2024 ICD-10-CM Diagnosis Code N21.0

Calculus in bladder

ICD-10-CM:
N21.0
Short Description:
Calculus in bladder
Is Billable?
Yes - Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the genitourinary system
    (N00–N99)
    • Urolithiasis
      (N20-N23)
      • Calculus of lower urinary tract
        (N21)

N21.0 is a billable diagnosis code used to specify a medical diagnosis of calculus in bladder. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Calcium oxalate calculus of bladder
  • Calcium oxalate urolithiasis
  • Calculus in diverticulum of bladder
  • Calculus of lower urinary tract
  • Calculus of lower urinary tract
  • Calculus of lower urinary tract
  • Calculus of lower urinary tract
  • Calculus of lower urinary tract
  • Calculus of lower urinary tract
  • Calculus of lower urinary tract
  • Calculus of lower urinary tract
  • Oxalate bladder stone
  • Phosphate bladder stone
  • Phosphate calculus of bladder
  • Small calculus particles in urinary bladder
  • Uric acid bladder stone
  • Urinary bladder stone

Clinical Information

  • Calcium Oxalate Urolithiasis-. urolithiasis in which the composition of the stones is predominantly calcium oxalate.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert to ICD-9-CM Code

Source ICD-10-CM CodeTarget ICD-9-CM Code
N21.0594.0 - Blad diverticulum calcul
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.
N21.0594.1 - Bladder calculus NEC
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


Bladder Diseases

The bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are:

  • Cystitis - inflammation of the bladder, often from an infection
  • Urinary incontinence - loss of bladder control
  • Overactive bladder - a condition in which the bladder squeezes urine out at the wrong time
  • Interstitial cystitis - a chronic problem that causes bladder pain and frequent, urgent urination
  • Bladder cancer

Doctors diagnose bladder diseases using different tests. These include urine tests, x-rays, and an examination of the bladder wall with a scope called a cystoscope. Treatment depends on the cause of the problem. It may include medicines and, in severe cases, surgery.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


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Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.