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    v1.0.28
    OpenPayerStatesWashington
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    Washington Health Insurance Market Analysis: Market Share, Payer Mix, and Coverage Trends

    Washington's health insurance market is shaped by a mix of national and regional payers, with UnitedHealth Group, Kaiser Foundation Group, and Molina Healthcare Inc Group leading the landscape. The market features a strong presence of employer-based coverage and a diverse demographic profile among the privately insured.

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    State Overview

    Washington has a total population of 7.70M residents. The state comprises 39 counties. The private insurance penetration rate is 70.77%, reflecting a robust coverage landscape. UnitedHealth Group, the largest payer, is estimated to cover 1.04M privately insured members.

    Insurance Market

    RankInsurerPremium WrittenEstimated Members CoveredMarket Share
    1UnitedHealth Group$6.41B1.04M19.13%
    2Kaiser Foundation Group$4.98B810K14.88%
    3Molina Healthcare Inc Group$4.53B736K13.52%

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    References

    1. 1.S2703: Private Health Insurance Coverage by Type and Selected Characteristics. U.S. Census Bureau, 2024 American Community Survey 5-Year Estimates. Retrieved Aug 11, 2026.Annual estimates of private health insurance coverage rates by state, broken out by age, income, and plan type — the basis for this page's coverage-rate figures.
    2. 2.2024 Market Share Reports for the Top Accident and Health Insurance Groups and Companies by State and Countrywide. National Association of Insurance Commissioners (NAIC). Retrieved Aug 11, 2026.Ranks the largest accident and health insurance carriers by direct premiums written in each state, used to identify the dominant payers operating there.
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    Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

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    4
    Premera Blue Cross Group
    $3.85B
    626K
    11.49%
    5Cambia Health Solutions Inc$2.98B484K8.89%
    6Centene Corp Group$1.81B294K5.40%
    7Humana Group$1.69B276K5.06%
    8Community Health Network Group$1.62B264K4.84%
    9CVS Group$1.33B216K3.97%
    10Elevance Health Inc Group$956M156K2.86%

    The Washington health insurance market is led by UnitedHealth Group, which holds the largest share and covers over one million privately insured residents. Kaiser Foundation Group and Molina Healthcare Inc Group are also major players, each covering hundreds of thousands of members. The top five insurers collectively account for more than two-thirds of the market, indicating a moderate concentration among leading payers.

    Premiums written by these insurers are substantial, with several payers exceeding $1B in annual premiums. The diversity among the top ten insurers provides a competitive landscape, though the dominance of the largest payers is clear. Smaller insurers, such as CVS Group and Elevance Health Inc Group, maintain a presence but represent less than 4% of the market each.

    Overall, Washington's insurance market is shaped by a mix of national and regional payers, with UnitedHealth Group, Kaiser Foundation Group, and Molina Healthcare Inc Group setting the pace for coverage and premium volume. The market's structure supports a balance between concentration and competition, with significant coverage provided by employer-based plans.

    Insured Population Demographics

    Coverage TypeCountShare of Privately Insured
    Employer-Based3.77M69.29%
    Direct-Purchase395K7.25%
    TRICARE102K1.87%
    CHIP/Subsidized99.1K1.82%

    Washington's privately insured population is predominantly covered through employer-based plans, which account for nearly seven out of ten privately insured residents. Direct-purchase coverage, including individual market plans, represents a much smaller share, while TRICARE and CHIP/subsidized programs cover less than 2% each of the privately insured population.

    The demographic profile of the privately insured skews toward working-age adults, with substantial representation across all age bands. The largest age cohorts are 35-44 and 26-34, reflecting a robust workforce presence. Coverage for children and older adults is also notable, but the majority of private insurance is concentrated among adults in their prime working years.

    Market Dynamics

    Washington's health insurance market is characterized by a moderate level of concentration, with the top three insurers—UnitedHealth Group, Kaiser Foundation Group, and Molina Healthcare Inc Group—collectively accounting for nearly half of the market. UnitedHealth Group leads as the largest payer, followed closely by Kaiser Foundation Group and Molina Healthcare Inc Group. The presence of Premera Blue Cross Group and Cambia Health Solutions Inc further diversifies the market, but the top five insurers together control over two-thirds of the market share.

    Premiums written by these leading insurers reflect significant financial flows, with UnitedHealth Group alone responsible for over $6.41B in premiums. The estimated membership covered by each payer aligns closely with their market share, indicating that the largest insurers have a substantial footprint in the state's privately insured population.

    Employer-based coverage dominates the insured population, underscoring the importance of workplace-sponsored health benefits in Washington. Direct-purchase plans, TRICARE, and CHIP/subsidized programs play smaller roles, but contribute to the overall diversity of coverage options available to residents.

    The age distribution of the privately insured population reveals a strong concentration among working-age adults, with notable coverage for children and older adults. This demographic structure supports a stable risk pool and reflects the state's economic and employment landscape.

    Top 10 Health Insurers by Market Share in Washington
    Privately Insured Population by Age Band in Washington