Chapter 9 guidelines
Diseases of the circulatory system
I00-I99
Covers diseases of the circulatory system, including hypertension, ischemic heart disease, and cerebrovascular disease.
Key coding points
- •ICD-10-CM presumes a causal relationship between hypertension and heart disease, and between hypertension and chronic kidney disease, when both are documented — no explicit linking statement from the provider is required for those combination codes.
- •Sequelae of cerebrovascular disease (I69.-) are used once the acute phase has resolved but a residual deficit remains.