Rutgers, The State University of New Jersey | Newark, NJ | 6 |
| Massachusetts General Physicians Organization | Somerville, MA | 6 |
| St. Jude Children'S Research Hospital | Memphis, TN | 6 |
| University of Minnesota | Minneapolis, MN | 6 |
| Sanford Clinic North | Fargo, ND | 6 |
| Greater Family Health | Elgin, IL | 5 |
| Mercy Clinic East Communities | Chesterfield, MO | 5 |
| Clinicas del Camino Real | Camarillo, CA | 5 |
| Advocate Health and Hospitals Corporation | Oak Brook, IL | 5 |
| Icahn School of Medicine at Mount Sinai | New York, NY | 5 |
| Yakima Valley Farm Workers Clinic | Toppenish, WA | 5 |
| National Pediatric M.D., P.C. | Corona, NY | 5 |
| Stormont-Vail HealthCare | Topeka, KS | 5 |
| Holyoke Health Center, Inc. | Holyoke, MA | 5 |
| ACCESS Community Health Network | Chicago, IL | 5 |
| Ridgecrest Regional Hospital | Ridgecrest, CA | 5 |
| Cumberland County Hospital System, Inc. | Fayetteville, NC | 5 |
| Presbyterian Healthcare Services | Albuquerque, NM | 5 |
| Avera McKennan | Sioux Falls, SD | 5 |
| Karthikeya Devireddy, MD, Inc. | Los Banos, CA | 5 |
| Banner Medical Group | Phoenix, AZ | 5 |
| Children's Physician Services of South Texas | Corpus Christi, TX | 5 |
| Orlando Health Medical Group, Inc. | Orlando, FL | 5 |
| The Health Care Authority Of The City Of Huntsville | Huntsville, AL | 5 |
| Pediatrics 2000, II P.C. | New York, NY | 5 |
| Altura Centers for Health | Tulare, CA | 5 |
| Ampla Health | Yuba City, CA | 5 |
| University at Buffalo Pediatric Associates, Inc. | Buffalo, NY | 5 |
| Children's Hospital Los Angeles Medical Group, Inc. | Los Angeles, CA | 5 |
| Driscoll Children'S Hospital | Corpus Christi, TX | 5 |
| MVHS, Inc. | Utica, NY | 4 |
| Wright Center for Graduate Medical Education | Scranton, PA | 4 |
| The Leland Stanford, Jr University | Stanford, CA | 4 |
| Comanche County Hospital Authority | Lawton, OK | 4 |
| Columbia University | New York, NY | 4 |
| Weill Cornell Medical College | New York, NY | 4 |
| CHI St. Alexius Health | Bismarck, ND | 4 |
| Edward W. Sparrow Hospital Association | Lansing, MI | 4 |
| Christiana Care Health Services, Inc. | Wilmington, DE | 4 |
| Mercy Clinic Joplin, LLC | Joplin, MO | 4 |
| The Permanente Medical Group, Inc. | Pleasanton, CA | 4 |
| Indiana Health Centers, Inc. | Indianapolis, IN | 4 |
| Norton Healthcare Inc. | Louisville, KY | 4 |
| United Medical Centers | Eagle Pass, TX | 4 |
| Pediatrix Medical Group of Michigan P.C. | Sunrise, FL | 4 |
| Children's Hospital Medical Center of Akron d/b/a Akron Children's Hospital | Akron, OH | 4 |
| University Physicians & Surgeons, Inc. | Huntington, WV | 4 |
| Eliezer Hernandez, MD, PA | Eagle Pass, TX | 4 |
| Erlanger Health | Chattanooga, TN | 4 |
| University of South Florida | Tampa, FL | 4 |
| Clinica Sierra Vista | Bakersfield, CA | 4 |
| TopCare Medical Group Inc. | Dallas, TX | 4 |
| Saginaw Cooperative Hospitals | Saginaw, MI | 4 |
| Saint Agnes Medical Providers, Inc. | Fresno, CA | 3 |
| Columbus Ambulatory Healthcare Services, Inc. | Atlanta, GA | 3 |
| Maimonides Medical Center | Brooklyn, NY | 3 |
| Isabella Citizens For Health Inc | Mount Pleasant, MI | 3 |
