Back Pain Claims: Understand VA Disability Benefits

The Secondary Conditions Most Veterans Miss

You're rated 20% for lumbosacral strain under Diagnostic Code 5237. Your back hurts, you can't bend past 60 degrees, and you've got shooting pain down your right leg every time you stand up. Here's what the VA won't tell you: that leg pain is a separate claim worth another 10% to 40% under DC 8520 for sciatic nerve paralysis, and it stacks on top of your existing back rating. Most veterans never file it. They assume the nerve damage is "part of the back thing" and leave thousands of dollars on the table every year because they don't understand that VA regulations treat the spine injury and the nerve damage it causes as two distinct disabilities. This isn't theoretical. A veteran rated 20% for lumbosacral strain ($356.66/month in 2026) who also qualifies for 20% secondary radiculopathy jumps to a combined 40% rating ($795.84/month). That's $439.18 more every month--$5,270.16 annually, for documenting symptoms you already have. The same logic applies to secondary hip arthritis from limping, secondary knee degeneration from compensatory gait, and secondary foot conditions from altered weight distribution. These aren't bonus claims. They're separate diagnostic codes the VA created specifically because your back injury caused damage elsewhere.

Why Radiculopathy Gets Its Own Rating

DC 5237 rates lumbosacral strain based on range of motion measurements: forward flexion, extension, lateral flexion. That's the mechanical damage to your spine. DC 8520 rates sciatic nerve paralysis based on neurological symptoms: radiating pain, numbness, tingling, weakness, or loss of reflexes in the leg. The VA doesn't double-compensate for the same impairment, but these aren't the same impairment. One is joint damage. The other is nerve damage caused by that joint damage. Here's the rating schedule for DC 8520: - 10%: Mild incomplete paralysis (pain radiating down the leg, no significant motor loss) - 20%: Moderate incomplete paralysis (pain plus numbness or mild weakness) - 40%: Moderately severe incomplete paralysis (constant pain, significant weakness, difficulty walking) - 60%: Severe incomplete paralysis (marked atrophy, foot drop) - 80%: Complete paralysis Most veterans with chronic lower back conditions qualify for 10% or 20%. You don't need an MRI showing a bulging disc. You need a nexus statement from a doctor, any doctor, including a private physician, saying "the veteran's radiculopathy is at least as likely as not caused by or aggravated by the service-connected lumbosacral strain." The VA's own C&P examiners routinely document nerve symptoms during back exams but never connect them to a separate rating because that's not their job. It's yours.

Secondary Joint Damage From Altered Gait

Your back hurts, so you limp. You favor your left leg. You shift your weight forward onto your toes to avoid bending at the waist. Over five years, that compensatory movement pattern destroys your hip, knee, or foot. That's not speculation, it's biomechanics. And it's service-connected under 38 CFR § 3.303(a) as a secondary condition if you can show the lower back disability caused the joint damage. Common secondary claims from lower back conditions: - Hip osteoarthritis (DC 5003): Rated on limitation of motion under the hip codes (DC 5251-5253) and pain on weight-bearing - Knee degenerative arthritis (DC 5260-5261): Rated 10% to 30% based on pain, swelling, instability, or cartilage damage confirmed by X-ray or MRI - Plantar fasciitis or pes planus (DC 5276-5284): Rated 10% to 30% if bilateral and severe The nexus requirement is the same: a medical opinion stating the secondary condition is at least as likely as not caused or aggravated by the service-connected back disability. Private doctors can write these. You don't need a VA examiner to agree. The VA must order a C&P exam if you submit a credible nexus statement and there's no existing evidence to deny the claim outright.

What C&P Examiners Miss (And How to Fix It)

Let's walk through a real example. Staff Sergeant Torres is rated 20% for lumbosacral strain with forward flexion limited to 60 degrees. He's had shooting pain down his right leg for three years. He limps noticeably when he walks more than 100 yards. His right knee aches constantly. He filed his initial back claim in 2021 and never mentioned the leg pain, the limp, or the knee because he thought "it's all connected." Torres requests a rating increase for his back in 2025. The C&P examiner measures his range of motion (still 60 degrees, no increase) and notes "radiating pain to right lower extremity, positive straight leg raise at 45 degrees" in the exam report. The VA denies the increase. Torres doesn't appeal. He's leaving money on the table. What Torres should have done: filed two separate claims the day he got that C&P report. First, a secondary claim for right lower extremity radiculopathy under DC 8520, citing the examiner's own documentation. Second, a secondary claim for right knee degenerative arthritis under DC 5260, with a lay statement on VA Form 21-4138 describing his altered gait and a buddy statement from his wife confirming she's watched him limp for three years. If Torres gets 10% for radiculopathy and 10% for the knee, his combined rating jumps from 20% to 40%--$439.18 more per month without proving his back got worse.

Buddy Statements and the Gait Documentation Gap

C&P examiners see you for 20 minutes on a day you probably took ibuprofen and tried to walk normally. They don't see you at home. They don't see you struggling to get out of your truck after a long drive. They don't see your limp at the end of a 10-hour shift. That's why buddy statements from family members, fellow veterans, or coworkers carry weight under 38 CFR § 3.303(a). The regulation allows lay evidence to establish secondary service connection if it's credible and consistent with medical evidence. A strong buddy statement for a secondary knee or hip claim includes: - How long the witness has known you - Specific observations of limping, favoring one leg, or altered gait - Frequency and context (daily, after work, when carrying weight) - Changes over time (wasn't limping in 2019, started noticeably limping by 2021) You can find detailed guidance on building secondary claims, including nexus letter templates and evidence checklists, in "A VA Disability Claims Manual for the Rest of Us". The book walks through exactly what to submit, in what order, and how to frame your argument so the VA can't ignore it.

Filing the Secondary Claim

You file secondary claims the same way you filed your original claim: VA Form 21-526EZ, Section IV, "New Disabilities." List the condition (e.g., "right lower extremity radiculopathy secondary to service-connected lumbosacral strain"). Attach your nexus statement, your lay statement, any private medical records showing the secondary condition, and buddy statements if you have them. The VA will schedule a C&P exam for the secondary condition. Do not wait for your back rating to increase before filing secondary claims. Do not assume the VA will "figure it out" from your existing file. They won't. The VA rates what you claim, not what you have. If you want more information on how secondary conditions work across the board, check out our full guide to secondary service connection.

Bottom Line

If you're rated for a lower back condition and you have leg pain, numbness, weakness, or you've developed a limp that's wrecked your knees or hips, you're leaving money on the table. Radiculopathy gets its own rating under DC 8520. Hip and knee damage from altered gait get their own ratings under separate diagnostic codes. File the claims. Get the nexus statements. Document the functional impact. The VA won't connect the dots for you, but the regulations allow you to do it yourself if you know where to look.