Osteoarthritis is the most common knee diagnosis among older veterans, and it is usually the endpoint of the claim - the cumulative result of ruck marches, jumps, athletic injuries, and a career of load bearing. Service connecting it is a different exercise from rating it, and veterans do best when they understand both.
Rated on motion, not on the X-ray
Diagnostic Code 5003 establishes degenerative arthritis as a ratable condition, but the schedule does not assign percentages to cartilage loss or joint-space narrowing. Those findings diagnose the condition; the rating comes from what the arthritis has taken away - flexion, extension, painful motion, and instability under the knee criteria in 38 CFR 4.71a.
This is why two veterans with similar-looking films can receive different ratings, and why the functional-loss rules matter as much as the diagnosis.
The one-year presumption
Degenerative arthritis is one of the chronic diseases listed in 38 CFR 3.309(a). Under 38 CFR 3.307, when it manifests to a compensable degree within one year of separation, it is presumptively service connected - no nexus opinion required. Records from that first post-service year are disproportionately valuable and are the records veterans most often have not requested.
Post-traumatic arthritis
When a documented in-service knee injury - a meniscal tear, a ligament rupture, a direct blow - is followed years later by degenerative change in the same compartment, the theory is direct service connection: the trauma initiated the degeneration, and a medical opinion links the two. The opinion should address the interval between injury and arthritis, since the VA will point to it; orthopedic literature supports trauma-to-degeneration sequences measured in years, not months.
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.
Progression and increased ratings
Arthritis progresses, and ratings can follow. Re-examinations re-measure flexion, extension, and instability; between exams, treatment records documenting worsening - steroid injections, bracing, surgical consultations - build the case for an increased evaluation. Documented flare-ups and functional decline matter at each review.
Knee replacement - Diagnostic Code 5055
Total knee replacement carries its own rule: 100 percent for the year following implantation, then re-evaluation on residuals with a minimum of 30 percent. The residuals evaluation again follows motion and painful motion criteria, so the first post-operative C&P exam deserves the same preparation as any other.
Arthritis plus everything else
An arthritic knee is rarely just arthritic - meniscal residuals, ligament laxity, and effusion often travel with it, and each feeds the flexion, extension, and instability criteria. Our knee ratings guide shows how the separate criteria combine.
Frequently asked questions
What VA rating does osteoarthritis of the knee get?
Osteoarthritis is diagnosed under Diagnostic Code 5003 but rated on its functional effect: limited flexion and extension under 38 CFR 4.71a, plus a 10 percent minimum for painful motion under 38 CFR 4.59. Imaging establishes the diagnosis; the motion findings set the percentage.
Can arthritis be service connected years after service?
Yes. Degenerative arthritis is a chronic disease listed in 38 CFR 3.309(a), presumptively service connected when it manifests to a compensable degree within one year of separation under 38 CFR 3.307. Post-traumatic arthritis can also be connected directly to an in-service injury through a medical opinion.
Does a normal X-ray defeat a knee claim?
Not necessarily, but it complicates it. The rating follows motion and function, though a claim still needs a diagnosis. Soft-tissue and early degenerative findings on MRI, plus documented functional loss, can carry a claim when standing X-rays are unrevealing.
What rating applies after knee replacement surgery?
Under Diagnostic Code 5055, a total knee replacement is rated 100 percent for one year following implantation, then re-evaluated on residuals with a minimum evaluation of 30 percent.