I77.810
✓ BillableThoracic aortic ectasia
Diseases of the circulatory system (I00-I99)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • aortic aneurysm and dissection (I71.-)
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • collagen (vascular) diseases (M30-M36)
- • hypersensitivity angiitis (M31.0)
- • pulmonary artery (I28.-)
Clinical Description
ICD-10-CM code I77.810 represents thoracic aortic ectasia. 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 7-character code at the 6th level of specificity. This is the most specific code available in this subcategory. Coders should note that I77.810 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code I77.810?
ICD-10-CM code I77.810 is "Thoracic aortic ectasia". It belongs to the category: Diseases of the circulatory system (I00-I99).
Is I77.810 a billable ICD-10 code?
Yes, I77.810 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with I77.810?
I77.810 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can I77.810 be coded with other codes?
I77.810 has 3 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in I77.81
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)