Centene vs Kaiser Permanente
Centene Corporation and Kaiser Permanente are two significant players in the U.S. health insurance market, each with distinct approaches to healthcare coverage as of 2025. These companies continue to compete for market share and customer loyalty in an evolving healthcare landscape.
Centene, the largest health insurer on the Health Insurance Marketplace, holds a 14% market share nationally as of late 2023. Known for its focus on government-sponsored healthcare programs, Centene primarily serves Medicaid and Medicare beneficiaries, as well as individuals in the Health Insurance Marketplace through its Ambetter brand.

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Customer Reviews
Kaiser Permanente, founded in 1945, operates on a unique integrated care model, combining health insurance with its own network of hospitals and physicians. It currently serves about 7% of the national market share, focusing on managed care plans and emphasizing overall member wellness. Kaiser Permanente has consistently received high ratings for customer satisfaction, ranking as the best health insurance company for 2025 according to Insure.com.
Both insurers offer health plans including Medicare Advantage, but they differ significantly in their geographic coverage, network structures, and specific plan offerings. This comparison will explore the key differences between Centene and Kaiser Permanente, examining their market positions, plan availability, and approaches to healthcare delivery.
Plan Options & Coverage Types
HMO, PPO, POS, EPO Differences
Centene offers primarily HMO plans across its subsidiaries, including plans from WellCare, Ambetter, and Health Net. PPO and EPO offerings are limited and typically available only through certain brands like Health Net in specific states.
Kaiser Permanente exclusively offers HMO plans, operating on a unique integrated care model where members receive care within the Kaiser health system.
Individual Plans vs. Employer-Sponsored Plans
Centene focuses on individual and family plans via the ACA Marketplace and Medicaid. Employer-sponsored plans are minimal or non-core.
Kaiser provides individual, family, and employer-sponsored plans, including large-group and small-business coverage in states where it operates.
Medicare Advantage vs. Medicare Supplement
Centene, primarily through WellCare, offers Medicare Advantage plans and D-SNPs (for dual-eligibles).
Kaiser Permanente also offers highly rated Medicare Advantage plans, but does not offer Medigap (Supplement) plans.
Medicaid and ACA Marketplace Options
Centene is a leading Medicaid provider and has a strong presence in the ACA Marketplace under brands like Ambetter.
Kaiser participates in Medicaid and ACA exchanges, but only in the states where it owns healthcare facilities (8 states + D.C.).
Cost & Affordability
Monthly Premiums Comparison
Centene’s ACA plans (Ambetter) are known for low monthly premiums, often among the most affordable on the Marketplace.
Kaiser’s HMO plans are also competitively priced, especially in Medicare Advantage and ACA tiers, offering strong value for coordinated care.
Deductibles and Copayments
Centene offers tiered options with Bronze, Silver, and Gold plans, balancing higher deductibles with lower premiums.
Kaiser often features predictable copays and lower deductibles, especially in Medicare Advantage and employer plans.
Out-of-Pocket Maximums
Both carriers offer compliant OOP maximums under ACA standards, with Kaiser’s caps often being lower due to the cost-control of in-house care delivery.
Pricing Transparency
Centene provides online estimators via Ambetter and WellCare platforms.
Kaiser integrates cost estimates into its member portal and mobile app, improving transparency with in-network costs.
Network Size & Provider Accessibility
Size and Geographic Reach of Provider Networks
Centene has a broad national footprint, with a presence in over 30 states through its subsidiaries, using contracted third-party providers.
Kaiser only operates in 8 states (CA, CO, GA, HI, MD, OR, VA, WA) and Washington D.C., with members restricted to Kaiser-owned providers.
Specialist Access and Referrals
Both carriers require PCP referrals for specialists under HMO plans.
Kaiser’s referral system is internal and streamlined due to their integrated model, while Centene’s referrals go through a broader network.
Availability of In-Network Hospitals and Doctors
Centene’s network varies widely by region and brand; access is often broader than Kaiser’s, depending on location.
Kaiser limits access to its own hospitals and doctors, ensuring consistency but reduced choice.
Out-of-Network Coverage and Reimbursement
Centene’s HMO plans offer limited or no out-of-network coverage, except for emergencies.
Kaiser also restricts out-of-network care, keeping services within their system unless urgent or emergent care is needed.
Member Benefits & Perks
Wellness Incentives
Centene brands offer rewards for preventive screenings, health assessments, and immunizations.
Kaiser includes comprehensive preventive care, lifestyle coaching, and wellness classes—often built into their HMO model.
Chronic Disease Management Programs
Both carriers offer programs for diabetes, hypertension, asthma, and more. Kaiser’s model integrates these services directly with providers.
Centene’s programs vary by subsidiary and are often contracted with third-party vendors.
Telehealth and Virtual Care
Centene’s Ambetter and WellCare plans include virtual visits via Teladoc or similar platforms.
Kaiser excels in virtual care with its own in-house doctors, accessible via mobile app, including video, phone, and email consults.
Mental Health Services
Both provide mental health services, though Kaiser offers a more integrated experience through its own therapists and behavioral health clinicians.
Customer Service & Member Experience
Customer Satisfaction (J.D. Power, NCQA)
Kaiser Permanente consistently ranks at the top of J.D. Power and NCQA ratings, especially in Medicare Advantage satisfaction.
Centene’s satisfaction ratings vary by brand and state, with average scores and some negative feedback on administrative complexity.
Ease of Claims and Disputes
Kaiser has a simple claims process due to its all-in-one structure.
Centene’s claims process can be more complex, especially for services requiring prior authorization.
Online Portals and Apps
Both insurers offer member portals and apps. Kaiser’s app is user-friendly, allowing appointment booking, messaging, prescriptions, and records.
Centene’s digital experience varies by brand and state, with Ambetter and WellCare providing basic online tools.
Customer Support Responsiveness
Kaiser offers coordinated support through care teams and 24/7 nurse lines.
Centene has standard call centers and multilingual services, but experiences may vary regionally.
Reputation & Financial Stability
Financial Ratings
Centene holds stable ratings: A- (A.M. Best), BBB+ (S&P).
Kaiser has stronger financial ratings: A (A.M. Best), AA- (Fitch), reflecting its stable, member-owned model.
Company History
Centene is a publicly traded company and a leading player in managed care, especially for government-sponsored programs.
Kaiser is a non-profit integrated health system known for its clinical innovation and preventive care approach.
Regulatory or Complaint Issues
Centene has faced some scrutiny in recent years over pharmacy benefit practices and billing issues.
Kaiser maintains a strong reputation, though some concerns exist about access to mental health services.
Medicare-Specific Criteria
Medicare Star Ratings
Kaiser Medicare Advantage plans often receive 4.5 to 5 stars, ranking among the best nationally.
Centene’s WellCare MA plans typically rate 3.5 to 4 stars, with strong performance in some regions.
Additional Medicare Benefits
Both providers include dental, vision, hearing, OTC allowances, and fitness memberships in many MA plans.
Medigap Availability
Centene does not offer Medigap plans.
Kaiser also does not offer Medigap, focusing entirely on Medicare Advantage.
Cost-Sharing for Medicare
Kaiser usually has low, predictable copays in their Advantage plans.
Centene offers D-SNP plans with $0 cost-sharing for eligible members, focused on affordability.
Employer & Small-Business Focus
Small Business Plan Options
Centene does not focus on employer-sponsored plans.
Kaiser offers group plans for businesses in their operating areas, with wellness and digital services included.
Fully Insured vs. Self-Funded Options
Kaiser offers both fully insured and self-funded options to employer groups.
Centene does not offer self-funded business health plans.
Wellness Initiatives and Employee Support
Kaiser includes fitness, mental health, and chronic disease support in its employer plans.
Centene lacks similar initiatives due to its focus on individual and government programs.
✅ Conclusion: Centene vs. Kaiser Permanente
Choose Centene if you:
- ✅ Qualify for Medicaid or ACA subsidies
- ✅ Need a low-cost D-SNP or Ambetter ACA plan
- ✅ Live in a rural or underserved area
- ✅ Don’t require out-of-network access
Choose Kaiser Permanente if you:
- ✅ Want coordinated, in-house healthcare services
- ✅ Prefer top-rated Medicare Advantage plans
- ✅ Live in a Kaiser service area and want digital-first care
- ✅ Value simplified billing and integrated care
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FAQs: Centene vs. Kaiser Permanente
What is the biggest difference between Centene and Kaiser Permanente?
Centene is a large managed care company that offers health plans through subsidiaries like Ambetter and WellCare, focusing on Medicaid, Medicare Advantage, and ACA Marketplace plans with a broad provider network. Kaiser Permanente operates as an integrated health system offering care only through Kaiser-owned hospitals and doctors in a limited number of states using HMO-only plans.
Do both Centene and Kaiser offer PPO plans?
No. Kaiser Permanente exclusively offers HMO plans, which require referrals and use only in-network providers. Centene primarily offers HMO and EPO plans, though some subsidiaries (like Health Net) may provide PPO options in specific states.
Which insurer is better for Medicaid and ACA Marketplace coverage?
Centene is one of the largest providers of Medicaid and ACA plans through brands like Ambetter and Health Net. Kaiser does participate in Medicaid and ACA plans, but only in the states where it operates healthcare facilities.
Does either company offer Medicare Supplement (Medigap) plans?
No. Neither Centene nor Kaiser Permanente currently offers Medigap plans. Both focus on Medicare Advantage (Part C), with Centene's WellCare and Kaiser's MA plans available in many regions.
Which company has a larger provider network?
Centene has a broader geographic reach through various regional plans and provider contracts. Kaiser limits members to its own Kaiser-employed doctors and hospitals, which enhances coordination but limits outside access.
Can I get out-of-network coverage with either plan?
No, unless it's an emergency. Both Centene HMO plans and Kaiser HMO plans typically do not cover out-of-network services, though Centene's PPO options (where available) may offer some out-of-network reimbursement.
Which insurer has better Medicare Advantage ratings?
Kaiser Permanente consistently receives 4.5 to 5-star Medicare Advantage ratings, placing it among the highest-rated plans in the U.S. Centene's WellCare plans generally receive 3.5 to 4 stars, depending on the market.
Which is more affordable for low-income individuals or families?
Centene is often the more affordable option for Medicaid and ACA enrollees, with subsidy-eligible low-premium plans available in many markets. Kaiser also offers affordable ACA and Medicaid plans but is available in fewer states.

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