| Happi Health | Huntsville, AL | 3 |
| County of Monterey | Salinas, CA | 3 |
| Trinity Health | Minot, ND | 3 |
| Marshfield Clinic | Marshfield, WI | 3 |
| Broome Pediatrics PC | Johnson City, NY | 3 |
| Hospital Service District No. 1 of East Baton Rouge Parish, Louisiana | Zachary, LA | 3 |
| USACS Medical Group Ltd. | Canton, OH | 3 |
| Covenant Medical Center, Inc. | Waterloo, IA | 3 |
| Phoenix Children's Hospital | Phoenix, AZ | 3 |
| Lone Star Circle Of Care | Georgetown, TX | 3 |
| Bayou La Batre Area Health Development Board, Inc. | Irvington, AL | 3 |
| Yuma Regional Medical Center, an Arizona Non-Profit Corporation | Yuma, AZ | 3 |
| Southern Illinois University Carbondale | Carbondale, IL | 3 |
| Ochsner Clinic Foundation | New Orleans, LA | 3 |
| Mercy Clinic Fort Smith Communities | Fort Smith, AR | 3 |
| St. Vincent Medical Group, Inc. | Indianapolis, IN | 3 |
| Health and Life Organization, Inc. | Sacramento, CA | 3 |
| Community Health Center, Inc. | Middletown, CT | 3 |
| Saint Peter's University Hospital, Inc. | New Brunswick, NJ | 3 |
| St. Bernard’s Hospital, Inc. | Jonesboro, AR | 3 |
| Pediatric Group of Acadiana LLC | Lafayette, LA | 3 |
| Vidant Medical Group, LLC | Greenville, NC | 3 |
| Parkview Health System, Inc. | Fort Wayne, IN | 3 |
| Pediatrix Medical Group, P.C. | Sunrise, FL | 3 |
| University Hospitals Medical Group, Inc. | Cleveland, OH | 3 |
| Wake Forest University Health Sciences | Winston-Salem, NC | 3 |
| Charles Cole Memorial Hospital | Pittsburgh, PA | 3 |
| Optum Medical Care Of New Jersey, P.C. | Secaucus, NJ | 3 |
| Central Arkansas Pediatrics, P.A. | Conway, AR | 3 |
| Marana Health Center | Marana, AZ | 3 |
| Yale University | New Haven, CT | 3 |
| El Rio Santa Cruz Neighborhood Health Center, Inc. | Tucson, AZ | 3 |
| MedStar Medical Group II, LLC | Columbia, MD | 3 |
| University of Rochester | Rochester, NY | 3 |
| Southern California Permanente Medical Group | Pasadena, CA | 3 |
| AltaPointe Healthcare Management, LLC | Mobile, AL | 3 |
| The University Of Kansas Medical Center | Kansas City, KS | 3 |
| Texas Tech University | Lubbock, TX | 3 |
| Wyckoff Heights Medical Center | Brooklyn, NY | 3 |
| Pediatrix Medical Group of Louisiana, LLC | Sunrise, FL | 3 |
| Nor Lea Hospital District | Lovington, NM | 3 |
| Bay Area Community Health | Fremont, CA | 3 |
| SFV Health Center, Inc. | Sun Valley, CA | 3 |
| Banner University Medical Group | Phoenix, AZ | 3 |
| Neonatal Services Psc | Madisonville, KY | 3 |
| St. Catherine Hospital | Garden City, KS | 3 |
| San Joaquin General Hospital | French Camp, CA | 3 |
| Jackson County Memorial Hospital Authority | Altus, OK | 3 |
| Old Dominion University | Norfolk, VA | 3 |
| UMass Memorial Medical Group, Inc. | Worcester, MA | 3 |
| United Health Centers of the San Joaquin Valley | Fresno, CA | 3 |
| Altru Health System | Grand Forks, ND | 3 |
| Hamilton Health Center | Harrisburg, PA | 3 |
| Meridian Health Services Corp | Muncie, IN | 3 |
| MedStar Medical Group-Southern Maryland, LLC | Hollywood, MD | 3 |
| Miami Beach Community Health Center Inc. | North Miami, FL | 3 |
