AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2023 Issue 4; New/Revised ICD-10-CM Codes

Resistant Hypertension

A new subcategory I1A, Other hypertension, has been created with a new code to describe resistant hypertension (I1A.0). Resistant hypertension (RH) is a condition in which high blood pressure does not respond to antihypertensive drugs. RH is also called “apparent treatment resistant hypertension,” “treatment resistant hypertension,” and “true resistant hypertension.” These terms are included under code I1A.0, Resistant hypertension. Hypertension is considered resistant when blood pressure remains above goal regardless of the concurrent use of at least three antihypertensive medications of different pharmacologic classes, such as a calcium channel blocker...

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