I20.8Other forms of angina pectoris

I20.8 is the ICD-10-CM diagnosis code for other forms of angina pectoris. It belongs to category I20 (angina pectoris), block I20-I25 (ischemic heart diseases) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within I20, choose I20.8 (Other forms of angina pectoris) only when documentation doesn't support a more specific option: unstable angina (I20.0), with documented spasm (I20.1), refractory angina pectoris (I20.2) and unspecified (I20.9).

To report this condition, pick the subcode that matches the documentation: I20.81 (dysfunction) and I20.89 (pectoris).

Use an additional code(s) for symptoms associated with angina equivalent. Use an additional code to identify: exposure to environmental tobacco smoke (Z77.22), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and tobacco use (Z72.0).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2024 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 413.9 (other and unspecified angina pectoris).