| Pediatrix of Maryland, P.A. | Sunrise, FL | 3 |
| Guthrie Medical Group, P.C. | Sayre, PA | 3 |
| Baylor College of Medicine | Houston, TX | 3 |
| Children's Hospital | New Orleans, LA | 3 |
| Guthrie Lourdes Hospital | Binghamton, NY | 3 |
| North Florida Pediatrics, P.A. | Lake City, FL | 3 |
| State University Of New York At Buffalo | Buffalo, NY | 3 |
| Southside Medical Center, Inc. | Atlanta, GA | 3 |
| Indiana University Health Southern Indiana Physicians, LLC | Bloomington, IN | 3 |
| Central Oklahoma American Indian Health Council, Inc. | Oklahoma City, OK | 2 |
| Wellstar Medical Group, LLC | Marietta, GA | 2 |
| Urban Health Plan, Inc. | Bronx, NY | 2 |
| Concord Hospital - Laconia | Concord, NH | 2 |
| Children's Hospital Pediatric Associates, Inc. | Boston, MA | 2 |
| North Marshall Pediatrics PC | Guntersville, AL | 2 |
| Grace Community Health Center, Inc. dba Grace Health | Corbin, KY | 2 |
| Cook County Health | Chicago, IL | 2 |
| Spartanburg Regional Health Services District, Inc. d/b/a Spartanburg Regional Healthcare System | Spartanburg, SC | 2 |
| Dana-Farber Cancer Institute | Boston, MA | 2 |
| Whatley Health Services, Inc. | Tuscaloosa, AL | 2 |
| Healthfirst Family Care Center | Fall River, MA | 2 |
| Henry Ford Health System | Detroit, MI | 2 |
| Fayette Physician Network, Inc. | Uniontown, PA | 2 |
| Carle Health Care, Incorporated | Champaign, IL | 2 |
| Ozark Neonatal Associates, Inc. | Sunrise, FL | 2 |
| Scranton Primary Health Care Center, Inc. | Scranton, PA | 2 |
| Berks Community Health Center | Reading, PA | 2 |
| Conway Hospital, Inc. | Conway, SC | 2 |
| Physician Groups, LC | St. Louis, MO | 2 |
| Kenwood Pediatrics, LLC | Bethesda, MD | 2 |
| MCR Health, Inc. | Bradenton, FL | 2 |
| Choctaw Nation of Oklahoma | Durant, OK | 2 |
| Mountain Park Health Center | Phoenix, AZ | 2 |
| Central Counties Health Centers, Inc., | Sprinfield, IL | 2 |
| Queen'S University Medical Group | Honolulu, HI | 2 |
| Sunset Park Health Council, Inc. | Brooklyn, NY | 2 |
| Las Cruces Physician Services, LLC | Las Cruces, NM | 2 |
| University of California, Los Angeles | Los Angeles, CA | 2 |
| Greater Philadelphia Health Action, Inc. | Philadelphia, PA | 2 |
| Caring Health Center, Inc. | Springfield, MA | 2 |
| Rochester General Hospital | Rochester, NY | 2 |
| MyMichigan Medical Group | Midland, MI | 2 |
| Unicare Community Health Center Inc. | Ontario, CA | 2 |
| Brevard Health Alliance, Inc. | West Melbourne, FL | 2 |
| Community Health of Central Washington | Yakima, WA | 2 |
| Christie Clinic PLLC | Champaign, IL | 2 |
| Deming Hospital Corporation | Deming, NM | 2 |
| PeaceHealth | Vancouver, WA | 2 |
| Providence Health & Services - Oregon | Portland, OR | 2 |
| Children's Specialized Hospital | New Brunswick, NJ | 2 |
| Insight Chicago, Inc. | Chicago, IL | 2 |
| Albemarle Physician Services - Sentara, Inc. | Virginia Beach, VA | 2 |
| The Mary Imogene Bassett Hospital | Cooperstown, NY | 2 |
| Cook Children's Physician Network | Fort Worth, TX | 2 |
| HealthSource Of Ohio, Inc. | Loveland, OH | 2 |
| Centennial Medical Group, Inc. | Roseburg, OR | 2 |
