N21.1 – Calculus in urethra
ICD-10-CM 2027 diagnosis code · Urolithiasis
ICD-10-CM code
N21.1
- Code
N21.1(claims format:N211)- Description
- Calculus in urethra
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 14. Diseases of the genitourinary system (N00-N99)
- Block
- N20-N23 Urolithiasis
- Parent codes
- N21
Notes for N21.1
Excludes2 (not included here):
- calculus of prostate (N42.0)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
N21 – Calculus of lower urinary tract
Includes:
- calculus of lower urinary tract with cystitis and urethritis
Index terms for N21.1
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in N21
Frequently asked questions
What is ICD-10 code N21.1?
N21.1 is the ICD-10-CM code for calculus in urethra, in the block N20-N23 (Urolithiasis).
Is N21.1 a billable code?
Yes. N21.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does N21.1 belong to?
It belongs to category N21 – Calculus of lower urinary tract.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.