Alphabetic Index FY2027

N33

Bladder disorders in diseases classified elsewhere

FY2027Chapter 14: Diseases of the genitourinary system/N30–N39 Other diseases of the urinary system

BillableComplete code, valid to report
Care settingsHospice: not accepted as primary

N33 is a billable ICD-10-CM diagnosis code for bladder disorders in diseases classified elsewhere. It is part of the FY2027 code set, effective October 1, 2026. The Alphabetic Index lists it under 5 entries. Its coding notes include a Code first instruction, 9 Excludes1 entries and 11 Excludes2 entries.

Code first

If the underlying condition listed here is present and known, sequence it first.

This code
  • underlying disease, such as:

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • 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)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (11 notes)
Inherited from N30–N39 Other diseases of the urinary system
  • urinary infection (complicating):
    • abortion or ectopic or molar pregnancy (O00-O07, O08.8)
    • pregnancy, childbirth and the puerperium (O23.-, O75.3, O86.2-)
Inherited from Chapter 14 Diseases of the genitourinary system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Hospice: not accepted as primary

Not accepted as the principal diagnosis on a hospice claim (bill types 081x and 082x). The Integrated OCE returns an edit for this code.
Reason: Manifestation code. Report the underlying condition first (see the Code first note).

Source: CMS Integrated Outpatient Code Editor (IOCE) v27.3, effective October 1, 2026, edit 86

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 5 entries