What is the difference between a Nexus and IMO letter? Which is better to file a claim or appeal with? Thanks.
A nexus letter or an Independent Medical Opinion are more or less the same thing. 'Nexus' is simply a word meaning connection.
Either document would try to establish service connection for a disabling condition by allowing an expert to review records and make an opinion. Read more here https://www.vawatchdog.org/imo-ime-medical-opinions-exams.html