Convert ICD-10 Code K57.21 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
K57.21 Dvtrcli of lg int w perforation and abscess w bleeding		562.13 Dvrtcli colon w hmrhg
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.
K57.21 Dvtrcli of lg int w perforation and abscess w bleeding		569.5 Intestinal abscess
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.

ICD-10 to ICD-9 crosswalk for code K57.21 - diverticulitis of large intestine with perforation and abscess with bleeding based on the most recent General Equivalence Mappings (GEMS) information.