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ICD-10-CM Codes
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N00-N99
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N20-N23
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N21-
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2023 ICD-10-CM Diagnosis Code N21
2023 ICD-10-CM Diagnosis Code N21
Calculus of lower urinary tract
2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
- N21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2023 edition of ICD-10-CM N21 became effective on October 1, 2022.
- This is the American ICD-10-CM version of N21 - other international versions of ICD-10 N21 may differ.
IncludesIncludes Help
"Includes" further defines, or give examples of, the content of the code or category.
- calculus of lower urinary tract with cystitis and urethritis
The following code(s) above
N21 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
N21:
- 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
ICD-10-CM Codes Adjacent To N21
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
N20.2 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
N25.8 Other disorders resulting from impaired renal tubular function
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
