What is the difference between a Nexus letter and an IMO in VA disability?

Physician Assistant and prior C&P examiner Leah Bucholz discusses What is the difference between a Nexus letter and an IMO in VA disability.
Leah explains the terminologies used in the context of VA disability claims. The term "Nexus letter" is commonly known among veterans and is considered slang for "Independent Medical Opinion" (IMO). The presenter prefers the term IMO, viewing it as a more professional and legal definition. They also introduce the concept of a "Nexus statement," which is a declaration about whether a condition is "as likely as not" linked to military service. An IMO is a medical opinion formed after reviewing a veteran's files or sometimes directly examining the veteran, to determine the connection, or "nexus," between their service and their medical condition. In essence, a Nexus letter and an IMO are essentially the same, with the Nexus letter specifically referring to the explanation of the connection between the veteran's service and their condition.