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  3. N00–N99
  4. N00-N08
  5. Acute nephritic syndrome (N00)

Acute nephritic syndrome (N00)

ICD-10 code N00 covers acute nephritic syndrome, a condition characterized by sudden inflammation of the kidneys' filtering units. This section includes specific subcodes that identify various types and underlying patterns of kidney injury seen in acute nephritic syndrome.

The range of codes from N00.0 to N00.A specifies distinctive forms of this syndrome based on microscopic changes in the glomeruli, such as minor abnormalities (acute nephritic syndrome, minor glomerular abnormality - N00.0), focal and segmental lesions (N00.1), and different proliferative or membranous conditions, including diffuse membranous (N00.2) and mesangial proliferative glomerulonephritis (N00.3). Other codes represent rare variants like dense deposit disease (N00.6) and crescentic glomerulonephritis (N00.7), also known as idiopathic crescentic glomerulonephritis. The ICD-10 code for acute nephritic syndrome with unspecified changes (N00.9) captures cases where the precise morphological diagnosis isn’t clear, including common terms like post-infectious glomerulonephritis or acute post-streptococcal glomerulonephritis. Understanding these codes helps clinicians and coders accurately classify the specific kidney pathology for treatment and billing purposes.

  • Diseases of the genitourinary system (N00–N99)

    • Glomerular diseases (N00-N08)

        • Acute nephritic syndrome (N00)

        • N00 Acute nephritic syndrome
        • N00.0 Acute nephritic syndrome with minor glomerular abnormality
        • N00.1 Acute nephritic syndrome with focal and segmental glomerular lesions
        • N00.2 Acute nephritic syndrome with diffuse membranous glomerulonephritis
        • N00.3 Acute nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
        • N00.4 Acute nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
        • N00.5 Acute nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
        • N00.6 Acute nephritic syndrome with dense deposit disease
        • N00.7 Acute nephritic syndrome with diffuse crescentic glomerulonephritis
        • N00.8 Acute nephritic syndrome with other morphologic changes
        • N00.9 Acute nephritic syndrome with unspecified morphologic changes
        • N00.A Acute nephritic syndrome with C3 glomerulonephritis

Instructional Notations

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

  • acute glomerular disease
  • acute glomerulonephritis
  • acute nephritis

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • acute tubulo-interstitial nephritis N10
  • nephritic syndrome NOS N05