N30 is the ICD-10 code for Cystitis. It is a three-character category divided into 7 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block N30–N39 (Other diseases of urinary system) in Chapter XIV, Diseases of the genitourinary system.
- Code type
- Category (3 characters)
- Chapter
- XIV · N00–N99
- Classification
- WHO ICD-10, 2019 version
What N30 excludes
Conditions that look similar but belong under another code.
- prostatocystitis N41.3
Coding notes
- Use additional code, if desired, to identify infectious agent (B95-B98) or responsible external agent (Chapter XX).
Subcodes of N30
N30 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DN30Blærebetændelse
N30Virtsarakkotulehdus
N30Zystitis
N30Cystite
N30cystitis
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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