Use additional code, if desired, to identify external cause (Chapter XX) or presence of renal failure (N17-N19).
Excludes: hypertensive renal disease (I12.-)
The following fourth-character subdivisions classify morphological changes and are for use with categories N00-N07. Subdivisions .0-.8 should not normally be used unless these have been specifically identified (e.g. by renal biopsy or autopsy). The three-character categories relate to clinical syndromes.
.0 Minor glomerular abnormality
Minimal change lesion
.1 Focal and segmental glomerular lesions
Focal and segmental:
. hyalinosis
. sclerosis
Focal glomerulonephritis
.2 Diffuse membranous glomerulonephritis
.3 Diffuse mesangial proliferative glomerulonephritis
.4 Diffuse endocapillary proliferative glomerulonephritis
.5 Diffuse mesangiocapillary glomerulonephritis
Membranoproliferative glomerulonephritis, types 1 and 3, or NOS
.6 Dense deposit disease
Membranoproliferative glomerulonephritis, type 2
.7 Diffuse crescentic glomerulonephritis
Extracapillary glomerulonephritis
.8 Other
Proliferative glomerulonephritis NOS
.9 Unspecified