There are many, many other longhorned beetles that live in dead/dying wood. Even PhD entomologists can't always ID ALB from the larvae alone - they need to rear it to adulthood.
Are there other holes in the wood? One thing a little unique is that ALB makes a straight line from the center of the tree out when it emerges. When I worked at the State and would get ALB calls, I'd tell them to stick a pencil in the hole. If the hole is too small for a pencil, not ALB. If the pencil doesn't go in very far, not ALB.
Start with a local Extension office or the state department of agriculture. If it is ALB, they certainly want to know...
Always good to double check when you are suspicious!