2026 ICD-10-CM Diagnosis Code N22Calculus of urinary tract in diseases classified elsewhere
ICD-10-CM Codes›N00–N99›N20-N23›N22
- Billable — Valid for Submission
- Not Chronic
N22 is a billable ICD-10-CM diagnosis code for calculus of urinary tract in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 693 through 694. The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Calculus of urinary tract.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for N22.
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Bladder Diseases
The bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are:
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Convert N22 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N22Overview
Is N22 (Calculus of urinary tract in diseases classified elsewhere) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report calculus of urinary tract in diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does N22 group to?
On inpatient claims, calculus of urinary tract in diseases classified elsewhere maps to MS-DRG 693, 694, with relative weights from 0.7817 to 1.3445 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N22 be a principal diagnosis?
No. This is a manifestation code: calculus of urinary tract in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of N22?
Under the General Equivalence Mappings, calculus of urinary tract in diseases classified elsewhere converts to ICD-9-CM 592.9 (urinary calculus NOS). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
