Non-Billable / Non-Specific Code
ICD-10-CM I22 is the diagnosis code for Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction. This code falls under the section "Ischemic heart diseases" within Chapter 9 — Diseases of the circulatory system (I00-I99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as I22. They are mutually exclusive:
Understanding where I22 sits in the ICD-10-CM classification helps ensure proper coding:
No, I22 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
I22 is the ICD-10-CM diagnosis code for "Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
I22 is located in Section I20-I25 — "Ischemic heart diseases" within Chapter 9 of the ICD-10-CM Tabular List.
I22 has 5 sub-code(s) that provide more specific detail: I22.0, I22.1, I22.2, I22.8, I22.9.
Use I22 when the patients documented diagnosis matches "Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction is I22.
No, I22 is non-billable. Use a more specific sub-code for primary diagnosis billing.
I22 is in Chapter 9 of the ICD-10-CM Tabular List.
Type 1 Excludes for I22 include: subsequent myocardial infarction, type 2 (I21.A1); subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9).
Yes, I22 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.