The knee can be rated on three separate codes: Flexion (bending), Extension (straightening), and Instability (giving out). This is often called the "Knee Pain Triad."
Many veterans are rated for just one aspect (painful motion - 10%). By properly documenting the ROM and instability with a private doctor, you can potentially get rated for all three aspects on a single knee.
Check Your Knees
Are you underrated for joint pain? Let's review your file.