N25.8Other disorders resulting from impaired renal tubular function

N25.8 is the ICD-10-CM diagnosis code for other disorders resulting from impaired renal tubular function. It belongs to category N25 (disorders resulting from impaired renal tubular function), block N25-N29 (other disorders of kidney and ureter) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within N25, choose N25.8 (Other disorders resulting from impaired renal tubular function) only when documentation doesn't support a more specific option: renal osteodystrophy (N25.0), Nephrogenic diabetes insipidus (N25.1) and disorder resulting from impaired renal tubular function, unspecified (N25.9).

To report this condition, pick the subcode that matches the documentation: N25.81 (origin) and N25.89 (function).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.