- I.E. Shaffer & Co.22175
- IBA11329
- IBEW Local No. 1 Health and Welfare Fund44602
- IBG Administrators Incorporated8214
- iCare11695
- iCare Health Options TPA26054
- iCircle CareICRCL
- iCircle Care of New York33884
- ICW Group27847
- IH Plans, Inc.IHP21
- IHS Gateway Payer SouthA2352
- Illinois CasualtyJ1575
- Illinois Health Partners57140
- Illinois Physicians Alliance Independent Practice Association (IPA)IPA99
- illumifin26119
- IMA Incorporated64556
- Imagine36048143
- IMCare41600
- Immanuel PathwaysIMP01
- Impact Health AMPSZP8975
- Impact Health SharingIH400
- Imperial Health Holdings Medical GroupIHHMG
- Imperial Health Plan of CaliforniaIHP01
- Imperial Health Plan of the Southwest - Utah ExchangeIEXUT
- Imperial Insurance CompaniesIICTX
- Imperial Insurance Companies - Nevada ExchangeIEXNV
- Imperial Insurance Companies Inc - Arizona ExchangeIEXAZ
- Imperial Insurance Companies Inc - Texas ExchangeIEXTX
- IMSIMSMS
- Indecs , a Homestead CompanyL0929
- Independence AdministratorsTA720
- Independence Blue Cross54704
- Independent Clinics of Washington91164
- Independent Health95308
- Independent Living Systems (Independent Living Services Lead Agency)AAG17
- Indian Health Services00290
- Indiana Department of Health Childrens Health Claims35600
- Indiana InsuranceJ1425
- Indiana MedicaidIHCP
- Indiana University Health Plan - Medicare Advantage95444
- Indiana University Health Plans - CommercialIUHPLNS
- Individual Assurance Company Life30360
- Ingham Health Plan Corporation38343
- Ingles MarketsJ1907
- Inland Empire Health PlanIEHP1
- Inland Empire Health Plan (Covered California)IECCA
- Inland Faculty Medical GroupMVMM1
- Inland Faculty Medical GroupMVMM2
- Innermark TPA98481
- InnovAge31182
- Innovate OSF Healthcare CentralOSFC9
- Innovation Health40025
- Innovative Claim Solutions (ICS) Rancho CordovaJ1599
- Innovative Claim Solutions (ICS) San RamonJ1601
- Innovative Integrated HealthIIHPO
- Innovative Partners LP32324
- Insight Benefit Administrators96436
- Insight Benefit Administrators38254
- Insilco CorporationJ1073
- Inspira Health Network LifeR3482
- Inssolen95729
- InStil Health00C60
- Insurance Administrative SolutionsZP1071
- Insurance Administrative Solutions75300
- Insurance Company Of North AmericaZ98840
- Insurance Design Administrators13315
- Insurance Services LubbockISL11
- Insurance Systems Incorporated74385
- InsuranceTPA.com39182
- InsuricaJ1204
- Integra Administrative Group51020
- Integra PartnersINTEG
- IntegraNet HealthINET1
- Integrated Health Partners (IHP)MPM26
- Integrated Homecare ServicesIHCS1
- Integrated Medical Solutions20050
- Integrated Payor SolutionsSAGE1
- Interactive Medical Systems87765
- IntercareJ1542
- Intercare Health Plans Incorporated37227
- InterCommunity Health Network CCOINCHN
- Interface Employee Assistance Program8943
- Interinsurance Exchange of the Automobile ClubJ1810
- International Brotherhood of Boilermakers Employee Health Care Plan48603
- International Brotherhood of Electrical Workers Local 38A1317
- International Medical GroupIMGIN
- InterWest Health Preferred Provider Organization Montana84137
- INTotal Health35115
- Invicta Health Solutions40753
- Iowa Health AdvantageRP075
- Iowa Screening ProgramHSMBS
- IPMG36342
- IPMG Claims ManagementJ1887
- Iqvia15060
- Irex CorporationJ1074
- Iron Road Healthcare87042
- Ironworking Contract I PJ1075
- ISO International Student Health InsuranceISOSH
- iSurityJ1911