Question 1

Is I21 a billable ICD-10 code?

Accepted Answer

No, I21 is not a billable code. It is a category code that requires additional specificity. You must select a more specific code from the subcategories for billing purposes.

Question 2

What does ICD-10 code I21 mean?

Accepted Answer

ICD-10-CM code I21 represents Acute myocardial infarction. This code is part of the International Classification of Diseases, 10th Revision, Clinical Modification used for medical coding and billing in the United States.

Question 3

When was ICD-10 code I21 introduced?

Accepted Answer

Code I21 has been part of ICD-10-CM since 2016, when the coding system was mandated for use in the United States. This code was included in the original US implementation.

Question 4

What is the parent category for ICD-10 code I21?

Accepted Answer

The parent category for I21 is section:I20-I25 (Ischemic heart diseases (I20-I25)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions should be coded separately from I21?

Accepted Answer

Code I21 has Type 2 Excludes including: old myocardial infarction (I25.2); postmyocardial infarction syndrome (I24.1); subsequent type 1 myocardial infarction (I22.-). These conditions are not included in I21 but can be coded together if the patient has both conditions.

Question 6

Should I use additional codes with I21?

Accepted Answer

Yes, when coding I21, consider adding codes for: code, if applicable, to identify:; exposure to environmental tobacco smoke (Z77.22). Additional codes provide more specificity about the patient's condition.

I212026

Excludes213Not included here

Code Also1Consider additional code

Use Additional Code7Add code for detail

Includes7Included conditions