Convert ICD-10 Code I30.9 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
I30.9 Acute pericarditis, unspecified		420.90 Acute pericarditis NOS
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.
I30.9 Acute pericarditis, unspecified		420.99 Acute pericarditis NEC
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

ICD-10 to ICD-9 crosswalk for code I30.9 - acute pericarditis, unspecified based on the most recent General Equivalence Mappings (GEMS) information.