Visit AHA's Coding Clinic Advisor site and click the "Submit a Question" button. You will first need to login using your Coding Clinic Advisor account (this is different from your www.aha.org account). If you have never been to the Coding Clinic Advisor site before, you will need to create a new account.
More information about submitting questions can be found on this page.
Additional contact information for Coding Clinic Advisor can be found here.