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ICD-10-CM 2027

ICD-10 code for coronary syndrome

Choose a code from the options below based on the documentation.

From the official ICD-10-CM alphabetic index entry “Syndrome › coronary”. Page updated September 29, 2026.

About coding coronary syndrome

The official ICD-10-CM index doesn't give a single default code for coronary syndrome; the code depends on the details below.

More specific coronary syndrome codes (official index)

  • acute NEC I24.9 — Acute ischemic heart disease, unspecified
  • insufficiency or intermediate I20.0 — Unstable angina
  • slow flow I20.89 — Other forms of angina pectoris

Common questions about coronary syndrome ICD-10 codes

What is the ICD-10 code for acute nec coronary syndrome?

I24.9 — Acute ischemic heart disease, unspecified.

What is the ICD-10 code for insufficiency or intermediate coronary syndrome?

I20.0 — Unstable angina.

What is the ICD-10 code for slow flow coronary syndrome?

I20.89 — Other forms of angina pectoris.