- Raley's Family of Fine StoresJ1522
- Ralph LaurenJ1938
- Ram Mutual Insurance CompanyJ1894
- Rampart Insurance Company38512
- Ramsey County MinnesotaJ1663
- Rancho Santiago Community College District CaliforniaJ1635
- Randstad USAJ1456
- Ravenswood Physician AssociatesRPAWC
- RCI47076
- RecologyJ1675
- Red Oak Independent School DistrictA0205
- Redirect Health Administration86145
- Redlands Community HospitalRCH23
- Redlands IPA (Synermed)SYMED
- Redlands Yucaipa Medical Group18247
- Redwood Coast PACER3483
- Redwood Health Services03293
- Reflect Health31441
- Regal Medical GroupREGAL
- Regence BlueCross BlueShield of Oregon00851
- Regence BlueCross BlueShield of Utah00910
- Regence BlueShield of Idaho00611
- Regence BlueShield of Washington00932
- Regence Group AdministratorsRGA01
- Regency Employee Benefits38221
- Regis BrandsJ1467
- Rehab Provider Network31127
- Rehn & AssociatesREHNA
- Reimbursement Specialists IncZP1346
- Reliance Community Care Partners (RCCP)79846
- Reliance Global Group86304
- Reliance Matrix71005
- Reliance Matrix36088
- Reliance Standard Life Insurance CompanyAMTAS00427
- Religious Order of Jehovah's WitnessROJW1
- Renaissance Life and HealthRLHA1
- Renaissance MedicaidTNC02
- Renaissance PhysiciansRENGQ
- Republic Franklin Insurance12475
- Republic Indemnity Company of AmericaJ1008
- Republic Western Insurance CompanyJ1597
- ResCare IncorporatedJ1376
- Residential Services GroupJ1097
- Resolute Forest ProductsJ1954
- Restaurant Reinsurance LimitedJ1098
- Resurrection Physician Providers GroupRPPG1
- Return to Work (RTW)J1202
- Revecore62177
- Revived Medical Independent Practice AssociationREVIV
- RevMedJ1848
- RHHI Home Health Medicare NHIC12HHA
- RHHI Home Health Medicare Region IV (Gulf Coast/Midwest)12M80
- RHHI Home Health Medicare Region V - Service Area 712M98
- Rhone Poulenc IncorporatedJ1099
- Rieth Riley Construction CompanyJ1100
- RightCare74205
- RightChoice Benefits Administrators37331
- Rincol Health NetworkRHN01
- Rios Southwest Medical GroupRIOS1
- Risk Administration ServicesJ1828
- Risk Reduction StrategiesRISRX
- Risk Transfer Technologies IncorporatedJ1101
- Riverport Insurance (Minnesota School Board Association)J1546
- Riverside Medical ClinicRMC01
- RMSCO (Risk Management Services Company)16117
- Rockford Mutual Insurance Company27065
- Rocky Mountain Health PlansRKYMHP
- Rocky Mountain PACE93142
- Royal Neighbors of America10751
- RSC Insurance Services Ltd.J1102
- Rubicon Health GroupIHS18
- Ryder Services Incorporated660407821
- Ryder Services Incorporated - Worker CompensationJ1009