I45.5
✓ BillableOther specified heart block
Diseases of the circulatory system (I00-I99)
Also Known As
❌ Excludes1
directThese codes are mutually exclusive. Never code them together.
- • heart block NOS (I45.9)
Clinical Description
ICD-10-CM code I45.5 represents other specified heart block. This code falls under the Diseases of the circulatory system (I00-I99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory. Coders should note that I45.5 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code I45.5?
ICD-10-CM code I45.5 is "Other specified heart block". It belongs to the category: Diseases of the circulatory system (I00-I99).
Is I45.5 a billable ICD-10 code?
Yes, I45.5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with I45.5?
I45.5 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in I45
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)