Secondary Condition Claim · VASRD 5257
Knee, Other Impairment of Secondary to Loss of Use of One Foot
A condition caused or aggravated by an already service-connected disability can be granted its own service connection as a secondary condition under 38 CFR § 3.310. Here's how that works for Knee, Other Impairment of when it develops after Loss of Use of One Foot.
Why Knee, Other Impairment of Is Linked to Loss of Use of One Foot
Compensatory walking can cause joint strain
Primary condition · VASRD 5044
Loss of Use of One Foot
This code applies when a foot is still physically present but no longer functions well enough for effective walking or balance, essentially treating the functional loss the same as if the foot had been amputated. It's a strict, single-tier standard - the foot has to be functionally unusable, not just painful or weak.
Secondary condition · VASRD 5257
Knee, Other Impairment of
This diagnostic code covers knee instability - the knee buckling, giving out, or feeling loose during activity - separate from simple pain or arthritis. It's rated on how often and how severely the knee subluxates (partially dislocates) or shifts out of place, which is a different rating track than knee pain alone.
Knee, Other Impairment of VA Rating Tiers
The VA rates Knee, Other Impairment of the same way whether it's claimed directly or as secondary to Loss of Use of One Foot — severity of Knee, Other Impairment of itself determines the percentage.
Example combined rating
40% Loss of Use of One Foot + 20% Knee, Other Impairment of = 52%
The VA combines ratings with Table I of 38 CFR 4.25, not simple addition — 40% and 20% combine to 52%, not 60%. These figures are illustrative; your actual rating for each condition depends on your own evaluation.
Evidence for a Knee, Other Impairment of Secondary Claim
- •An orthopedic evaluation that specifically documents instability findings (not just 'knee pain'), including the results of stability testing.
- •Records of falls, giving-out episodes, or ER visits tied to the knee - real-world evidence of instability carries significant weight.
- •MRI or arthroscopy reports showing ligament or meniscus damage consistent with an unstable joint.
Common questions about Knee, Other Impairment of secondary to Loss of Use of One Foot
- Can Knee, Other Impairment of be service-connected as secondary to Loss of Use of One Foot?
- Yes. Under 38 CFR § 3.310, a condition that is caused or aggravated by an already service-connected disability can be granted secondary service connection. Compensatory walking can cause joint strain You'll need a current Knee, Other Impairment of diagnosis and a medical nexus opinion linking it to your service-connec…
- What VA rating can I get for Knee, Other Impairment of as a secondary condition?
- Knee, Other Impairment of is rated under VASRD diagnostic code 5257 using the same criteria whether it's a direct or secondary claim: possible ratings are 30%, 20%, 10%. The rating depends on the severity of Knee, Other Impairment of itself, not on the severity of Loss of Use of One Foot.
- How does a secondary Knee, Other Impairment of claim affect my combined VA rating?
- The VA doesn't add ratings together. Using the official combined-ratings formula (38 CFR 4.25): a 40% rating for Loss of Use of One Foot combined with a 20% rating for Knee, Other Impairment of (example figures) produces a combined rating of 52%, not 60%. Approving Knee, Other Impairment of as secondary still typicall…
- What evidence do I need to service-connect Knee, Other Impairment of as secondary to Loss of Use of One Foot?
- Strong evidence for the underlying Knee, Other Impairment of diagnosis includes: An orthopedic evaluation that specifically documents instability findings (not just 'knee pain'), including the results of stability testing.; Records of falls, giving-out episodes, or ER visits tied to the knee - real-world evidence of i…
Primary condition
Full Loss of Use of One Foot guide
Secondary condition
Full Knee, Other Impairment of guide
Estimate your combined rating
See how Loss of Use of One Foot and Knee, Other Impairment of combine with the rest of your service-connected conditions using the official VA combined-ratings formula.
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