Convert ICD-10 Code I20.1 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
I20.1 Angina pectoris with documented spasm		413.1 Prinzmetal angina

ICD-10 to ICD-9 crosswalk for code I20.1 - angina pectoris with documented spasm based on the most recent General Equivalence Mappings (GEMS) information.