King County and its labor partners have engaged our trusted vendor Mercer Consulting to conduct a routine eligibility verification of the dependents enrolled in our health plans. If you cover a family member on your King County medical, dental, or vision plan, look for information from Mercer regarding the dependent eligibility verification process you are required to complete.

On June 18, Mercer sent instructions and your Audit ID by mail and email. These communications are legitimate—please do not delete. Use your Audit ID to access the Mercer Secure Website, where you can upload documentation and complete the verification process for each family member.

Documents proving eligibility for each enrolled dependent must be received by Mercer by July 29, 2024. Failure to do so will result in the dependent being removed from coverage on Sept. 30, 2024.

Dependent verification audits are conducted approximately every 5–10 years and are a best practice among employers to help manage regulatory compliance and rising health insurance costs.

For more information, see the FAQ, watch the Dependent Eligibility Verification Website Demo,  or watch the overview video in English, Spanish, Russian, Vietnamese, or Simplified Chinese. If you have additional questions about this process or the eligibility of your covered family members, please contact Mercer at 866-703-3763.