1. ICD-10-CM Codes
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2. N00-N99 Diseases of the genitourinary system
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3. N25-N29 Other disorders of kidney and ureter
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4. N28- Other disorders of kidney and ureter, not elsewhere classified
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5. 2021 ICD-10-CM Diagnosis Code N28.81

2021 ICD-10-CM Diagnosis Code N28.81

Hypertrophy of kidney

2016 2017 2018 2019 2020 2021 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 2021 edition of ICD-10-CM N28.81 became effective on October 1, 2020.
• This is the American ICD-10-CM version of N28.81 - other international versions of ICD-10 N28.81 may differ.

• 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.

• 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

• 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

• 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 2021 Non-Billable/Non-Specific Code

  Type 2 Excludes

  • hypertrophy of kidney (N28.81)

• Hypertrophy, hypertrophic
  • kidney (compensatory) N28.81

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