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Your Mayo Clinic number is a 7, 8 or 9-digit number we assign to you as a new patient prior to your first visit. You can find it near the top of a range of documents, including pre-visit questionnaires, clinical notes, care summaries, and correspondence.
If you do have Mayo paperwork handy, it's often quickest simply to look for it there. Scroll down to see some examples of how the number shows up: