Billable / Specific Code
ICD-10-CM I25.9 is the diagnosis code for Chronic ischemic heart disease, unspecified. This code falls under the section "Ischemic heart diseases" within Chapter 9 — Diseases of the circulatory system (I00-I99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where I25.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, I25.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
I25.9 is the ICD-10-CM diagnosis code for "Chronic ischemic heart disease, unspecified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of I25.9 is I25 ("Chronic ischemic heart disease"). I25.9 provides a more specific classification within this category.
I25.9 is located in Section I20-I25 — "Ischemic heart diseases" within Chapter 9 of the ICD-10-CM Tabular List.
Use I25.9 when the patients documented diagnosis matches "Chronic ischemic heart disease, unspecified" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Chronic ischemic heart disease, unspecified is I25.9.
Yes, I25.9 can be used as a primary diagnosis code since it is billable and specific.
I25.9 is in Chapter 9 of the ICD-10-CM Tabular List.
Yes, I25.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.