N20 ICD-10-CM Code: Calculus of kidney and ureter
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
N20Calculus of kidney and ureter
ICD-10-CM diagnosis code · United States clinical modification
Where N20 sits
- 1
Chapter 14
Diseases of the genitourinary system (N00-N99)
- 2
Section
Urolithiasis (N20-N23)
- 3
Category N20
Calculus of kidney and ureter
- 4
Code N20
Calculus of kidney and ureter
Codes under N20
N20 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
- Calculous pyelonephritis
Code first
No “code first” instruction is listed for N20.
Use additional code
No “use additional code” instruction is listed for N20.
Excludes1
Conditions that should not be reported together with this code.
- nephrocalcinosis (E83.59)
- that with hydronephrosis (N13.2)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for N20.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code N20 mean?
N20 is the FY 2027 U.S. ICD-10-CM code for “Calculus of kidney and ureter.”
Is N20 a billable or specific ICD-10-CM code?
No. N20 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is N20 located in ICD-10-CM?
N20 is listed in Chapter 14, Diseases of the genitourinary system (N00-N99), within Urolithiasis (N20-N23) (N20–N23), under category N20, Calculus of kidney and ureter.
What coding notes are listed for N20?
Its listed inclusion terms are Calculous pyelonephritis. No code-first instruction is listed. Excludes1 notes: nephrocalcinosis (E83.59); that with hydronephrosis (N13.2). No Excludes2 note is listed.