ICD-10 Code I20.9 – Angina pectoris, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I20.9 – Angina pectoris, unspecified
What it is
I20.9 identifies angina pectoris when the type is not specified. Use it for chest discomfort or pressure due to myocardial ischemia when the record does not name a more specific angina form.
Clinical signs
Typical findings include chest pain, tightness, or pressure that may radiate to the arm, neck, jaw, or back. Clinical features vary; refer to documentation for the exact angina description.
When to use this code
Use I20.9 when the provider documents angina pectoris but does not specify stable, unstable, or another subtype. It also fits when the note confirms angina but the available documentation is incomplete. Do not assume a more specific category without support in the record.
Do not use for
Do not use this code for chest pain without a diagnosis of angina pectoris. If the record identifies a specific angina type, code that diagnosis instead. Check documentation.
Coding tip
Query the provider if the note says only “chest pain” or leaves the angina type unclear.