The knee is the joint most often worn down by military service. Ruck marching, parachute landings, running on hard surfaces, climbing in and out of vehicles, and years of standing on concrete all load the same three compartments, and knee conditions are consequently among the most frequently claimed disabilities in the VA system.
They are also among the most frequently misunderstood claims. Some veterans assume a current diagnosis speaks for itself. Others assume that because they never went to sick call for the knee, there is nothing to claim. Neither is accurate, and this guide explains what the VA actually requires.
The three elements of a knee claim
Direct service connection under 38 CFR 3.303 requires the same three things as any claim:
- A current diagnosed disability - degenerative joint disease, a meniscal tear residual, ligament laxity, patellofemoral syndrome, or the residuals of a fracture
- An in-service injury, event, or cumulative exposure
- A medical link between the two, generally expressed as at least as likely as not
What counts as in-service exposure for a knee
Knee claims rarely turn on a single dramatic injury. Parachute operations, dismounted marches, repeated parachuting or helicopter rappelling injuries, athletics, and the sheer volume of load-bearing movement in training all contribute to the same degenerative picture. Records that matter include sick call visits, orthopedic consults, physical therapy notes, and temporary profiles limiting running or marching.
Named diagnoses that appear in these records - chondromalacia, medial or lateral meniscal tears, ACL or MCL sprains, patellar tendinitis - become the anchor for the current diagnosis decades later.
Pain alone is not enough - function is
The VA compensates disability, not discomfort. A knee claim needs a diagnosis and a documented description of what the knee no longer does: how far it bends, how far it straightens, whether it gives way, and what a bad day looks like.
38 CFR 4.40 and 4.45 direct raters to consider functional loss from pain, weakness, fatigability, and incoordination, and 38 CFR 4.59 sets a minimum rating for painful motion. Those provisions only help when the record documents the limitation. Our knee ratings guide shows how each measurement becomes a percentage, and painful motion and loss of function explains the rules most knee ratings actually turn on.
When the service records are silent
Many veterans with knee degeneration never logged a complaint - the knee was simply part of the job. The absence of a sick call entry changes which theory applies, not whether a claim is possible. 38 CFR 3.303(d) permits service connection when a disease diagnosed after discharge is shown to have been incurred in service, and degenerative arthritis is one of the chronic diseases listed in 38 CFR 3.309(a) that can be presumptively connected when it manifests to a compensable degree within one year of separation under 38 CFR 3.307.
The same evidentiary principles that apply to silent spine records apply here. See back pain claims with no in-service complaints for how those claims are built, and our knee evidence guide for the specific records that matter.
Where veterans start
Every case is different, and there is no obligation at any step. When veterans want to understand what their records actually support, these are the two most common starting points:
- Medical records review
A licensed physician reviews your records for a $250 flat fee and identifies which knee conditions the available evidence may support. The fee is refunded in full if nothing supportable is identified.
- Nexus letter
When the records support one, a licensed provider writes the medical opinion that addresses the link between your knee condition and your service or an already service-connected disability.
Secondary service connection
38 CFR 3.310 allows service connection for a condition caused or aggravated by a disability that is already service connected. Knee claims arise this way constantly: an altered gait from a service-connected back, hip, or ankle condition shifts load onto the knee; a service-connected mental health condition can reduce activity and change weight and conditioning in ways that aggravate knee joints.
The direction runs both ways - a service-connected knee can also cause back and hip disabilities through the same altered gait. See back pain secondary to knee and leg conditions for that direction, and knee conditions secondary to back and hip problems for this one.
How the knee is rated
Once service connection is granted, the knee is rated under the schedule in 38 CFR 4.71a. Flexion limitation, extension limitation, instability, and ankylosis each carry their own criteria, and degenerative arthritis is rated on how much motion it takes away, with a 10 percent minimum for painful motion.
Our knee VA ratings guide walks through every percentage, and knee instability and giving way covers the separate evaluation for a knee that buckles.
Where knee claims commonly fail
The recurring problems are evidentiary rather than legal:
- A diagnosis with no medical opinion addressing cause
- Range of motion measured on a good day, with no record of flare-ups or repeated-use testing
- Giving-way episodes described to family but never documented anywhere
- No records from the year after separation, where early arthritis often first appears
- A secondary theory asserted without an opinion connecting it to the service-connected condition
The medical opinion
When the connection to service is the contested element, the evidence that addresses it is a reasoned medical opinion. A useful opinion reviews the actual records, identifies the mechanism - cumulative load-bearing, a specific injury, altered gait - addresses competing causes such as age and civilian occupation, and states a conclusion under the at-least-as-likely-as-not standard when the evidence supports one.
Our evidence guide for knee claims covers what to gather before that opinion is written, and the knee C&P exam guide explains what happens at the examination itself.
Frequently asked questions
Is knee pain a VA disability?
Pain alone is not a disability for VA purposes unless it causes functional impairment. A diagnosed knee condition - osteoarthritis, a meniscal tear residual, ligament instability, patellofemoral syndrome - can be service connected when the evidence shows a current diagnosis, an in-service injury or cumulative exposure, and a medical link between them.
What is the average VA rating for knee pain?
There is no average. Knees are rated under 38 CFR 4.71a based on limited flexion, limited extension, instability, and ankylosis. Most ratings land between 10 and 30 percent, and painful motion alone carries a 10 percent minimum under 38 CFR 4.59.
Can both knees be rated separately?
Yes. Each knee is evaluated on its own under its own diagnostic codes, and the two evaluations are combined with everything else under the combined ratings table in 38 CFR 4.25.
Can I service connect a knee condition without in-service complaints?
Possibly. Cumulative load-bearing exposure, a disease diagnosed after discharge but shown to have begun in service under 38 CFR 3.303(d), arthritis manifesting within one year of separation, and secondary connection to an already service-connected back, hip, or mental health condition are all recognized pathways.