N33 – Bladder disorders in diseases classified elsewhere

ICD-10-CM 2027 diagnosis code · Other diseases of the urinary system

Billable code

ICD-10-CM code N33

Code: N33 (claims format: N33)
Description: Bladder disorders in diseases classified elsewhere
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 14. Diseases of the genitourinary system (N00-N99)
Block: N30-N39 Other diseases of the urinary system

Notes for N33

Excludes1 (not coded here):

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)

Code first:

underlying disease, such as:
schistosomiasis (B65.0-B65.9)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block N30-N39

Excludes2 (not included here):

urinary infection (complicating):
abortion or ectopic or molar pregnancy (O00-O07, O08.8)
pregnancy, childbirth and the puerperium (O23.-, O75.3, O86.2-)

Index terms for N33

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code N33?

N33 is the ICD-10-CM code for bladder disorders in diseases classified elsewhere, in the block N30-N39 (Other diseases of the urinary system).

Is N33 a billable code?

Yes. N33 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.