567 Peritonitis and retroperitoneal infections 
567.0 Peritonitis in infectious diseases classified elsewhere convert 567.0 to ICD-10-CM 567.1 Pneumococcal peritonitis convert 567.1 to ICD-10-CM 567.2 Other suppurative peritonitis 
567.21 Peritonitis (acute) generalized convert 567.21 to ICD-10-CM 567.22 Peritoneal abscess convert 567.22 to ICD-10-CM 567.23 Spontaneous bacterial peritonitis convert 567.23 to ICD-10-CM
567.29 Other suppurative peritonitis convert 567.29 to ICD-10-CM 567.3 Retroperitoneal infections 567.31 Psoas muscle abscess convert 567.31 to ICD-10-CM 567.38 Other retroperitoneal abscess convert 567.38 to ICD-10-CM 567.39 Other retroperitoneal infections convert 567.39 to ICD-10-CM 567.8 Other specified peritonitis 567.81 Choleperitonitis convert 567.81 to ICD-10-CM 567.82 Sclerosing mesenteritis convert 567.82 to ICD-10-CM 567.89 Other specified peritonitis convert 567.89 to ICD-10-CM 567.9 Unspecified peritonitis convert 567.9 to ICD-10-CM