N00Acute nephritic syndrome

N00 is the ICD-10-CM diagnosis code for acute nephritic syndrome. It belongs to block N00-N08 (glomerular diseases) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 12 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: N00.0 (with minor glomerular abnormality), N00.1 (with focal and segmental glomerular lesions), N00.2 (with diffuse membranous glomerulonephritis), N00.3 (with diffuse mesangial proliferative glomerulonephritis), N00.4 (with diffuse endocapillary proliferative glomerulonephritis), N00.5 (with diffuse mesangiocapillary glomerulonephritis), N00.6 (with dense deposit disease), N00.7 (with diffuse crescentic glomerulonephritis) and 4 more.

Don't report N00 together with the conditions in its Excludes1 note: acute tubulo-interstitial nephritis (N10) and nephritic syndrome NOS (N05.-).

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