Alphabetic Index FY2027

I25.8

Other forms of 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.

I25.8 is a non-billable ICD-10-CM code header for other forms of 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 I25.81 Atherosclerosis of other coronary vessels without angina pectoris, I25.82 Chronic total occlusion of coronary artery, I25.83 Coronary atherosclerosis due to lipid rich plaque, I25.84 Coronary atherosclerosis due to calcified coronary lesion and 2 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.

Inherited from I25 Chronic ischemic heart disease
  • 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.

Inherited from I25 Chronic ischemic heart disease
  • 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 I25.8 6