| N30 | Cystitis |
| N30.0 | Acute cystitis |
| N30.00 | Acute cystitis without hematuria |
| N30.01 | Acute cystitis with hematuria |
| N30.1 | Interstitial cystitis (chronic) |
| N30.10 | Interstitial cystitis (chronic) without hematuria |
| N30.11 | Interstitial cystitis (chronic) with hematuria |
| N30.2 | Other chronic cystitis |
| N30.20 | Other chronic cystitis without hematuria |
| N30.21 | Other chronic cystitis with hematuria |
| N30.3 | Trigonitis |
| N30.30 | Trigonitis without hematuria |
| N30.31 | Trigonitis with hematuria |
| N30.4 | Irradiation cystitis |
| N30.40 | Irradiation cystitis without hematuria |
| N30.41 | Irradiation cystitis with hematuria |
| N30.8 | Other cystitis |
| N30.80 | Other cystitis without hematuria |
| N30.81 | Other cystitis with hematuria |
| N30.9 | Cystitis, unspecified |
| N30.90 | Cystitis, unspecified without hematuria |
| N30.91 | Cystitis, unspecified with hematuria |
| N31 | Neuromuscular dysfunction of bladder, not elsewhere classified |
| N31.0 | Uninhibited neuropathic bladder, not elsewhere classified |
| N31.1 | Reflex neuropathic bladder, not elsewhere classified |
| N31.2 | Flaccid neuropathic bladder, not elsewhere classified |
| N31.8 | Other neuromuscular dysfunction of bladder |
| N31.9 | Neuromuscular dysfunction of bladder, unspecified |
| N32 | Other disorders of bladder |
| N32.0 | Bladder-neck obstruction |
| N32.1 | Vesicointestinal fistula |
| N32.2 | Vesical fistula, not elsewhere classified |
| N32.3 | Diverticulum of bladder |
| N32.8 | Other specified disorders of bladder |
| N32.81 | Overactive bladder |
| N32.89 | Other specified disorders of bladder |
| N32.9 | Bladder disorder, unspecified |
| N33 | Bladder disorders in diseases classified elsewhere |
| N34 | Urethritis and urethral syndrome |
| N34.0 | Urethral abscess |
| N34.1 | Nonspecific urethritis |
| N34.2 | Other urethritis |
| N34.3 | Urethral syndrome, unspecified |
| N35 | Urethral stricture |
| N35.0 | Post-traumatic urethral stricture |
| N35.01 | Post-traumatic urethral stricture, male |
| N35.010 | Post-traumatic urethral stricture, male, meatal |
| N35.011 | Post-traumatic bulbous urethral stricture |
| N35.012 | Post-traumatic membranous urethral stricture |
| N35.013 | Post-traumatic anterior urethral stricture |
| N35.014 | Post-traumatic urethral stricture, male, unspecified |
| N35.02 | Post-traumatic urethral stricture, female |
| N35.021 | Urethral stricture due to childbirth |
| N35.028 | Other post-traumatic urethral stricture, female |
| N35.1 | Postinfective urethral stricture, not elsewhere classified |
| N35.11 | Postinfective urethral stricture, not elsewhere classified, male |
| N35.111 | Postinfective urethral stricture, not elsewhere classified, male, meatal |
| N35.112 | Postinfective bulbous urethral stricture, not elsewhere classified |
| N35.113 | Postinfective membranous urethral stricture, not elsewhere classified |
| N35.114 | Postinfective anterior urethral stricture, not elsewhere classified |
| N35.119 | Postinfective urethral stricture, not elsewhere classified, male, unspecified |
| N35.12 | Postinfective urethral stricture, not elsewhere classified, female |
| N35.8 | Other urethral stricture |
| N35.9 | Urethral stricture, unspecified |
| N36 | Other disorders of urethra |
| N36.0 | Urethral fistula |
| N36.1 | Urethral diverticulum |
| N36.2 | Urethral caruncle |
| N36.4 | Urethral functional and muscular disorders |
| N36.41 | Hypermobility of urethra |
| N36.42 | Intrinsic sphincter deficiency (ISD) |
| N36.43 | Combined hypermobility of urethra and intrinsic sphincter deficiency |
| N36.44 | Muscular disorders of urethra |
| N36.5 | Urethral false passage |
| N36.8 | Other specified disorders of urethra |
| N36.9 | Urethral disorder, unspecified |
| N37 | Urethral disorders in diseases classified elsewhere |
| N39 | Other disorders of urinary system |
| N39.0 | Urinary tract infection, site not specified |
| N39.3 | Stress incontinence (female) (male) |
| N39.4 | Other specified urinary incontinence |
| N39.41 | Urge incontinence |
| N39.42 | Incontinence without sensory awareness |
| N39.43 | Post-void dribbling |
| N39.44 | Nocturnal enuresis |
| N39.45 | Continuous leakage |
| N39.46 | Mixed incontinence |
| N39.49 | Other specified urinary incontinence |
| N39.490 | Overflow incontinence |
| N39.498 | Other specified urinary incontinence |
| N39.8 | Other specified disorders of urinary system |
| N39.9 | Disorder of urinary system, unspecified |