Getting a nexus letter used to mean hunting for the right specialist in your city, making an appointment, waiting weeks, and hoping they understood VA claim requirements. Telehealth has changed that entirely. In 2026, veterans can get a board-certified specialist's written medical opinion connecting their condition to their military service — without leaving their home. This guide walks you through exactly how to do it right.
A nexus letter is a written medical opinion from a licensed physician that establishes the causal connection — the "nexus" — between your military service and your current medical condition. It is one of the three elements required for VA service connection under 38 CFR 3.303:
Without a nexus, VA denies claims even when a veteran clearly has a condition and clearly experienced the in-service event. A nexus letter fills that gap when VA's own C&P exam doesn't — or when the C&P examiner's opinion works against you.
A telehealth nexus letter is simply a nexus letter where the physician's consultation with you occurred via video call or phone rather than in person. The letter itself is identical. VA regulations do not require the physician to physically examine you — they require a competent medical opinion supported by reasoning. Telehealth delivers that at a fraction of the logistical cost.
The VA's own C&P (Compensation and Pension) examiners produce the medical opinions that raters use to make decisions. When that examiner's opinion is negative — "less likely than not" connected to service — the veteran faces an uphill battle. A private nexus letter doesn't erase the C&P report, but it creates a conflict of medical evidence that VA is required to resolve by giving the veteran the benefit of the doubt under 38 CFR 3.102.
In practice, this matters enormously. Veterans who submit strong private nexus letters have significantly higher win rates at the Board of Veterans' Appeals and in Supplemental Claim reviews than veterans relying solely on the VA's own medical evidence. The BVA routinely grants service connection when a well-documented private nexus letter contradicts an inadequate C&P opinion.
VA uses a 50% probability threshold — not "certainly" or "probably." A nexus letter only needs to establish that it is "at least as likely as not" (50%+) that the veteran's condition was caused by, aggravated by, or originated during their military service. This is a lower bar than it sounds, and a well-qualified specialist who understands VA claims can often meet it honestly.
VA will evaluate your nexus letter the same way it evaluates any medical opinion — based on the physician's qualifications, the quality of the reasoning, and whether the opinion is supported by the record. A letter that simply says "I believe this veteran's condition is service-connected" without explanation will be given little weight.
A VA-compliant nexus letter must include all of the following:
The letter should be on official letterhead, include the physician's name, medical degree (MD or DO), board certification in the relevant specialty, license number, and contact information. VA gives more weight to opinions from specialists in the relevant field — a pulmonologist for lung conditions, a psychiatrist for mental health conditions, an orthopedic surgeon for musculoskeletal claims.
The opinion must reference the records reviewed — service treatment records, VA medical records, private treatment records, and any other relevant documentation. An opinion that doesn't reference specific records appears speculative and may be discounted.
The physician must state a clear conclusion using the VA's probability language: "it is at least as likely as not," "it is more likely than not," or "it is unlikely." Avoid vague phrases like "may have contributed" or "could be related." VA raters need a definitive medical opinion, not hedged speculation.
This is the most important section. The physician explains why they reached their conclusion — the mechanism by which the in-service exposure, injury, or illness caused or contributed to the current condition. This section cites medical literature, medical studies, known pathological mechanisms, and the specific facts of the veteran's service. Without this section, the opinion has no evidentiary weight.
The letter must be signed by the physician and dated. An undated or unsigned opinion will be rejected on procedural grounds before it's even evaluated on the merits.
The quality of your nexus letter depends heavily on the quality of the information you give the physician. Before your telehealth consultation, gather and organize the following:
Write a one-to-two page summary of the in-service events, exposures, or injuries relevant to your condition. Include dates, locations, units, and specific details. This is the factual foundation for the physician's opinion. The more specific you are — "I was stationed at FOB Salerno from March to November 2010 and worked adjacent to the burn pit, which burned continuously" — the stronger the nexus the physician can document.
