ICD-10 Code I20 – Angina pectoris (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I20 – Angina pectoris
What it is
I20 identifies angina pectoris, a syndrome of chest discomfort caused by reduced blood flow to the heart muscle. Use it when documentation states angina without a more specific subtype.
Clinical signs
Typical findings include pressure, tightness, or squeezing chest pain, often triggered by exertion or stress and relieved by rest. Clinical features vary; refer to documentation.
When to use this code
Use I20 when the provider documents angina pectoris and does not specify unstable, spasm-related, or another more detailed category. It also fits encounters focused on evaluation of documented angina. You should code the documented type exactly when the record names it.
Do not use for
Do not use I20 for acute myocardial infarction, nonspecific chest pain, or other cardiac ischemic conditions without documented angina. Check documentation if the note is unclear.
Coding tip
Confirm whether the record names stable, unstable, or variant angina before assigning I20.