595 Cystitis 
595.0 Acute cystitis convert 595.0 to ICD-10-CM 595.1 Chronic interstitial cystitis convert 595.1 to ICD-10-CM 595.2 Other chronic cystitis convert 595.2 to ICD-10-CM 595.3 Trigonitis convert 595.3 to ICD-10-CM 595.4 Cystitis in diseases classified elsewhere convert 595.4 to ICD-10-CM 595.8 Other specified types of cystitis 
595.81 Cystitis cystica convert 595.81 to ICD-10-CM 595.82 Irradiation cystitis convert 595.82 to ICD-10-CM
595.89 Other specified types of cystitis convert 595.89 to ICD-10-CM 595.9 Cystitis unspecified convert 595.9 to ICD-10-CM