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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Article Overview
This article reviews a new hypertension subcategory and the addition of a code for resistant hypertension. It explains the broader clinical and documentation context around resistant, apparent treatment resistant, treatment resistant, and true resistant hypertension, and it discusses how the topic fits within general hypertension coding. The article is aimed at coding professionals and others who need to understand how this new diagnosis category is represented in the coding system and why it matters for identifying a specific hypertensive population.
Why This Topic Matters
Resistant hypertension is a distinct hypertensive condition that may affect diagnosis tracking, risk stratification, and coding accuracy. Understanding the new code and its surrounding documentation context helps support more precise record abstraction and consistent classification of hypertension cases.
What You Will Learn
- How resistant hypertension is defined in the article’s coding context
- Which related terminology is grouped with the new hypertension code
- Why the topic matters for identifying a specific hypertensive population
- How the article frames sequencing within broader hypertension coding
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation improvement staff
- Healthcare revenue cycle professionals
- Healthcare data analysts
Codes Discussed
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