2026 ICD-10-CM Diagnosis Code N20Calculus of kidney and ureter
N20 is a non-billable ICD-10-CM category code for calculus of kidney and ureter, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N20.0, N20.1, N20.2, and N20.9.
Code Identity
Code Classification
Specific Coding for Calculus of kidney and ureterOverview
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Calculous pyelonephritis
Type 1 Excludes
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Patient EducationClinical
Kidney Stones
A kidney stone is a solid piece of material that forms in the kidney from substances in the urine. It may be as small as a grain of sand or as large as a pearl. Most kidney stones pass out of the body without help from a doctor. But sometimes a stone will not go away.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About N20Overview
Is N20 (Calculus of kidney and ureter) a billable code?
No. This is a category header that groups the codes for calculus of kidney and ureter, and headers cannot be submitted on claims. Claims for calculus of kidney and ureter need a more specific code from this category, such as N20.0, N20.1, and N20.2.
