hypertension

DEFINITION of hypertension

Hypertension is a chronic cardiovascular condition in which the force exerted by circulating blood against the vessel walls remains consistently above normal thresholds. It is classified as primary (essential) — accounting for roughly 90-95% of all cases with no identifiable underlying cause — or secondary, where a distinct cause such as renal artery stenosis, primary aldosteronism, or medication side effects can be identified. Often called the “silent killer,” hypertension rarely causes symptoms until it has already damaged target organs including the heart, kidneys, brain, and retina. The term entered medical use in 1863-1896, and true clinical measurement became possible only after Scipione Riva-Rocci invented the cuff-based sphygmomanometer in 1896. The concept of essential hypertension was formally coined by Eberhard Frank in 1911 to describe elevated BP with no identifiable etiology.

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ETYMOLOGY of hypertension

greek

Three components combine to form the word:

Component	Origin	Meaning
hyper-	Greek ὑπέρ (hypér)	Over, above, excessive, beyond normal
tens-	Latin tendere	To stretch, to be tense
-ion	Latin -io	Condition/state of

The word literally means “the condition of excessive tension/stretching” — referring to the tension within the arterial walls under pressure. It was likely modeled after the French hypertension, first recorded in English around 1893.

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Aliases & Related Terms

• HTN — standard clinical abbreviation

• High blood pressure (HBP) — lay/patient-facing term

• Essential hypertension — primary HTN with no identifiable cause

• Secondary hypertension — HTN driven by an underlying condition (renal, endocrine, drug-induced)

• Malignant hypertension — severe HTN with retinopathy and rapid organ failure; coined 1928 at the Mayo Clinic

• Resistant hypertension — BP remaining uncontrolled on ≥3 antihypertensive agents

• Hypertensive crisis — umbrella term for urgency and emergency

• Hyperpiesia — older term used by Sir Clifford Allbutt

• Renovascular hypertension — secondary HTN from renal artery stenosis

• Isolated systolic hypertension (ISH) — elevated systolic with normal diastolic; common in elderly patients

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CODING CORNER

ICD-10-CM Codes

Hypertension codes fall under Chapter 9: Diseases of the Circulatory System, category range I10-I1A. Note the ICD-10-CM coding guideline: when a causal relationship between hypertension and heart disease or CKD is documented, use the combination codes from I11-I13 rather than coding them separately.aapc+1

ICD-10-CM Code	Description
I10	Essential (primary) hypertension
I11.0	Hypertensive heart disease with heart failure
I11.9	Hypertensive heart disease without heart failure
I12.9	Hypertensive chronic kidney disease, stage 1-4 or unspecified
I12.10	Hypertensive CKD with stage 5 CKD or ESRD, without HD
I13.0	Hypertensive heart & CKD with HF and stage 1-4 CKD
I13.2	Hypertensive heart & CKD with HF and stage 5 CKD/ESRD
I15.0	Renovascular hypertension
I15.1	HTN secondary to other renal disorders
I15.2	HTN secondary to endocrine disorders
I16.0	Hypertensive urgency
I16.1	Hypertensive emergency

🩺 Inpatient profee coder tip: Per FY2026 ICD-10-CM Official Guidelines, hypertension with conditions classified to I50.- (Heart Failure), I51.4 (Myocarditis, unspecified), I51.89, and I51.9 is now assigned to category I11, not separately. Always check for updated Chapter 9 combination code guidance each fiscal year — it trips up even experienced coders!

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CPT & Monitoring Codes

Code	Description

Code	Description
99212-99215	E/M established patient visit for HTN management
99473	Self-measured BP using validated device; patient education/training
99474	Self-measured BP; 30-day data collection (min. 12 readings), report of averages, treatment plan
93784	Ambulatory blood pressure monitoring (ABPM), 24-hour, with interpretation
93788	ABPM, 24-hour recording without interpretation
93790	ABPM review with physician interpretation and report
3074F / 3075F	CPT II: most recent BP < 140/90 mmHg / BP ≥ 140/90 mmHg (HEDIS quality measures)
3078F / 3079F	CPT II: diastolic BP reading reported

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DERIVATIONS of hypertension

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Query functionality

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Med roots Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms