Disorders of arteries, arterioles and capillaries in diseases classified elsewhere (I79)

The ICD-10 code I79 and its subcodes categorize disorders affecting arteries, arterioles, and capillaries that occur as part of other underlying diseases. These codes are used when vascular problems like aneurysms, inflammation, or other arterial issues are linked to systemic conditions listed elsewhere in medical classifications.

ICD-10 code I79.0I79.1Immunoglobulin G4 related disease and its variants like Immunoglobulin G4 related aortitis or periaortitis. This highlights inflammation of the aorta tied to immune system disorders. The category I79.8vascular thoracic outlet syndrome, autoimmune vasculitis, or calciphylaxis, which involves calcification of small blood vessels, especially in patients with kidney disease. Understanding these codes helps medical coders accurately identify vascular complications related to systemic illnesses, ensuring precise documentation and management.