[Eddies66]

Are you looking to file a claim with the VA: Veteran Nexus Letter makes the decision a littler easier:

A Nexus Letter is a medical document prepared for a claimant by a medical professional that explicitly demonstrates a relationship between medical issues (secondary conditions) and/or an in-service event to the current medical condition for which a claimant is seeking compensation. A claimant is not required to submit a nexus letter, but such a letter can make the difference between an award and a denial. A nexus letter can be submitted with an initial application, during claim development, or after an adverse C&P exam. Submitting a properly worded nexus letter as early as possible in the process, however, is good practice.
A nexus letter is especially important in cases where a claimant has not submitted any medical evidence and a C&P examiner concludes that there is no connection between a claimant’s condition and military service. Without a nexus letter, the claim will be denied. Even when a claimant supplies supporting medical evidence with an application, VA raters can and often do choose the opinion of the VA examiner over a private physician’s opinion for many reasons. In such a case, a “nexus letter” from a private physician is necessary to respond to the C&P examiner’s conclusion.