Hi I am actually a 20 + year (veteran) credentialing guru that has worked for a large group of providers in Mississippi for over 20 years and I hear this question a lot. The answer is no u do not have to practice the same specialty as ur collaborator. However if u r seeing family med patients your collaborator should have the basic Family or IM training. If tis not trained in Family or IM the BON might not approve ur protocols and will definitely will watch U more closely and that's not apledant experience. But since urologists go through IM training initially or most do, they do have the knowledge and training to advise u if u have a need for this and they can sign off on ur charts each month without any red flags. BUT if ur collaborator was orthopedic surgery u would have a problem since they normally go straight from Nedical School into a Orthopaedic internship/residency program. Does this make sense??