ICD-10-CM Codes
N00-N99
N20-N23
N21-
2023 ICD-10-CM Diagnosis Code N21.1

2023 ICD-10-CM Diagnosis Code N21.1

Calculus in urethra

2016

2017

2018

2019

2020

2021

2022

2023

Billable/Specific Code

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

Type 2 Excludes

Type 2 Excludes Help

A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (N21.1) and the excluded code together.

calculus of prostate (
ICD-10-CM Diagnosis Code N42.0
Calculus of prostate
Applicable To
- Prostatic stone
N42.0
)

The following code(s) above N21.1 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 N21.1:

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

Approximate Synonyms

Calculus, urethra

ICD-10-CM N21.1 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):

693 Urinary stones with mcc
694 Urinary stones without mcc

Convert N21.1 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 N21.1:

Calculus, calculi, calculous
- urethra N21.1 (impacted)
Colic (bilious) (infantile) (intestinal) (recurrent) (spasmodic) R10.83
ICD-10-CM Diagnosis Code R10.83
Colic
Applicable To
Colic NOS
Infantile colic
Type 1 Excludes
colic in adult and child over 12 months old (R10.84)
- urethral N36.8
  ICD-10-CM Diagnosis Code N36.8
  Other specified disorders of urethra
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  Type 1 Excludes
  congenital urethrocele (Q64.7)
  female urethrocele (N81.0)
  - due to calculus N21.1
Stone(s) - see also Calculus
- urethra N21.1 (impacted)
Urethritis (anterior) (posterior) N34.2
ICD-10-CM Diagnosis Code N34.2
Other urethritis
Applicable To
Meatitis, urethral
Postmenopausal urethritis
Ulcer of urethra (meatus)
Urethritis NOS
- calculous N21.1
Urethrolithiasis N21.1 (with colic or infection)

ICD-10-CM Codes Adjacent To N21.1

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

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

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 N21.1

Calculus in urethra

Calculus of prostate

Diseases of the genitourinary system

Calculus of lower urinary tract

Colic

Other specified disorders of urethra

Other urethritis