I25

Chronic ischemic heart disease

FY2027Chapter 9: Diseases of the circulatory system/I20–I25 Ischemic heart diseases

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

Use additional code
Code also
Excludes2

I25 is a non-billable ICD-10-CM code category for chronic ischemic heart disease. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are I25.1 Atherosclerotic heart disease of native coronary artery, I25.2 Old myocardial infarction, I25.3 Aneurysm of heart, I25.4 Coronary artery aneurysm and dissection and 5 more. Its coding notes include a Use additional code instruction, a Code also instruction and 11 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

This code

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

Two codes may be needed to describe the condition. This note gives no sequencing order.

Also from chapter/block level (1 note)

Inherited from I20–I25 Ischemic heart diseases

the presence of hypertension (I10-I1A)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code

non-ischemic myocardial injury (I5A)

Also from chapter/block level (10 notes)

Inherited from Chapter 9 Diseases of the circulatory system

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
systemic connective tissue disorders (M30-M36)
transient cerebral ischemic attacks and related syndromes (G45.-)

More specific codes under I25 9