What is the ICD-9 codes for acute cystitis due to 0157 Shinga toxin producing E coli?

In the ICD-9 coding system, acute cystitis is typically coded as 595.0. However, for the specific case of acute cystitis due to Shiga toxin-producing E. coli (STEC), there isn't a direct ICD-9 code that combines both conditions. Instead, you would code the cystitis as 595.0 and separately code for the infection caused by the E. coli strain, which is generally recorded under 008.45 for enterocolitis due to Shiga toxin-producing E. coli.