Acute cystitis

This code represents an acute inflammation of the urinary bladder, typically caused by a bacterial infection. Patients often present with sudden onset of dysuria, urinary frequency, urgency, and suprapubic pain. It is a common form of urinary tract infection (UTI).

Apply this code when documentation clearly indicates a new or sudden onset of bladder inflammation, often confirmed by urinalysis showing bacteriuria and pyuria, or a positive urine culture. It is appropriate for initial episodes or acute exacerbations of cystitis.

• Differentiate from chronic cystitis (e.g., interstitial cystitis) which has different ICD-9 codes.
• Do not use for asymptomatic bacteriuria unless specific symptoms of acute cystitis are present.
• Consider sequencing with codes for underlying conditions or causative organisms if known and documented.