Published on January 6, 2026

Major Health Insurance Companies in California

California’s health insurance market is dominated by a small group of large insurers that operate across public programs, Covered California, and private employer plans.

Major Health Insurance Companies by Market Share

The following companies are considered major insurers in California due to enrollment size, statewide presence, and provider networks:

  1. Kaiser Permanente
  2. Blue Shield of California
  3. Anthem Blue Cross
  4. Health Net
  5. UnitedHealthcare
  6. Molina Healthcare
  7. LA Care Health Plan

Kaiser Permanente is the largest health insurance provider in California, especially dominant in employer sponsored insurance, Covered California, and Medicare Advantage.

Public vs Private Health Insurance Cost Comparison Table

Average Monthly Premium Costs in California

Insurance TypePlan ExampleMonthly PremiumDeductibleOut of Pocket Max
Medi Cal (Public)LA Care Medi Cal$0$0Very Low
Medi Cal (Public)Molina Medi Cal$0$0Very Low
Covered California SilverBlue Shield Silver 70 PPO$50 to $300 (after subsidy)$1,000 to $3,500$8,700
Covered California BronzeKaiser Bronze 60 HMO$300 to $450$6,300$9,100
Employer PPO (Private)Anthem PPO$150 to $600 (employee share)$1,500 to $3,000$7,500
Private Individual PPOBlue Shield PPO Off Exchange$450 to $900$2,500 to $6,000$9,100

Costs vary by age, county, and income level.

Public Health Insurance Providers and Costs

Medi Cal Insurance Companies and Costs

Insurance CompanyMonthly CostCopaysBest For
LA Care Health Plan$0$0 to lowLow income families
Molina Healthcare$0$0 to lowChronic care needs
Health Net Medi Cal$0MinimalBroad county access
Anthem Blue Cross Medi Cal$0MinimalLarge provider network
Kaiser Permanente Medi Cal$0MinimalIntegrated care model

Major Medi Cal provider: LA Care Health Plan
LA Care is the largest publicly operated health plan in the United States, serving millions in California.

Covered California Insurance Companies and Plan Costs

Covered California Plan Cost Comparison

Insurance CompanyBronze PlanSilver PlanGold PlanNetwork Type
Kaiser Permanente$320 to $450$380 to $520$450 to $650HMO
Blue Shield of California$350 to $500$420 to $600$520 to $720PPO
Anthem Blue Cross$340 to $480$410 to $590$510 to $700PPO
Health Net$310 to $460$390 to $560$480 to $680HMO PPO
Oscar Health$300 to $430$370 to $520LimitedEPO

Major Covered California insurers:
Kaiser Permanente and Blue Shield of California lead enrollment statewide.

Private Employer Health Insurance Companies and Costs

Employer Sponsored Insurance Cost Table

Insurance CompanyPlan TypeMonthly Employee CostNetwork
Kaiser PermanenteHMO$150 to $350Closed network
Anthem Blue CrossPPO$200 to $600Large national
Blue Shield of CaliforniaPPO$180 to $550Strong CA network
UnitedHealthcarePPO$200 to $580National
AetnaPPO HDHP$170 to $500National

Major employer insurer: Kaiser Permanente
Kaiser dominates large employers and public sector jobs in California.

Medicare Insurance Companies and Costs in California

Insurance CompanyPlan TypeMonthly CostMajor Advantage
Kaiser Permanente MedicareAdvantage HMO$0 to $50Integrated care
SCAN Health PlanAdvantage HMO$0Senior focused
UnitedHealthcareAdvantage PPO$0 to $80National access
HumanaAdvantage$0Extra benefits
Anthem Blue CrossAdvantage PPO$0 to $70Large network

Major Medicare insurer: Kaiser Permanente and UnitedHealthcare

Which Health Insurance Company Is Best in California

Best Overall Health Insurance Company

Kaiser Permanente
Best for affordability, preventive care, and coordinated treatment.

Best PPO Insurance Company

Blue Shield of California
Best for flexibility and specialist access.

Best Low Cost Public Insurance

Medi Cal through LA Care or Molina
Best for low income residents.

Best for Seniors

Kaiser Permanente Medicare or SCAN Health Plan

Summary: Public vs Private Insurance Companies in California

CategoryPublic InsurancePrivate Insurance
Major CompaniesLA Care, Molina, Health NetKaiser, Blue Shield, Anthem
Monthly Cost$0 to low$150 to $900
Provider ChoiceLimitedBroad
Best ForLow income residentsEmployed and high income
Largest InsurerLA Care (public)Kaiser Permanente (private)

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