| Compassion Pediatrics LLC | Orlando, FL | 2 |
| Center for Family Health | Jackson, MI | 2 |
| Prevea Clinic, Inc. | Green Bay, WI | 2 |
| STC Pediatrics LLC | Philadelphia, PA | 2 |
| Clinicas de Salud del Pueblo, Inc. | El Centro, CA | 2 |
| The Wellness Plan Medical Centers | Detroit, MI | 2 |
| The University Of Tennessee | Knoxville, TN | 2 |
| University of Oklahoma | Norman, OK | 2 |
| Lake County Tribal Health Consortium, Inc. | Lakeport, CA | 2 |
| Pikeville Medical Center, Inc. | Pikeville, KY | 2 |
| Northwell Health | New Hyde Park, NY | 2 |
| Crisp Regional Hospital, Inc. | Cordele, GA | 2 |
| Baptist Memorial Medical Group, Inc. | Memphis, TN | 2 |
| Bexar County Hospital District | San Antonio, TX | 2 |
| Orlando Health Inc. | Orlando, FL | 2 |
| Coastal Kids | Bakersfield, CA | 2 |
| Pediatrix Medical Group of Alabama Inc. | Sunrise, FL | 2 |
| Edward M. Kennedy Community Health Center, Inc. | Worcester, MA | 2 |
| Meritus Medical Center, Inc. | Hagerstown, MD | 2 |
| University of Kansas School of Medicine-Wichita Medical Practice Association | Wichita, KS | 2 |
| Denver Health and Hospital Authority | Denver, CO | 2 |
| Good Samaritan Hospital Medical Center | West Islip, NY | 2 |
| Willamette Family Medical Center, Inc. | Salem, OR | 2 |
| Physicians Network Medical Group, Inc. | Roseville, CA | 2 |
| Family Care Center Inc. | Allentown, PA | 2 |
| Namita Mohideen MD Inc. d/b/a Golden Gate Health | Fontana, CA | 2 |
| Pediatric Partners, LLC | Fremont, NE | 2 |
| Swedish Health Services | Renton, WA | 2 |
| Arkansas Children's Medical Group, PLLC | Little Rock, AR | 2 |
| The Gould Medical Group, Inc. | Modesto, CA | 2 |
| Red Oaks Medical Group, Inc. | Red Bluff, CA | 2 |
| Cornell Scott Hill Health Corporation | New Haven, CT | 2 |
| Valley Healthcare Centers | Porterville, CA | 2 |
| Fulton County Health Center | Wauseon, OH | 2 |
| Ascension St. John Hospital | Detroit, MI | 2 |
| Amistad Community Health Center Inc | Corpus Christi, TX | 2 |
| Columbus Regional Health Physicians, LLC | Columbus, IN | 2 |
| New Windsor Pediatrics, LLC | New Windsor, NY | 2 |
| South Padre Island Pediatrics Center, PLLC | Corpus Christi, TX | 2 |
| Wayne Memorial Community Health Centers | Honesdale, PA | 2 |
| Rome Memorial Hospital, Inc. | Rome, NY | 2 |
| Gainesville Community Hospital, Inc. | Gainesville, TX | 2 |
| Altamed Health Services Corporation | Los Angeles, CA | 2 |
| Little Company of Mary Hospital of Indiana, Inc. | Jasper, IN | 2 |
| Franciscan Missionaries of Our Lady Health System, Inc. | Baton Rouge, LA | 2 |
| Stony Brook Children's Services, UFPC | Stony Brook, NY | 2 |
| Public Hospital District No 1 Of Mason County | Shelton, WA | 2 |
| The Children's Medical Group | Poughkeepsie, NY | 2 |
| Vanderbilt University Medical Center | Nashville, TN | 2 |
| Chiricahua Community Health Centers, Inc. | Sierra Vista, AZ | 2 |
| Samuel U. Rodgers Health Center, Inc. | Kansas City, MO | 2 |
| University of Arkansas for Medical Sciences | Little Rock, AR | 2 |
| San Benito Health Foundation | Hollister, CA | 2 |
| Ascension Medical Group Via Christi, P.A. | Wichita, KS | 2 |