I21.A1 is a billable/specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Myocardial infarction type 2.
Inclusion term
Myocardial infarction due to demand ischemia
Myocardial infarction secondary to ischemic imbalance
Code first
If applicable, the underlying cause, such as:
Anemia (D50.0-D64.9)
Chronic obstructive pulmonary disease (J44.-)
Paroxysmal tachycardia (I47.0-I47.9)
Shock (R57.0-R57.9)
Versions
2025
Code changed
Code first
the underlying cause, such as:anemia (D50.0-D64.9)chronic obstructive pulmonary disease (J44.-)paroxysmal tachycardia (I47.0-I47.9)shock (R57.0-R57.9)
- , if applicable, the underlying cause, such as:
- anemia (D50.0-D64.9)
- chronic obstructive pulmonary disease (J44.-)
- paroxysmal tachycardia (I47.0-I47.9)
- shock (R57.0-R57.9)
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
Code changed
Code also
the underlying cause, if known and applicable, such as:anemia (D50.0-D64.9)chronic obstructive pulmonary disease (J44.-)heart failure (I50.-)paroxysmal tachycardia (I47.0-I47.9)renal failure (N17.0-N19)shock (R57.0-R57.9)
Code first
- the underlying cause, such as:
- anemia (D50.0-D64.9)
- chronic obstructive pulmonary disease (J44.-)
- paroxysmal tachycardia (I47.0-I47.9)
- shock (R57.0-R57.9)
2019
No changes
2018
New code