Marsh Mclennan Agency vs Nationwide: Professional Liability / E&O Insurance

Marsh McLennan Agency invites organizations to discuss placement with an adviser, noting specialist lines for architects and engineers or lawyers. Nationwide directs professionals serving others to an agent or a quote request.

Kearny Risk organizes these comparisons for firms whose advice, content or technology creates professional exposures.Research updated 2026-10-01

What Are the Key Differences Between Marsh McLennan Agency and Nationwide Professional Liability (E&O) Insurance?

General service errors and specialist products

Nationwide’s product page describes E&O for claims alleging errors or omissions in professional services and qualifies actual coverage, exclusions, conditions, limits and availability by the issued policy and jurisdiction. MMA’s source names E&O alongside separate A&E and lawyers professional lines. A service business should compare Nationwide’s general E&O description with the specific specialist category MMA proposes for its occupation. [4] [3]

Eligibility and written terms

Nationwide describes professionals and businesses providing services to others as its audience, with exact eligible classes subject to underwriting. MMA’s source lists several professional line categories. Share the same services, licenses and client requirements with both teams, then compare the insurer, service definition, exclusions and limits in their written offers. [4] [3]

What Should You Confirm in Marsh McLennan Agency and Nationwide Professional Liability (E&O) Insurance Quotes?

  • Does Nationwide accept your service class, and what definition and limits appear in the quote? [4] [3]
  • Which MMA general or specialist form fits the same service and licensing profile? [4] [3]

Nationwide describes E&O for claims alleging errors or omissions in professional services, with actual terms and availability set by the issued policy and jurisdiction. MMA names E&O, A&E and lawyers professional lines.

Sources reviewed

  1. 01
    Professional Liability – US Direct Errors and Omissions Insurance

    Hiscox Inc. specimen · About this Policy / Coverage for Claims Made Against You; I.A Insuring Agreement; I.B Defense; I.C Settlement; II.A Notice of Claims; II.C Optional Extended Reporting Period; III.A, III.K, III.M, III.R, III.S Exclusions; IV.A–B Limits and Deductible; VI.O Professional Services; VI.U Wrongful Act · accessed 2026-09-16

  2. 02
    Professional liability insurance

    Insurance Information Institute · Opening paragraphs (professional services/advice and E&O name); Claims not covered by general liability; What types of businesses need professional liability insurance?; What’s covered… and what’s not (claims-made versus occurrence, defense and judgments, non-financial/intentional limits, BOP/in-home exclusion) · accessed 2026-09-16

  3. 03
    Executive and Professional Liability | MMA

    Marsh McLennan Agency · E&O, architects and engineers, and lawyers professional lines are named in the policy suite. · accessed 2026-09-30

  4. 04
    Errors and Omissions Insurance

    Nationwide · E&O page; professional-services liability and coverage overview. · accessed 2026-09-30

  5. 05
    FAQ: Professional liability insurance

    Texas Department of Insurance · What’s professional liability coverage?; What types of damages…; What’s general liability insurance?; Do I need professional liability… if I have general liability…?; Is professional liability insurance required?; Can a client require…?; What’s the difference between occurrence policies and claims-made policies · accessed 2026-09-16

  6. 06
    Get business insurance

    U.S. Small Business Administration · Six common types of business insurance table · accessed 2026-09-16

Areas of coverage

Marsh McLennan Agency

  • role: Marsh McLennan Agency describes arranging professional errors omissions for the audience stated on the cited product page. professional errors omissions marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.company-reportedSource ↗
  • eligibility: Organizations seeking professional liability placement; source does not imply all professions share one policy. professional errors omissions marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.company-reportedSource ↗
  • coverage: The cited product page describes E&O and named specialist professional lines, including architects and engineers and lawyers professional liability; the overview does not treat them as one form. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. professional errors omissions marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.company-reportedSource ↗
  • application: The page invites organizations to contact a Marsh McLennan Agency adviser or specialist to discuss placement. The page does not establish a quote, bind, or coverage-effective timeline. professional errors omissions marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.company-reportedSource ↗
  • limits: The cited overview does not set a universal limit or retention for this line. Ask for the proposed policy form, limits, retentions, exclusions, and conditions in the quote. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred.not-disclosedSource ↗

Nationwide

  • role: Nationwide describes offering professional errors omissions for the audience stated on the cited product page. professional errors omissions marketed by nationwide; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.company-reportedSource ↗
  • eligibility: Professionals and businesses providing services to others as described by Nationwide; exact eligible classes depend on underwriting. professional errors omissions marketed by nationwide; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.company-reportedSource ↗
  • coverage: The cited product page describes E&O insurance for claims alleging errors or omissions in professional services, as described on Nationwide's product page. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. professional errors omissions marketed by nationwide; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.company-reportedSource ↗
  • application: The page directs prospective customers to contact an agent or request a quote. The page does not establish a quote, bind, or coverage-effective timeline. professional errors omissions marketed by nationwide; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.company-reportedSource ↗
  • limits: The cited overview does not set a universal limit or retention for this line. Ask for the proposed policy form, limits, retentions, exclusions, and conditions in the quote. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred.not-disclosedSource ↗

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