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2. ICD-10 Codes
3. Chapter - N00-N99
4. Section - N20-N23
5. Category - N21
6. N21.9

N21.9 - Calculus of lower urinary tract, unspecified

• Applicable to Calculus of lower urinary tract, unspecified
• The 2025 edition of ICD10-CM N21.9 became effective on October 1, 2024.
• This is the American ICD10-CM version of N21.9 - other international versions of ICD10 N21.9 may differ.
• N21.9 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Type 1 Excludes

• calculus of urinary tract NOS (N20.9)

The following codes above N21.9 contain annotation back-references that may be applicable to N21.9:

• Chapter: N00-N99 - Diseases of the genitourinary system
• Section: N20-N23 - Urolithiasis
• Category: N21 - Calculus of lower urinary tract

Browse other similar CM codes:

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