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7507
§ 4.115b Ratings of the genitourinary system—diagnoses.

Kidney hardening

Hardening of the kidney due to infiltration by fibrous connective tissue (fibrosis), usually caused by renovascular diseases or chronic hypertension. Nephrosclerosis leads to renal ischemia.

What the rating means

Nephrosclerosis, arteriolar (diagnostic code 7507) is not rated by a single fixed formula. Instead, VA rates it based on whichever set of symptoms is most prominent — renal dysfunction, hypertension, or heart disease. If renal dysfunction is predominant, VA applies the renal dysfunction ratings under § 4.115a, which range from 0% to 100% depending on your glomerular filtration rate (GFR) and related findings over a 12-month period. If hypertension or heart disease is predominant, VA rates the condition under the cardiovascular schedule. There is one important difference when the cardiovascular schedule applies: the percentage rating that would otherwise be assigned is elevated to the next higher evaluation. Only the predominant area of dysfunction is considered, unless distinct disabilities with non-overlapping symptoms exist, in which case they may be evaluated separately.

Evidence that helps

Because rating depends on which symptoms predominate, the most useful evidence is whatever documents those predominant symptoms clearly. For renal dysfunction, VA looks for lab results showing GFR measurements — or estimated GFR or creatinine-based approximations calculated by a medical professional — recorded over at least three consecutive months within the past 12 months. Records showing urine test results with RBC casts, WBC casts, or granular casts, albumin-to-creatinine ratio results, dialysis records, or documentation of kidney transplant eligibility all directly support specific rating levels. For hypertension or heart disease as the predominant symptom, cardiovascular exam findings and treatment records are key. Statements from you or people who know you describing how symptoms affect your daily activities and work can help show which condition is predominant and how severely it affects your functioning.

Secondary conditions

Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.