All ICD10 Codes

I25

Non-Billable
ChapterI00–I99
Rankcategory
Official Description

Chronic ischemic heart disease

Use a more specific code (5 billable, 4 non-billable)
I25.1Atherosclerotic heart disease of native coronary arteryhas subcodesI25.2Old myocardial infarctionI25.3Aneurysm of heartI25.4Coronary artery aneurysm and dissectionhas subcodesI25.5Ischemic cardiomyopathyI25.6Silent myocardial ischemiaI25.7Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectorishas subcodesI25.8Other forms of chronic ischemic heart diseasehas subcodesI25.9Chronic ischemic heart disease, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).

CH9 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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.-)

I20-I25 Parent Instructions

Code Also
  • the presence of hypertension (I10-I1A)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • non-ischemic myocardial injury (I5A)
Use Additional 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)

Clinical Hierarchy

BillableHas subcodes
CH9Diseases of the circulatory system (I00-I99)
I20-I25Ischemic heart diseases (I20-I25)
I25Chronic ischemic heart diseaseNot billable
I25.1Atherosclerotic heart disease of native coronary arterySubcodes
I25.2Old myocardial infarctionBillable
I25.3Aneurysm of heartBillable
I25.4Coronary artery aneurysm and dissectionSubcodes
I25.5Ischemic cardiomyopathyBillable
I25.6Silent myocardial ischemiaBillable
I25.7Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectorisSubcodes
I25.8Other forms of chronic ischemic heart diseaseSubcodes
I25.9Chronic ischemic heart disease, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I25:

blockI20-I25
Ischemic heart diseases (I20-I25)
View context instructions
chapterCH9
Diseases of the circulatory system (I00-I99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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