Chapter 14

N00–N99: Diseases of the Genitourinary System

Diseases of the Genitourinary System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
All CodesBillable Only
Internal Codes
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  • N03.2—

    Chronic nephritic syndrome with diffuse membranous glomerulonephritis

  • N03.3—

    Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis

  • N03.4—

    Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis

  • N03.5—

    Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis

  • N03.6—

    Chronic nephritic syndrome with dense deposit disease

  • N03.7—

    Chronic nephritic syndrome with diffuse crescentic glomerulonephritis

  • N03.8—

    Chronic nephritic syndrome with other morphologic changes

  • N03.9—

    Chronic nephritic syndrome with unspecified morphologic changes

  • N03.A—

    Chronic nephritic syndrome with C3 glomerulonephritis

  • N04—

    Nephrotic syndrome

  • N04.0—

    Nephrotic syndrome with minor glomerular abnormality

  • N04.1—

    Nephrotic syndrome with focal and segmental glomerular lesions

  • N04.2—

    Nephrotic syndrome with diffuse membranous glomerulonephritis

  • N04.20—

    Nephrotic syndrome with diffuse membranous glomerulonephritis, unspecified

  • N04.21—

    Primary membranous nephropathy with nephrotic syndrome

  • N04.22—

    Secondary membranous nephropathy with nephrotic syndrome

  • N04.29—

    Other nephrotic syndrome with diffuse membranous glomerulonephritis

  • N04.3—

    Nephrotic syndrome with diffuse mesangial proliferative glomerulonephritis

  • N04.4—

    Nephrotic syndrome with diffuse endocapillary proliferative glomerulonephritis

  • N04.5—

    Nephrotic syndrome with diffuse mesangiocapillary glomerulonephritis

  • N04.6—

    Nephrotic syndrome with dense deposit disease

  • N04.7—

    Nephrotic syndrome with diffuse crescentic glomerulonephritis

  • N04.8—

    Nephrotic syndrome with other morphologic changes

  • N04.9—

    Nephrotic syndrome with unspecified morphologic changes

  • N04.A—

    Nephrotic syndrome with C3 glomerulonephritis

  • N04.B—

    Nephrotic syndrome with immune complex membranoproliferative glomerulonephritis (IC-MPGN)

  • N04.B1—

    Nephrotic syndrome with idiopathic immune complex membranoproliferative glomerulonephritis (IC-MPGN)

  • N04.B2—

    Nephrotic syndrome with secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN)

  • N05—

    Unspecified nephritic syndrome

  • N05.0—

    Unspecified nephritic syndrome with minor glomerular abnormality

  • N05.1—

    Unspecified nephritic syndrome with focal and segmental glomerular lesions

  • N05.2—

    Unspecified nephritic syndrome with diffuse membranous glomerulonephritis

  • N05.3—

    Unspecified nephritic syndrome with diffuse mesangial proliferative glomerulonephritis

  • N05.4—

    Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis

  • N05.5—

    Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritis

  • N05.6—

    Unspecified nephritic syndrome with dense deposit disease

  • N05.7—

    Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis

  • N05.8—

    Unspecified nephritic syndrome with other morphologic changes

  • N05.9—

    Unspecified nephritic syndrome with unspecified morphologic changes

  • N05.A—

    Unspecified nephritic syndrome with C3 glomerulonephritis

  • N06—

    Isolated proteinuria with specified morphological lesion

  • N06.0—

    Isolated proteinuria with minor glomerular abnormality

  • N06.1—

    Isolated proteinuria with focal and segmental glomerular lesions

  • N06.2—

    Isolated proteinuria with diffuse membranous glomerulonephritis

  • N06.20—

    Isolated proteinuria with diffuse membranous glomerulonephritis, unspecified

  • N06.21—

    Primary membranous nephropathy with isolated proteinuria

  • N06.22—

    Secondary membranous nephropathy with isolated proteinuria

  • N06.29—

    Other isolated proteinuria with diffuse membranous glomerulonephritis

  • N06.3—

    Isolated proteinuria with diffuse mesangial proliferative glomerulonephritis

  • N06.4—

    Isolated proteinuria with diffuse endocapillary proliferative glomerulonephritis

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