If you cover a family member on your King County medical, dental, or vision plan, look for your Audit ID and instructions for completing the required dependent eligibility verification process sent from Mercer Consulting by mail and email.

King County and its labor unions have engaged trusted vendor Mercer Consulting to conduct a routine eligibility audit to manage regulatory compliance and health insurance costs.

If you deleted the email from Mercer: If you cover a family member on your employee medical, dental, or vision plan, and you did not receive an email from Mercer, look for the letter sent to your mailing address. If you deleted or reported the Mercer email as phishing, you should still receive future notices from Mercer.

If you can’t find your Audit ID: If you didn’t receive an email or letter from Mercer with your Audit ID, please call Mercer at 866-703-3763.

If you don’t have the documents required for verification: For Washington births and marriages, see information about obtaining official documents here. Outside of Washington, an official certificate of every birth, death, marriage, and divorce should be on file in the state, city, or county where the event occurred. The Centers for Disease Control and Prevention lists contacts for each U.S. state and territory. You can also use VitalChek. For a copy of your tax return, go to the IRS website or call the IRS at 800-829-1040.

If your documents are not in English: Please submit a copy of your original document and Mercer will make every attempt to translate it. If Mercer is unable to translate it, you will be placed in an “incomplete status” and Mercer will notify you that an official English translation is required.

The deadline is July 29, 2024: Use your Audit ID to access the Mercer Secure Website, upload documentation, and complete the verification process for each enrolled family member by July 29, 2024. Failure to do so will result in your unverified family member losing coverage on Sept. 30, 2024.

More information:

• FAQ
• Dependent Eligibility Verification Website Demo
  • For employees on the KingCare PPO medical plan, the King County Benefit Access Fee form must be submitted and can be found in the website portal on the left hand menu under the title Helpful Information.
• Overview video: English, Spanish, Russian, Vietnamese, Simplified Chinese
• Contact Mercer at 866-703-3763