Diseases of peritoneum and retroperitoneum (K65-K68)

ICD-10 codes K65-K68 cover diseases affecting the peritoneum and retroperitoneum, including various types of peritonitis, abscesses, adhesions, and disorders within the abdominal and retroperitoneal spaces. This range specifically addresses inflammatory, infectious, fibrotic, and hemorrhagic conditions impacting these body areas.

Codes in the K65 series identify different forms of peritonitis, such as generalized acute peritonitis (K65.0), spontaneous bacterial peritonitis (K65.2), peritoneal abscess (K65.1), and bile-related inflammation known as choleperitonitis (K65.3). Synonyms like "acute infectious generalized peritonitis" and "primary bacterial peritonitis" help clarify coding accuracy. The K66 subgroup relates to other peritoneal disorders like postinfection or postprocedural adhesions (K66.0) and hemoperitoneum (K66.1), which describes bleeding within the peritoneal cavity. Finally, the K68 codes address conditions involving the retroperitoneum, including abscesses such as psoas muscle abscess (K68.12), retroperitoneal fibrosis (K68.2), and hematomas (K68.3). These codes assist coders in accurately recording complex abdominal and retroperitoneal infections, inflammations, and fluid collections.