2026 ICD-10-CM Diagnosis Code N33Bladder disorders in diseases classified elsewhere
ICD-10-CM Codes›N00–N99›N30-N39›N33
- Billable — Valid for Submission
- Not Chronic
N33 is a billable ICD-10-CM diagnosis code for bladder disorders 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 698 through 700. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as disorder of urinary bladder caused by Schistosoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified diseases of bladder and urethra.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for N33.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Disorder of urinary bladder caused by Schistosoma
- Disorder of urinary bladder caused by Schistosoma japonicum
- Schistosoma japonicum infection
- Urinary schistosomiasis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
Type 1 Excludes
- bladder disorder in syphilis A52.76
- bladder disorder in tuberculosis A18.12
- candidal cystitis B37.41
- chlamydial cystitis A56.01
- cystitis in gonorrhea A54.01
- cystitis in neurogenic bladder N31
- diphtheritic cystitis A36.85
- syphilitic cystitis A52.76
- trichomonal cystitis A59.03
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.
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.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Schistosoma Japonicum Infection
an infection that is caused by schistosoma japonicum.
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:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N33 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N33Overview
Is N33 (Bladder disorders in diseases classified elsewhere) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report bladder disorders in diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does N33 group to?
On inpatient claims, bladder disorders in diseases classified elsewhere maps to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N33 be a principal diagnosis?
No. This is a manifestation code: bladder disorders 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 N33?
Under the General Equivalence Mappings, bladder disorders in diseases classified elsewhere converts to ICD-9-CM 596.89 (disorders of bladder NEC). 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.
