A stubborn myth circles veteran communities. It claims a chiropractor can only write a nexus letter for back and neck claims — or cannot write one at all. That myth quietly costs veterans options. So let's dismantle it, not with theory, but with results.

The Proof Is in the Outcomes

The reviews on this site — well over a hundred of them — describe veterans who won claims far outside back-and-neck care. For example:

• One veteran saw his service-connected prostate cancer rating climb from 10% to 60%.
• A Gulf War veteran with burn-pit exposure had been denied twice for sleep apnea. Then he won 50% on appeal, with a nexus letter behind him.
• Others tied cancers and chronic illnesses back to toxic exposures during service.

Most of these claims have nothing to do with the spine. In short, the myth does not survive contact with the evidence.

Where the Myth Comes From

The belief usually takes one of two forms. First, some people think only a medical doctor (MD) can write a nexus letter. Second, others assume a Doctor of Chiropractic (DC) is limited to spine-and-joint claims. However, neither idea matches how the VA evaluates evidence.

What the VA Actually Requires

No VA rule limits nexus letters to medical doctors. In fact, the VA considers opinions from many licensed providers. So it cannot dismiss a nexus letter simply because a chiropractor signed it. Instead, the VA weighs the opinion on its merits. Three things matter most:

• a current, active diagnosis from the appropriate medical professional
• a genuine review of the veteran's records, not a fill-in-the-blank form
• a clear rationale that ties the condition to service under the "at least as likely as not" standard

Because of this, competence and reasoning carry the letter — not the title after the author's name.

Toxic Exposure, Cancer, and TERA

Here is where the myth does the most damage today. Under the PACT Act, conditions linked to a Toxic Exposure Risk Activity (TERA) — burn pits, Agent Orange, radiation, and similar hazards — fall into two groups.

First come the presumptive conditions. For these, the VA presumes service connection, so a nexus letter usually is not required.

Next come the non-presumptive conditions with evidence of toxic exposure. For these, the VA needs a medical nexus opinion. That opinion must connect the diagnosed condition to the in-service exposure, again under the "at least as likely as not" standard.

This second group is exactly where a strong nexus letter earns its keep. For example, it can take a current, specialist-diagnosed cancer and link it to a documented exposure. Yet many veterans still assume a chiropractor cannot help here. The outcomes above prove otherwise.

How These Letters Succeed Beyond Back Pain

The key is simple: understand what a nexus letter does. It does not diagnose the condition. The oncologist, or another treating specialist, does that. Instead, the nexus letter takes that current diagnosis and builds the medical link to service. When it rests on the right diagnosis, a real records review, and a defensible rationale, it stands on its own merits — whatever the author's specialty. In other words, that is exactly how the claims above were won.

What Makes a Nexus Letter Strong

Regardless of who writes it, the strongest nexus letters share the same DNA:

• a current and active diagnosis from the appropriate provider
• a genuine review of the veteran's records
• clear medical reasoning for the connection to service
• the correct standard ("at least as likely as not")
• for toxic exposure, a clear tie between the condition and the documented exposure

The Bottom Line

So, can a chiropractor write a nexus letter? Yes — and not just for back and neck claims. Above all, the veterans on this site are the proof. In the end, your case does not turn on the credentials after a name. It turns on the rigor, competence, and reasoning behind the letter, built on a proper diagnosis. (New to all this? Start with what a nexus letter is.)

One more thing worth knowing: the legal standards for secondary nexus letters changed in 2026. Effective May 1, 2026, the VA updated its secondary service connection causation framework following Spicer v. McDonough. A properly prepared secondary nexus letter — no matter who writes it — must now use "but for" causation language. See The VA Changed the Rules on Secondary Claims: What the New 'But For' Standard Means for Your Nexus Letter (2026) for the full details.

Finally, if you want a thorough, well-supported nexus letter for your claim, you can see how our process works or read more veteran reviews.