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Nexus Letters for Back Pain
Licensed Physician, MD | Patriot Path Medical Team
Specializing in VA musculoskeletal evaluations and independent medical opinions • Last updated: June 2026
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Back pain is the most claimed VA disability of all. Years of carrying gear, hard landings, and heavy lifting wear the spine down. But a lot of back claims still get denied, usually because the injury was never well documented in service.
A nexus letter can fix that. Our physicians connect your back condition to your service, or to another condition that changed how you move, in the language the VA expects. One flat fee of $1,500, and the first consultation is free.
How VA Rates the Lower Back (DC 5237)
VA rates the lower back under 38 C.F.R. § 4.71a. The main measure is forward flexion: how far you can bend forward at the waist, in degrees, measured at an exam. Less motion means a higher rating.
| Rating | What it generally takes | Monthly pay (approx) |
|---|---|---|
| 10% | Forward flexion greater than 60 but not more than 85 degrees; or muscle spasm or tenderness that does not change your gait or posture; or painful motion (4.59). | ~$180/mo |
| 20% | Forward flexion greater than 30 but not more than 60 degrees; or combined spine motion of 120 degrees or less; or muscle spasm severe enough to change your gait or posture.Most Common | ~$357/mo |
| 40% | Forward flexion limited to 30 degrees or less; or favorable ankylosis of the whole lower spine (fused in a normal position). | ~$796/mo |
| 50% | Unfavorable ankylosis of the whole lower (thoracolumbar) spine. | ~$1,133/mo |
| 100% | Unfavorable ankylosis of the entire spine. | ~$3,939/mo |
If you have disc disease (IVDS), the back can instead be rated on flare-ups a doctor orders bed rest for: 10% (1 to 2 weeks a year), 20% (2 to 4 weeks), 40% (4 to 6 weeks), and 60% (6 weeks or more). The VA uses whichever method, range of motion or IVDS, gives you the higher rating.
Pay figures are approximate 2026 rates (effective December 1, 2025) for a single veteran with no dependents. Check VA.gov for current amounts.
Estimate your likely back rating
This estimates your likely lower-back rating from how far you can bend forward and from flare-ups. A doctor measures bending with a tool at an exam, so treat this as a rough guide, not a rating.
Making a VA Disability Claim for Back Pain
When you file a VA disability claim for your back, three things need to line up:
A current diagnosis
A diagnosed back condition, usually backed by an exam and imaging such as an X-ray or MRI.
A service connection
Either a back injury or strain in service, or a link to another service-connected condition that changed how you move.
A medical nexus
A qualified opinion that the back condition is 'at least as likely as not' connected to your service.
The nexus is where most back claims fall apart, especially when the injury was treated with a sick-call visit and never followed up. A nexus letter supplies it: a written medical opinion tying your back to your service. The 'at least as likely as not' standard (a 50% or better chance) comes from the benefit-of-the-doubt rule in 38 U.S.C. § 5107(b), carried out in 38 C.F.R. § 3.102.
How to Connect Your Back to Service
There are a few ways to tie a back condition to your service. For the back, the secondary path is one of the most powerful and most missed.
Direct connection
A back injury or repeated strain happened in service.
- A specific injury. A fall, a hard landing, a lifting injury, or a vehicle accident.
- Wear and tear. Years of rucking, gear, and heavy lifting. A sick-call visit in your records helps a lot.
Secondary connection
Another service-connected condition changed how you move and strained your back (38 C.F.R. § 3.310).
- Altered gait. A bad knee, ankle, or foot makes you walk differently, which strains the back over time.
- Overcompensation. Favoring one side or a leg-length difference loads the spine unevenly.
Aggravation
You had back problems before service, and service made them permanently worse.
- Worsened by service. Symptoms got worse during active duty, beyond normal aging.
Secondary Conditions
Back problems rarely stop at the back. These links can add to your combined rating, so they are worth documenting.
Back pain may be secondary to
- Knee, ankle, or foot conditions. A changed gait from a lower-limb condition strains the back over years.
- Hip conditions. Hip problems shift load onto the spine.
- Leg-length difference. An uneven stride loads one side of the back more.
Conditions that may be secondary to back pain
- Radiculopathy or sciatica. Nerve pain down a leg from the back. It is rated separately and adds to your combined rating.
- Depression or anxiety. Chronic pain wears on mood and can be claimed as secondary.
- The other side or the hips. Favoring your back can strain other joints over time.
What to Gather - Evidence Checklist
Gather these before you file or ask for a letter. Tick each off as you go.
Frequently Asked Questions
How is the back rated?
Mainly by forward flexion, how far you can bend forward, under 38 C.F.R. 4.71a. If you have disc disease, it can instead be rated on flare-ups that need bed rest, and the VA uses whichever method gives the higher rating.
Does back pain alone get a rating?
Yes. Under 38 C.F.R. 4.59, painful motion earns at least the minimum rating, usually 10%, even if your bending looks near-normal. The VA should also account for weakness, fatigue, and flare-ups.
Can a knee or foot problem cause a back rating?
Yes, and it is common. A service-connected knee, ankle, or foot that changes how you walk can strain your back over time. That is a secondary claim under 38 C.F.R. 3.310.
What about nerve pain down my leg?
Pain, numbness, or weakness shooting down a leg is radiculopathy. It comes from the back but is rated separately under the nerve codes, so it adds to your combined rating.
What does it cost, and how do we start?
Patriot Path charges $1,500 flat for a nexus letter, and the first consultation is free. Book a consultation and a clinician will tell you straight whether a letter can help.
Your back carried the mission. Let your records carry the proof.
Let our physicians prepare a back nexus letter that meets the VA's evidence standards and supports the benefits you earned.
Sources & Regulatory References
- VA disability compensation (VA.gov) https://www.va.gov/disability/
- 38 CFR 4.71a, Schedule of ratings, musculoskeletal system, including the spine formula (eCFR) https://www.ecfr.gov/current/title-38/section-4.71a
- 38 CFR 4.40, Functional loss (eCFR) https://www.ecfr.gov/current/title-38/section-4.40
- 38 CFR 4.45, The joints (eCFR) https://www.ecfr.gov/current/title-38/section-4.45
- 38 CFR 4.59, Painful motion (eCFR) https://www.ecfr.gov/current/title-38/section-4.59
- 38 CFR 3.303, Principles relating to service connection (eCFR) https://www.ecfr.gov/current/title-38/section-3.303
- 38 CFR 3.310, Secondary service connection (eCFR) https://www.ecfr.gov/current/title-38/section-3.310
- 38 U.S.C. 5107, Benefit of the doubt (Cornell LII) https://www.law.cornell.edu/uscode/text/38/5107