ICD-10-CM Codes
N00-N99
N20-N23
N21-
2023 ICD-10-CM Diagnosis Code N21.8

2023 ICD-10-CM Diagnosis Code N21.8

Other lower urinary tract calculus

2016

2017

2018

2019

2020

2021

2022

2023

Billable/Specific Code

N21.8 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 N21.8 became effective on October 1, 2022.
This is the American ICD-10-CM version of N21.8 - other international versions of ICD-10 N21.8 may differ.

The following code(s) above N21.8 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 N21.8:

N00-N99
2023 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
N21
ICD-10-CM Diagnosis Code N21
Calculus of lower urinary tract
Includes
- calculus of lower urinary tract with cystitis and urethritis
Calculus of lower urinary tract

ICD-10-CM N21.8 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):

693 Urinary stones with mcc
694 Urinary stones without mcc

Convert N21.8 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
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to N21.8:

Calculus, calculi, calculous
- urinary (duct) (impacted) (passage) (tract) N20.9
  ICD-10-CM Diagnosis Code N20.9
  Urinary calculus, unspecified
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  - lower N21.9
    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)
    - specified NEC N21.8
- ileal conduit N21.8
- suburethral N21.8
Stone(s) - see also Calculus
- urinary (duct) (impacted) (passage) N20.9
  ICD-10-CM Diagnosis Code N20.9
  Urinary calculus, unspecified
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  - specified NEC N21.8

ICD-10-CM Codes Adjacent To N21.8

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

N25.8 Other disorders resulting from impaired renal tubular function

N25.81 Secondary hyperparathyroidism of renal origin

N25.89 Other disorders resulting from impaired renal tubular function

N25.9 Disorder resulting from impaired renal tubular function, unspecified

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

2023 ICD-10-CM Diagnosis Code N21.8

Other lower urinary tract calculus

Diseases of the genitourinary system

Calculus of lower urinary tract

Urinary calculus, unspecified

Calculus of lower urinary tract, unspecified

Urinary calculus, unspecified