🔗Get a Nexus Letter

What It Is

A nexus letter is a medical opinion from a qualified healthcare provider that establishes a CONNECTION between your current disability and your military service. The word "nexus" literally means "link" or "connection."

Why It's Critical

The VA requires three things for a service-connected claim:

1. ✅ A current diagnosis
2. ✅ An in-service event, injury, or exposure
3. ✅ A NEXUS (medical link) between #1 and #2

Without a nexus, even a severe condition with clear service records can be denied.

What It Should Say

The magic language is: "It is at least as likely as not (50% or greater probability) that [CONDITION] was caused by / is related to / was aggravated by [military service / in-service event / service-connected condition]."

Key Elements of a Strong Nexus Letter

1. Doctor's credentials — name, specialty, license number
2. Review of records — "I have reviewed the veteran's service treatment records, VA medical records, and relevant medical literature"
3. Current diagnosis — clearly stated with diagnostic criteria
4. In-service connection — specific event, exposure, or duty that caused/contributed
5. Medical rationale — WHY the condition is linked to service (this is the most important part)
6. The nexus statement — "at least as likely as not" language
7. Citation of medical literature — studies supporting the link (strengthens the letter significantly)

What Makes a WEAK Nexus Letter

• ❌ "The veteran says his back hurts from service" (no medical reasoning)
• ❌ "It is possible that..." (too speculative — needs to be 50%+)
• ❌ No review of service records mentioned
• ❌ No medical rationale or literature cited
• ❌ Written by someone without relevant medical credentials

What Makes a STRONG Nexus Letter

✅ "After reviewing STRs showing repeated heavy lifting as an 11B Infantryman from 2008-2012, current MRI findings of L4-L5 disc herniation, and medical literature establishing that chronic axial loading is a significant risk factor for lumbar disc disease (Smith et al., J. Spine, 2019), it is my medical opinion that it is at least as likely as not that the veteran's current lumbar degenerative disc disease was caused by physical demands during military service."

Who Can Write One

• Your private doctor or specialist
• An independent medical examiner (IME)
• Nexus letter services (companies that connect vets with doctors who specialize in these)
• NOT a VA doctor (they work for the VA and typically won't write nexus letters)

For Secondary Claims

The nexus letter should state: "It is at least as likely as not that [SECONDARY CONDITION] was caused by OR aggravated by the veteran's service-connected [PRIMARY CONDITION]."

Cost

• Free if your regular doctor will write one
• $500-$2,000 from independent medical examiners
• Some VSOs can help obtain them at reduced cost

Pro Tips

• Provide your doctor with your service records, current medical records, and a summary of your service duties
• Point your doctor to relevant medical studies supporting the link
• Make sure they use the "at least as likely as not" language — "possibly" or "could be" won't cut it
• A specialist's opinion carries more weight than a general practitioner
• Get the nexus letter BEFORE your C&P exam if possible