Lumbar Spine (Low Back) Claims Guide
Low back conditions, usually lumbosacral strain or degenerative disc disease, are among the most-filed VA claims, and they are rated under the same General Rating Formula the VA uses for the whole spine. The rating turns mostly on how far you can bend forward and your total range of motion, with a separate path for disc disease measured by flare-up bed rest, and separate add-on ratings for the sciatica that so often comes with a bad back. This guide breaks down the formula, the numbers, and the evidence that wins.
How the Spine Formula Works
The low back is rated under the General Rating Formula for Diseases and Injuries of the Spine (38 CFR 4.71a), the same formula used for the neck. The key point: the formula applies no matter the exact diagnosis, lumbosacral strain (DC 5237), degenerative arthritis (DC 5242), or disc disease all use the same range-of-motion table. You are measured on forward flexion (bending forward) and combined range of motion (all six trunk movements added together).
For VA purposes, normal thoracolumbar motion is: forward flexion 0 to 90 degrees, extension 0 to 30, left and right lateral flexion 0 to 30 each, and left and right rotation 0 to 30 each, for a normal combined total of 240 degrees.
The Low Back Rating Table
| Rating | Criteria (thoracolumbar spine) |
|---|---|
| 50% | Unfavorable ankylosis of the entire thoracolumbar spine (the low back fused in a bad position). |
| 40% | Forward flexion limited to 30 degrees or less; or favorable ankylosis of the entire thoracolumbar spine. |
| 20% | Forward flexion greater than 30 but not more than 60 degrees; or combined range of motion not greater than 120 degrees; or muscle spasm or guarding severe enough to cause an abnormal gait or abnormal spinal contour. |
| 10% | Forward flexion greater than 60 but not more than 85 degrees; or combined range of motion greater than 120 but not greater than 235 degrees; or muscle spasm, guarding, or localized tenderness not causing an abnormal gait or contour. |
A 100% rating exists only for unfavorable ankylosis of the entire spine (back and neck fused together), which is rare. Whichever measure gets you the higher level applies, so a near-normal flexion number can still reach 20% if muscle spasm causes an abnormal posture or gait.
Disc Disease: The IVDS Alternative
If your low back condition is intervertebral disc syndrome (DC 5243), the VA can rate it either by the range-of-motion table above or by the Formula for Incapacitating Episodes, whichever gives the higher rating. An "incapacitating episode" is a period of acute symptoms that required bed rest prescribed by a physician, over the past 12 months.
| Rating | Incapacitating episodes in the past 12 months |
|---|---|
| 60% | At least 6 weeks total. |
| 40% | At least 4 but less than 6 weeks. |
| 20% | At least 2 but less than 4 weeks. |
| 10% | At least 1 week but less than 2 weeks. |
Leg Symptoms: Separately Rated Sciatica
A bad low back is the number-one cause of sciatica: a pinched nerve root sending pain, numbness, or weakness down the leg. The spine formula expressly directs the VA to rate that associated radiculopathy separately from the back itself, one rating for each affected leg, under the sciatic nerve code. So a single low-back condition can yield a back rating plus one or two leg-nerve ratings, often a substantial add-on. The severity scale and the "wholly sensory" cap are covered in the sciatica and radiculopathy guide. Make sure the exam documents any radiating leg symptoms; it is one of the most commonly missed ratings in a back claim.
Getting the Low Back Service Connected
- Direct: an in-service back injury (a fall, a lifting injury, a vehicle accident, a hard parachute or ejection landing) or documented chronic back complaints in service, plus a current diagnosis and nexus. Heavy load-bearing jobs (rucking, infantry, airborne, mechanics) support the in-service link.
- Secondary: a service-connected lower-extremity condition (knee, ankle, foot) that changed your gait can cause or aggravate the low back. See service connection and the knee/ankle guide.
- Aggravation: service permanently worsened a pre-existing back condition.
Evidence That Wins
- Range-of-motion measurements in degrees, forward flexion and the combined total, taken with a goniometer and including after repetitive use.
- Documented flare-ups and any abnormal gait or posture / muscle spasm, which can reach 20% even with decent flexion numbers.
- For IVDS, physician-prescribed bed-rest records showing the weeks of incapacitating episodes.
- A neurological exam capturing any leg sciatica (side, nerve, reflexes, strength, sensation) so the separate rating is not missed.
- Imaging (X-ray, MRI) confirming the diagnosis, and the back/spine DBQ. See the DBQ guide and C&P exam prep.
Frequently Asked Questions
Does my exact back diagnosis change the rating?
My flexion is decent but my back is always tight and my posture is off. Any rating?
What is the highest back-only rating?
I have shooting pain down my leg. Is that extra?
My flares put me in bed but I never got a prescription for bed rest. Does IVDS still help?
Related Tools and Guides
Sources: 38 CFR 4.71a, General Rating Formula for the spine · CCK Law, low back pain ratings · CCK Law, lumbosacral strain. Educational only, not legal advice, and not a prediction of any individual claim. Rating criteria change; confirm current details in 38 CFR 4.71a. For help with your claim, find a VA-accredited representative.