GoogleMaps Location of Costco

Contact Information

Corporate Headquarters

Corporate Headquarters
999 Lake Drive
Issaquah, WA 98228

Mailing Address:

P.O. Box 34718
Seattle, WA 98124

Pharmacy Reimbursement Questions

If you have concerns about reimbursement contact Costco Health Solutions at 1-877-908-6024 or email Concerns or appeals of decision may be submitted within 90 days of notice of the issue, no particular form is required. initial appeal process is available for all prescription drugs or devices for which a pharmacy alleges it did not receive its actual cost


Please contact Costco Health Solutions Customer Care toll- free at the number listed on your pharmacy benefit member ID card.

TTY (Toll- Free): 1-877-908-6024
Hours: 24 hours a day, 7 days a week

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