"Nexus" is the VA's word for the link between a current condition and something that happened in service. For most claims the VA needs medical evidence of that link, not just your say-so. A nexus letter is a doctor putting that link in writing.
What a good one says
- The opinion, in the VA's language. That your condition is "at least as likely as not" (a 50% or greater probability) caused by, or the result of, your service or a service-connected condition. Weaker phrasing like "may be related" or "could be" is usually treated as no opinion at all.
- The reasoning. Why the doctor thinks so: what in your service records, your treatment history, and the medical literature supports the link. A conclusion without a rationale carries little weight.
- What was reviewed. That the doctor read your service treatment records, your claims file or relevant records, and examined you or reviewed your current medical evidence.
- The doctor's credentials. Name, specialty, and signature. A specialist in the condition carries more weight than a generalist.
Who can write one
Any licensed medical professional qualified to speak to the condition: your treating doctor, a specialist, or an independent provider who reviews your records for this purpose. Your own doctor knows you best but may not know what the VA needs the letter to say. An independent provider knows the format but needs your records to be thorough. Either can work if the letter has the four parts above.
When you need one, and when you don't
- Usually needed: a condition that showed up after service, a secondary condition, a condition the VA already denied for "no nexus," or anything where the service records are thin.
- Usually not needed: a presumptive condition with qualifying service, a condition diagnosed and treated in service that has continued since, or a claim filed within a year of separation for a condition documented at separation.
The VA's own claim exam (the C&P exam) often includes a medical opinion. When that opinion goes against you, a well-reasoned private nexus letter is how you answer it.
How we help
We read your records first and tell you honestly whether a nexus opinion is likely to be needed and what it would have to address. If it is, we help you get the right records in front of the right provider, so the letter is grounded in your file and not written blind.
Have questions about your own situation?
Request a free consultation call. Someone from our team will call you within one business day, talk through where you are, and tell you plainly whether we can help. No cost, no obligation.