2021 ICD-10-CM Diagnosis Code N00

Acute nephritic syndrome

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • N00 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM N00 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of N00 - other international versions of ICD-10 N00 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as N00. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • acute tubulo-interstitial nephritis (
    ICD-10-CM Diagnosis Code N10

    Acute pyelonephritis

      2016 2017 - Revised Code 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Acute infectious interstitial nephritis
    • Acute pyelitis
    • Acute tubulo-interstitial nephritis
    • Hemoglobin nephrosis
    • Myoglobin nephrosis
    Use Additional
    • code (B95-B97), to identify infectious agent.
  • nephritic syndrome NOS (
    ICD-10-CM Diagnosis Code N05
    • N05 Unspecified nephritic syndrome
      • N05.0 Unspecified nephritic syndrome with minor glo...
      • N05.1 Unspecified nephritic syndrome with focal and...
      • N05.2 Unspecified nephritic syndrome with diffuse m...
      • N05.3 Unspecified nephritic syndrome with diffuse m...
      • N05.4 Unspecified nephritic syndrome with diffuse e...
      • N05.5 Unspecified nephritic syndrome with diffuse m...
      • N05.6 Unspecified nephritic syndrome with dense dep...
      • N05.7 Unspecified nephritic syndrome with diffuse c...
      • N05.8 Unspecified nephritic syndrome with other mor...
      • N05.9 Unspecified nephritic syndrome with unspecifi...
      • N05.A Unspecified nephritic syndrome with C3 glomer...
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • acute glomerular disease
  • acute glomerulonephritis
  • acute nephritis
The following code(s) above N00 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to N00:
  • N00-N99
    2021 ICD-10-CM Range N00-N99

    Diseases of the genitourinary system

    Type 2 Excludes
    • 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)
    Diseases of the genitourinary system
  • N00-N08
    2021 ICD-10-CM Range N00-N08

    Glomerular diseases

    Code Also
    • any associated kidney failure (N17-N19).
    Type 1 Excludes
    • hypertensive chronic kidney disease (I12.-)
    Glomerular diseases
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To N00
M99.81 …… of cervical region
M99.82 …… of thoracic region
M99.83 …… of lumbar region
M99.84 …… of sacral region
M99.85 …… of pelvic region
M99.86 …… of lower extremity
M99.87 …… of upper extremity
M99.88 …… of rib cage
M99.89 …… of abdomen and other regions
M99.9 Biomechanical lesion, unspecified
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

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.