2020 ICD-10-CM Diagnosis Code N28.81

Hypertrophy of kidney

    2016 2017 2018 2019 2020 Billable/Specific Code
  • N28.81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM N28.81 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of N28.81 - other international versions of ICD-10 N28.81 may differ.
The following code(s) above N28.81 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 N28.81:
  • N00-N99
    2020 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
  • N25-N29
    2020 ICD-10-CM Range N25-N29

    Other disorders of kidney and ureter

    Type 2 Excludes
    • disorders of kidney and ureter with urolithiasis (N20-N23)
    Other disorders of kidney and ureter
  • N28.8
    ICD-10-CM Diagnosis Code N28.8

    Other specified disorders of kidney and ureter

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • hydroureter (N13.4)
    • ureteric stricture with hydronephrosis (N13.1)
    • ureteric stricture without hydronephrosis (N13.5)
    Other specified disorders of kidney and ureter
Clinical Information
  • General increase in bulk of the kidney due to an increase in cell volume; it is not due to tumor formation, nor to an increase in the number of cells.
ICD-10-CM N28.81 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 698 Other kidney and urinary tract diagnoses with mcc
  • 699 Other kidney and urinary tract diagnoses with cc
  • 700 Other kidney and urinary tract diagnoses without cc/mcc

Convert N28.81 to ICD-9-CM

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
Code annotations containing back-references to N28.81:
  • Type 2 Excludes: R93.4
    ICD-10-CM Diagnosis Code R93.4

    Abnormal findings on diagnostic imaging of urinary organs

      2016 2017 - Converted to Parent Code 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • hypertrophy of kidney (N28.81)

Diagnosis Index entries containing back-references to N28.81:

ICD-10-CM Codes Adjacent To N28.81
N26.2 Page kidney
N26.9 Renal sclerosis, unspecified
N27 Small kidney of unknown cause
N27.0 Small kidney, unilateral
N27.1 Small kidney, bilateral
N27.9 Small kidney, unspecified
N28 Other disorders of kidney and ureter, not elsewhere classified
N28.0 Ischemia and infarction of kidney
N28.1 Cyst of kidney, acquired
N28.8 Other specified disorders of kidney and ureter
N28.81 Hypertrophy of kidney
N28.82 Megaloureter
N28.83 Nephroptosis
N28.84 Pyelitis cystica
N28.85 Pyeloureteritis cystica
N28.86 Ureteritis cystica
N28.89 Other specified disorders of kidney and ureter
N28.9 Disorder of kidney and ureter, unspecified
N29 Other disorders of kidney and ureter in diseases classified elsewhere
N30 Cystitis
N30.0 Acute cystitis

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