2020 ICD-10-CM Diagnosis Code N20.9

Urinary calculus, unspecified

    2016 2017 2018 2019 2020 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 2020 edition of ICD-10-CM N20.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of N20.9 - other international versions of ICD-10 N20.9 may differ.
The following code(s) above N20.9 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 N20.9:
  • 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
  • N20
    ICD-10-CM Diagnosis Code N20

    Calculus of kidney and ureter

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    • Calculous pyelonephritis
    Type 1 Excludes
    • nephrocalcinosis (E83.5)
    • that with hydronephrosis (N13.2)
    Calculus of kidney and ureter
Approximate Synonyms
  • Calcium oxalate urolithiasis
  • Calculus = cystine
  • Cystine calculus
  • Magnesium ammonium phosphate urolithiasis
  • Struvite calculus
  • Uric acid urolithiasis
  • Urinary tract calculus
  • Urolith
Clinical Information
  • 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.
ICD-10-CM N20.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 693 Urinary stones with mcc
  • 694 Urinary stones without mcc

Convert N20.9 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 N20.9:
  • Type 1 Excludes: N11.1
    , N12
    , N21.9
    ICD-10-CM Diagnosis Code N11.1

    Chronic obstructive pyelonephritis

      2016 2017 2018 2019 2020 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 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 Billable/Specific Code
    Type 1 Excludes
    • calculus of urinary tract NOS (N20.9)

Diagnosis Index entries containing back-references to N20.9:

ICD-10-CM Codes Adjacent To N20.9
N18.3 Chronic kidney disease, stage 3 (moderate)
N18.4 Chronic kidney disease, stage 4 (severe)
N18.5 Chronic kidney disease, stage 5
N18.6 End stage renal disease
N18.9 Chronic kidney disease, unspecified
N19 Unspecified kidney failure
N20 Calculus of kidney and ureter
N20.0 Calculus of kidney
N20.1 Calculus of ureter
N20.2 Calculus of kidney with calculus of ureter
N20.9 Urinary calculus, unspecified
N21 Calculus of lower urinary tract
N21.0 Calculus in bladder
N21.1 Calculus in urethra
N21.8 Other lower urinary tract calculus
N21.9 Calculus of lower urinary tract, unspecified
N22 Calculus of urinary tract in diseases classified elsewhere
N23 Unspecified renal colic
N25 Disorders resulting from impaired renal tubular function
N25.0 Renal osteodystrophy
N25.1 Nephrogenic diabetes insipidus

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