1. ICD-10-CM Codes
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2. N00-N99
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3. N20-N23
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4. N20-
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5. 2023 ICD-10-CM Diagnosis Code N20.9

2023 ICD-10-CM Diagnosis Code N20.9

Urinary calculus, unspecified

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• N20.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM N20.9 became effective on October 1, 2022.
• This is the American ICD-10-CM version of N20.9 - other international versions of ICD-10 N20.9 may differ.

• Calcium oxalate urolithiasis
• Calculus = cystine
• Cystine calculus
• Magnesium ammonium phosphate urolithiasis
• Struvite calculus
• Uric acid urolithiasis
• Urinary tract calculus
• Urolith

• Abnormal concretions occuring within the urinary tract, usually composed of mineral salts.
• Low-density crystals or stones in any part of the urinary tract. Their chemical compositions often include calcium oxalate, magnesium ammonium phosphate (struvite), cystine, or uric acid.

• 693 Urinary stones with mcc
• 694 Urinary stones without mcc

Convert N20.9 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
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change

• Type 1 Excludes: N11.1
  , N12
  , N21.9
  ICD-10-CM Diagnosis Code N11.1

  Chronic obstructive pyelonephritis

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Pyelonephritis (chronic) associated with anomaly of pelviureteric junction
  • Pyelonephritis (chronic) associated with anomaly of pyeloureteric junction
  • Pyelonephritis (chronic) associated with crossing of vessel
  • Pyelonephritis (chronic) associated with kinking of ureter
  • Pyelonephritis (chronic) associated with obstruction of ureter
  • Pyelonephritis (chronic) associated with stricture of pelviureteric junction
  • Pyelonephritis (chronic) associated with stricture of ureter

  Type 1 Excludes

  • calculous pyelonephritis (N20.9)
  • obstructive uropathy (N13.-)
  ICD-10-CM Diagnosis Code N12

  Tubulo-interstitial nephritis, not specified as acute or chronic

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Interstitial nephritis NOS
  • Pyelitis NOS
  • Pyelonephritis NOS

  Type 1 Excludes

  • calculous pyelonephritis (N20.9)
  ICD-10-CM Diagnosis Code N21.9

  Calculus of lower urinary tract, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Type 1 Excludes

  • calculus of urinary tract NOS (N20.9)

• Anuria R34
  ICD-10-CM Diagnosis Code R34

  Anuria and oliguria

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Type 1 Excludes

  • anuria and oliguria complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4)
  • anuria and oliguria complicating pregnancy (O26.83-)
  • anuria and oliguria complicating the puerperium (O90.4)
  • calculous N20.9 (impacted) (recurrent) - see also Calculus, urinary
• Calculus, calculi, calculous
  • urinary (duct) (impacted) (passage) (tract) N20.9
  • anuria N20.9 (impacted) (recurrent) - see also Calculus, urinary
• Stone(s) - see also Calculus
  • urinary (duct) (impacted) (passage) N20.9

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