If fellow service members can corroborate your in-service exposures or the onset of your symptoms, bring their written statements. These aren't medical evidence, but they support the factual foundation the physician relies on.
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Services like REE Medical specialize in providing nexus letters and IMOs for VA claims. Their physicians are specifically trained on VA rating standards, 38 CFR Part 4 diagnostic codes, and the legal requirements for a persuasive nexus opinion. The consultation happens via telehealth, and the resulting letter is written to VA evidentiary standards. This is the highest-quality option for most veterans, especially those dealing with complex conditions or after a previous denial.
Advantages: VA-specific expertise; physician understands evidentiary standards; letter is structured to address VA's evaluation criteria; often includes supporting literature citations.
Disadvantages: Cost ($500–$1,500 depending on condition and complexity).
If you have an existing relationship with a specialist — a pulmonologist, cardiologist, orthopedist, or psychiatrist — you can request they write a nexus letter. Schedule a telehealth appointment specifically for this purpose, bring all your documentation, and provide the physician with a written request explaining the VA's requirements (the five elements described above).
Advantages: Physician already knows your medical history; potentially lower cost ($200–$500); long-standing patient relationship adds credibility.
Disadvantages: Most civilian physicians have no training in VA nexus letter standards; letters often lack the specific legal language VA requires; VA may give less weight to an opinion that reads like a clinical note rather than a formal medical opinion.
If you go this route, give your doctor a written template or checklist explaining exactly what VA needs. Many physicians are willing to write thorough nexus letters — they just need guidance on what the letter must include. You can find the VA's DBQ forms on va.gov, which show physicians the format VA examiners use.
VA's Community Care program can refer veterans to outside specialists when VA cannot provide care in a timely manner. In some cases, you can ask your VA primary care physician to refer you to an outside specialist and explicitly request that the specialist document a nexus opinion. This is free, but the quality varies — most community care providers don't know VA nexus letter standards, and some refuse to write nexus letters at all because they're unfamiliar with the legal context.
Advantages: No cost to the veteran.
Disadvantages: Quality is unreliable; provider may decline; VA cannot direct the physician on what to write; can take months for the referral to be scheduled.
| Option | Typical Cost | Timeline | VA-Specific Expertise |
|---|---|---|---|
| Nexus letter service (e.g., REE Medical) | $500–$1,500 | 2–4 weeks | High — VA-trained physicians |
| Your civilian specialist (telehealth) | $200–$500 | 4–8 weeks | Low–Medium — depends on doctor |
| VA Community Care referral | $0 | 6–16 weeks | Low — physician may decline |
Consider the cost in context: if your nexus letter results in a 30% rating, that's $552.47/month — $6,629 annually, tax-free, for the rest of your life. Even a $1,500 nexus letter that wins your claim pays for itself in under three months. If you're filing a new claim or appealing a denial, the cost-benefit calculation almost always favors the professional service.
Yes. VA regulations require that all competent medical evidence be considered regardless of how the physician-patient consultation occurred. 38 CFR 3.303 does not distinguish between in-person and telehealth opinions. The relevant question is whether the opinion is:
VA may attempt to discount a telehealth nexus letter by claiming the physician didn't perform a physical examination. This is a common rater error. The Federal Circuit has ruled that VA cannot reject a nexus opinion simply because the physician did not conduct a full physical examination — medical opinions for service connection can be based on a review of records alone. If VA rejects your nexus letter on these grounds, that rejection is appealable and often successfully overturned.
If your rating decision says the private nexus letter was given "little to no weight" because the physician "did not examine" you, that is a legal error under Nieves-Rodriguez v. Peake (Fed. Cir. 2008) and related cases. Document this language and raise it in your appeal. An accredited VA attorney can help you challenge inadequate rating decisions.
