I25.82 Chronic total occlusion of coronary artery

Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

Also covers

• Complete occlusion of coronary artery
• Total occlusion of coronary artery

Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

• acute coronary occlusion with myocardial infarction (I21.0-I21.B, I22.-)
• acute coronary occlusion without myocardial infarction (I24.0)

Excludes2

Not part of this code, but both can be coded when both are documented.

• non-ischemic myocardial injury (I5A)

Code first

Code the underlying condition first, then this code.

• coronary atherosclerosis (I25.1-, I25.7-, I25.81-)

Use additional code

Add a second code for the following, when documented.

• code to identify:
• chronic total occlusion of coronary artery (I25.82)
• exposure to environmental tobacco smoke (Z77.22)
• history of tobacco dependence (Z87.891)
• occupational exposure to environmental tobacco smoke (Z57.31)
• tobacco dependence (F17.-)
• tobacco use (Z72.0)

Code also

A second code may be needed. Sequencing depends on the encounter.

• the presence of hypertension (I10-I1A)