How to file a VA musculoskeletal claim — back, neck, knee and ankle under 38 CFR 4.71a, painful motion, IVDS incapacitating episodes and the bilateral factor
Back, neck, knee and ankle conditions are rated under 38 CFR 4.71a mostly by measured range of motion, with pain, weakness, fatigue and flare-ups counted as functional loss under 4.40 and 4.45. The spine formula rates the thoracolumbar and cervical spine by forward flexion, combined range of motion, muscle spasm and ankylosis from 10% to 100%; intervertebral disc syndrome may instead be rated by physician-prescribed bed rest under the incapacitating-episodes formula (10–60%). Knees are rated for limited flexion (DC 5260), limited extension (5261) and instability (5257, which since 2021 turns on prescribed braces and assistive devices); ankles under 5271 by dorsiflexion and plantar flexion; arthritis shown on X-ray that limits motion gets at least 10% per major joint (5003), and a painful joint gets at least the minimum compensable rating (4.59). Separate ratings for each joint are combined under 4.25, and paired arms or legs get the bilateral factor (4.26). Radiculopathy and other nerve findings are rated separately.
What you'll need
- VA Form 21-526EZ
- Service treatment records: sick call notes, physical profiles, injury reports, separation exam (request missing records from the National Personnel Records Center)
- Current treatment records, imaging (X-ray, MRI) and any physician-prescribed bed rest or activity restrictions
- Lay statements from people who saw the injury or the symptoms since service
- A nexus opinion when the condition was not documented in service or is claimed as secondary
- A free accredited representative (CVSO or VSO)
Step-by-step
Step 1: Establish the connection to service
Direct service connection needs a current diagnosis, an in-service injury, disease or event, and a link between them (38 CFR 3.303). Documented injuries, profiles and sick-call visits are the strongest evidence; when records are thin, lay statements about the injury and continuing symptoms, the physical demands of your duties (load carriage, parachuting, vehicle crews, repetitive lifting) and a clinician's opinion that the current condition is at least as likely as not related to that service fill the gap. Arthritis diagnosed within one year of separation is presumptively service-connected (3.307, 3.309(a)). A condition caused or worsened by a service-connected one — a back problem from an altered gait after a knee injury, for example — is claimed as secondary under 3.310.
Step 2: Know how the spine is rated
The General Rating Formula for Diseases and Injuries of the Spine (DC 5235–5243) rates with or without pain: 10% for thoracolumbar forward flexion greater than 60 but not greater than 85 degrees, cervical forward flexion greater than 30 but not greater than 40 degrees, combined thoracolumbar motion greater than 120 but not greater than 235 degrees, combined cervical motion greater than 170 but not greater than 335 degrees, or muscle spasm, guarding or localized tenderness, or a vertebral fracture with 50% loss of height; 20% for thoracolumbar flexion greater than 30 but not greater than 60 degrees, cervical flexion greater than 15 but not greater than 30 degrees, combined thoracolumbar motion of 120 degrees or less, combined cervical motion of 170 degrees or less, or spasm or guarding causing an abnormal gait or spinal contour; 30% for cervical flexion of 15 degrees or less or favorable ankylosis of the entire cervical spine; 40% for thoracolumbar flexion of 30 degrees or less, favorable ankylosis of the entire thoracolumbar spine, or unfavorable ankylosis of the entire cervical spine; 50% for unfavorable ankylosis of the entire thoracolumbar spine; 100% for unfavorable ankylosis of the entire spine. Normal thoracolumbar forward flexion is 0 to 90 degrees and cervical 0 to 45 degrees. Neurologic abnormalities such as radiculopathy or bowel or bladder impairment are rated separately (Note 1).
Step 3: Intervertebral disc syndrome has a second formula
IVDS (DC 5243) is rated under the general formula or, if higher, by incapacitating episodes: 10% for a total of at least one week but less than two in the past 12 months, 20% for at least two weeks but less than four, 40% for at least four weeks but less than six, and 60% for at least six weeks. An incapacitating episode is a period of acute signs and symptoms that requires bed rest prescribed by a physician and treatment by a physician — self-imposed rest does not count, so the prescriptions and visit notes are the evidence. If disc disease affects more than one spinal segment with clearly distinct effects, each segment is rated separately.
Step 4: Know how knees and ankles are rated
Knee flexion (DC 5260): 0% limited to 60 degrees, 10% to 45, 20% to 30, 30% to 15. Knee extension (5261): 0% limited to 5 degrees, 10% to 10, 20% to 15, 30% to 20, 40% to 30, 50% to 45; limited flexion and extension of the same knee can be rated separately. Knee instability (5257, revised 2021): 30% for an unrepaired or failed complete ligament tear with persistent instability where a provider prescribes both an assistive device and a brace; 20% where a provider prescribes a brace and/or assistive device for a sprain, incomplete tear or repaired tear, or either one for an unrepaired or failed complete tear; 10% for persistent instability without a prescribed device. Ankle (5271): 20% for marked limitation (less than 5 degrees dorsiflexion or less than 10 degrees plantar flexion) and 10% for moderate (less than 15 degrees dorsiflexion or less than 30 degrees plantar flexion). Degenerative arthritis shown on X-ray is rated on limitation of motion, with 10% for each major joint whose limitation is otherwise noncompensable (5003), and a joint that is actually painful, unstable or malaligned from healed injury gets at least the minimum compensable rating (4.59).
Step 5: File, attend the exam, and understand combining
File VA Form 21-526EZ listing every joint or spinal segment you are claiming; VA rates only what is claimed or reasonably raised by the record. At the claim exam the examiner measures range of motion with a goniometer, records where pain begins, repeats the motion, and asks about flare-ups and functional loss — answer accurately, including what you cannot do during a flare-up, because 4.40 and 4.45 require that loss to be considered. Each rating is then combined, not added, under 4.25 (a 20% and a 10% combine to 28, rounded to 30%). When both arms or both legs are affected, the bilateral factor (4.26) adds 10 percent of the combined value of those paired ratings before combining with the rest.
Critical tips
- Radiculopathy, sciatica or numbness from a service-connected spine condition is a separate rating under the peripheral nerve codes — claim it.
- A knee or back condition that limits your ability to work may support individual unemployability once ratings reach 60% for one condition or 70% combined with one at 40% (38 CFR 4.16).
- If a condition has worsened since the last decision, file for an increase (VA Form 21-526EZ) with current treatment records rather than a Supplemental Claim.
- Veterans whose service-connected musculoskeletal conditions limit work can apply for Veteran Readiness and Employment (Chapter 31).
- A county veterans service officer can request your service treatment records and file the claim for free: warriorsfund.org/find-cvso.
- In crisis: dial 988 then press 1, or text 838255.
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