Secondary Condition Claim · VASRD 7509
Hydronephrosis Secondary to Nephrolithiasis (kidney stones)
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 Hydronephrosis when it develops after Nephrolithiasis (kidney stones).
Primary condition · VASRD 7508
Nephrolithiasis (kidney stones)
Formation of stones in the kidney causing pain and urinary problems.
Secondary condition · VASRD 7509
Hydronephrosis
Swelling of the kidney due to urine backup from obstruction.
Hydronephrosis VA Rating Tiers
The VA rates Hydronephrosis the same way whether it's claimed directly or as secondary to Nephrolithiasis (kidney stones) — severity of Hydronephrosis itself determines the percentage.
Example combined rating
30% Nephrolithiasis (kidney stones) + 30% Hydronephrosis = 51%
The VA combines ratings with Table I of 38 CFR 4.25, not simple addition — 30% and 30% combine to 51%, not 60%. These figures are illustrative; your actual rating for each condition depends on your own evaluation.
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Evidence for a Hydronephrosis Secondary Claim
- •Ultrasound or CT imaging confirming the hydronephrosis and the obstruction behind it.
- •Records for each attack of colic, noting infection (pyonephrosis) and any catheter drainage.
- •Serial GFR or eGFR results with dates, since the severe branch is rated as renal dysfunction and each band requires at least 3 consecutive months during the past 12 months.
- •Urology or nephrology notes documenting kidney function alongside the obstruction.
Common questions about Hydronephrosis secondary to Nephrolithiasis (kidney stones)
- Can Hydronephrosis be service-connected as secondary to Nephrolithiasis (kidney stones)?
- 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. You'll need a current Hydronephrosis diagnosis and a medical nexus opinion linking it to your service-connected Nephrolithiasis (kidney stones) — the same standard…
- What VA rating can I get for Hydronephrosis as a secondary condition?
- Hydronephrosis is rated under VASRD diagnostic code 7509 using the same criteria whether it's a direct or secondary claim: possible ratings are 100%, 80%, 60%, 30%, 20%, 10%. The rating depends on the severity of Hydronephrosis itself, not on the severity of Nephrolithiasis (kidney stones).
- How does a secondary Hydronephrosis claim affect my combined VA rating?
- The VA doesn't add ratings together. Using the official combined-ratings formula (38 CFR 4.25): a 30% rating for Nephrolithiasis (kidney stones) combined with a 30% rating for Hydronephrosis (example figures) produces a combined rating of 51%, not 60%. Approving Hydronephrosis as secondary still typically raises your…
- What evidence do I need to service-connect Hydronephrosis as secondary to Nephrolithiasis (kidney stones)?
- Strong evidence for the underlying Hydronephrosis diagnosis includes: Ultrasound or CT imaging confirming the hydronephrosis and the obstruction behind it.; Records for each attack of colic, noting infection (pyonephrosis) and any catheter drainage.; Serial GFR or eGFR results with dates, since the severe branch is ra…
Primary condition
Full Nephrolithiasis (kidney stones) guide
Secondary condition
Full Hydronephrosis guide
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See how Nephrolithiasis (kidney stones) and Hydronephrosis combine with the rest of your service-connected conditions using the official VA combined-ratings formula.
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