- L.A. Care Health Plan (California)LACAR
- LA Department of Water and PowerJ1514
- LACH HealthNet by MedPointMPM19
- Lafayette Consolidated Government71037
- Lagniappe AdvantageLALA1
- Lake Area Community Health Plan52511
- Lakeside Community HealthcareLMG01
- Lakeside Comprehensive Healthcare66127
- Lakeside Health Services95415
- Lakeside Medical Group66125
- Lancaster General Health Group16109
- Landin Services LLCLU454
- Landmark Health Plan of CaliforniaLHP31
- Landmark HealthplanLNDMK
- Landry'sJ1889
- Landstar BCO Workers' Compensation ProgramJ1080
- Lantern Care48888
- LaSalle Medical AssociatesLSMA2
- Lassen Municipal Utility District53122
- Lasso HealthCare MSA10550
- Lawndale Christian Health CenterLAWND
- Leading Edge AdministratorsOMNIA
- League of Minnesota Cities Insurance TrustJ1527
- Leon Health PlanA3565
- Leon Medical Center Health PlanLMCHP
- Level Health LVL21
- LFP CorporationJ1650
- Liberty Advantage North CarolinaLIB01
- Liberty Dental PlanCX083
- Liberty HealthShare90753
- Liberty National Life Insurance Company65331
- Life ArmstrongR3476
- Life Beaver PACER3475
- Life ButlerR3477
- Life Investors of America (Long Term Care)12T39
- Life St. FrancisR3473
- Life St. Joseph of the PinesTRNPC
- LifeCare Assurance Company11170
- LifeCircles PACE71498
- LifemapRLH01
- LifeShield National Insurance Co.47865
- LifeWise Assurance Company93095
- LifeWise Health Plan of Washington93094
- LifeWorks AdvantageLWA01
- Limric Plumbing, Heating & Air (UCS BASI)31456
- Lincoln Heritage10749
- LINECOLCB01
- Little Company of MaryLCM1
- Live Well IPALWIPA
- Lockard Williams Insurance ServicesCB752
- Loma Linda University Adventist37267
- Loma Linda University Managed Care33036
- Long Beach Unified School DistrictJ1515
- Long's DrugsJ1464
- Longevity Health ColoradoLCO01
- Longevity Health FloridaLFL01
- Longevity Health IllinoisLIL01
- Longevity Health MassachusettsLMA01
- Longevity Health MichiganLMI01
- Longevity Health New JerseyLNJ01
- Longevity Health New YorkLNY01
- Longevity Health North CarolinaLNC01
- Longevity Health OklahomaLOK01
- Loren Cook73236
- Louisiana Blue53120
- Louisiana Healthcare Connections
- Louisiana Medicaid Medicare Advantage CrossoversSKLA5
- Louisiana State UniversityJ1953
- Lowe'sJ1465
- Lower Kuskokwim School District56756
- Loyal American Life Insurance CompanyLALMS
- Loyola Physician Partners37175
- LSG Sky Chefs InternationalJ1081
- LUBA Casualty Insurance CompanyJ1341
- Lucent Health02057
- Lucent Health88056
- Lucent Health68011
- Lucent Health07689
- Lucent Health65085
- Lumbermens Underwriting AllianceJ1899
- Lumico Life Insurance CompanyZ96364
- Luminare Health75136
- Luminare Health48117
- Luminare Health38225
- Luminare Health35182
- Luminare Health35187
- Luminare Health Ohio35183
- Lummi Indian Business CouncilLUMMI
- Lutheran Advanced PPO89643
- Lutheran PreferredMP330
- Lutheran Services CarolinasLSC01
- LWCCJ1547
- Lynwood Unified School District (California)J1669
- LynxJ1949