N30Cystitis
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use N30 directly
Use the most specific code supported by the record.
- Chapter XIV
- Diseases of the genitourinary system
- Group N30-N39
- Other diseases of urinary system
- Official Vietnamese name
- Viêm bàng quang
- Additional WHO coding guidance
- Use additional code, if desired, to identify infectious agent (B95- B98) or responsible external agent (Chapter XX). Excl.: prostatocystitis (N41.3)
Related N30 codes
N30.0
Primary diagnosis candidate
Acute cystitis
N30.1
Primary diagnosis candidate
Interstitial cystitis (chronic)
N30.2
Primary diagnosis candidate
Other chronic cystitis
N30.3
Primary diagnosis candidate
Trigonitis
N30.4
Primary diagnosis candidate
Irradiation cystitis
N30.8
Primary diagnosis candidate
Other cystitis
N30.9
Primary diagnosis candidate
Cystitis, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
