Contact Us to Become a Kidney Companion. Kidney Companionsmolly@kidneycompanions.orgPO Box 325Traverse City, MI 49695 Submit your interest Newsletter Block This newsletter signup form needs a storage option. Edit the block and enter a storage location via the Storage tab. Join our newsletter Sign up with your email address to receive news and updates. First Name Last Name Email Address Subscribe Thank you! You can make a difference. Volunteer to BE A kidney companion today.