肾病（英语：Nephrosis），肾病变的一种，指非发炎性的肾病变。出现肾病症候群是其特征，任何出现在肾小管的退化性疾病，都可以称为肾病。它可能是直接由肾脏病变造成，也可能是其他疾病或身体机能失调引起。

Nephrosis refers to a non-inflammatory nephropathy. Also known as nephrotic syndrome, nephrosis is any degenerative disease of the renal tubules. Nephrosis can be caused by kidney disease, or it may be secondary to another disorder.

It should not be confused with nephritis, where inflammation is implied. However, some sources equate nephrosis with nephropathy.