Once you have your nexus letter, how you submit it depends on where you are in the claims process:
If you haven't filed yet, include the nexus letter with your initial claim submission. File as a Fully Developed Claim (FDC) and certify that all relevant evidence has been submitted. This eliminates the VA's evidence-gathering stage and moves your claim directly to the rating phase. Upload the nexus letter via va.gov, mail it to your Regional Office, or submit it through an accredited VSO.
If you were previously denied and now have a nexus letter, file a Supplemental Claim. The nexus letter qualifies as "new and relevant evidence" under 38 CFR 3.2501 — exactly the standard required to reopen a denied claim. VA must conduct a full review and cannot simply restate the original denial reasons. Learn more about the Supplemental Claim process here.
If you've appealed to the Board of Veterans' Appeals on the Evidence Submission docket, you can submit the nexus letter within 90 days of filing your Notice of Disagreement. BVA judges give independent weight to private medical opinions and are not bound to defer to the Regional Office's evaluation of the evidence.
A brilliant cardiologist who has never written a VA nexus letter may produce an opinion that's medically accurate but legally ineffective. The language, structure, and citation requirements are specific to VA claims. Either choose a service that specializes in VA nexus letters, or thoroughly brief your civilian physician on what the letter needs to contain before the appointment.
If the physician can only write "I reviewed the veteran's statement that they were exposed to burn pits" rather than "I reviewed the veteran's service treatment records dated 2009–2011, which document respiratory symptoms beginning in March 2010," the opinion is weaker. Give your physician every relevant document.
Phrases like "it is possible that," "may have been caused by," or "could be related to" do not meet VA's standard. The opinion must use "at least as likely as not," "more likely than not," or equivalent language. Review the final letter before submitting it — if the probability language is vague, ask the physician to revise it.
A nexus letter submitted to the wrong lane (e.g., to an HLR instead of a Supplemental Claim) may not be considered. Know which claims lane you're using and ensure the nexus letter is submitted as evidence for that specific claim. Understand the full VA claim timeline before filing.
The nexus letter must specifically address the condition you've claimed and the diagnostic code that corresponds to it. If you claimed "respiratory condition" but the nexus letter addresses "asthma" and your rater is evaluating you under a different diagnostic code, there may be a mismatch. Work with a VSO or attorney to make sure your nexus letter aligns precisely with the conditions on your claim. See our complete nexus letter guide for the full framework.
Yes. VA regulations require consideration of all competent medical evidence regardless of how the consultation occurred. VA cannot reject a nexus letter solely because it was obtained via telehealth. The relevant criteria are the physician's qualifications, the quality of the reasoning, and whether the opinion is supported by a review of relevant records. See 38 CFR 3.303 and the Federal Circuit's decisions in Nieves-Rodriguez v. Peake and related cases.
Specialized nexus letter services typically deliver within 2–4 weeks of your telehealth consultation. Your civilian specialist may take 4–8 weeks. Plan around any pending VA deadlines — if you have a Supplemental Claim response due in 60 days, start the process immediately.
A nexus letter specifically addresses service connection — whether your condition is linked to military service. An Independent Medical Opinion (IMO) is broader and can address diagnostic accuracy, rating adequacy, or other medical questions. For most service connection claims, a nexus letter is sufficient. An IMO may be warranted for complex claims involving disputed diagnoses or secondary conditions. See our IMO vs. Nexus Letter comparison guide.
Yes — it's one of the most effective tools for overturning a denial. When VA denied your claim for "lack of nexus" (no medical evidence connecting service to condition), a private nexus letter directly fills that gap. File a Supplemental Claim with the letter as new and relevant evidence. VA must conduct a full review and give the letter appropriate evidentiary weight.
Any condition where the service connection isn't obvious from the records alone. Conditions that frequently benefit include: respiratory conditions linked to burn pit exposure, PTSD secondary conditions (sleep apnea, hypertension, GERD), musculoskeletal secondary claims, Gulf War multi-symptom illness, and toxic exposure claims under the PACT Act. Check our free nexus letter options guide for more resources.