Getting a denial letter from the VA is frustrating, but it's not the end of the road. Most veterans who eventually get service-connected were denied at least once first. The question is which path forward makes sense for your situation.
Start by reading the denial letter carefully. Not the form language at the top, but the specific reasons they gave for denying your claim. The VA is required to tell you exactly what was missing. Common reasons include: no current diagnosis, no evidence of an in-service event, no medical nexus linking the two, or a C&P examiner who gave a negative opinion. Your next step depends entirely on which of those gaps caused the denial.
You have three options, and they're not interchangeable.
A supplemental claim is the right move when you have new and relevant evidence the VA hasn't seen before. If your claim was denied because there was no medical nexus, submitting a nexus letter from a physician who reviewed your records counts as new evidence. If you were denied because there was no current diagnosis and you've since been diagnosed, that medical record is new evidence. File on VA Form 20-0995 and include the new evidence. This is the most common path for veterans who were denied for lack of a nexus opinion.
A higher level review is the right move when you believe the VA made an error with the evidence they already had. Maybe the rater ignored a favorable medical opinion, misread your service treatment records, or didn't apply the benefit of the doubt correctly. A senior reviewer looks at the same evidence with fresh eyes. You can request an informal conference to explain where you think the error was. You cannot submit new evidence on a higher level review, so if the problem was missing evidence, this isn't your path.
A Board appeal goes to a Veterans Law Judge. This is typically the longest route and is best reserved for cases where you've exhausted the other two options or where there's a genuine legal question about how the VA interpreted the evidence.
The most important thing: don't just refile the same claim with the same evidence. If the VA denied you because they didn't see a connection to service, submitting the exact same records again will get you the exact same result. You need something new, whether that's a diagnosis, a nexus letter, additional service records, or buddy statements that weren't in the original file.
$50 record review fee at intake. $350 only if we can support your claim.