Learn all about ICD 9 Codes for Hypertension (HTN). Hypertension is the term used to describe high blood pressure. High blood pressure (hypertension) is when your blood pressure is 140/90 mmHg most of the time, occurs when the arterioles narrow, causing the blood to exert excessive pressure against the vessel wall and the heart must work harder to maintain the higher pressure.

ICD 9 Codes for Hypertension classificification by type is as follows:
  1. Malignant
  2. Benign
  3. Unspecified

ICD 9 Codes for Hypertension (HTN)

Hypertension ICD 9 Codes 401-405

ICD 9 codes for Hypertension are categorized as below according to Hypertensive Disease (401-405). Please click on the category link to learn further:








ICD 9 Codes 401 for Essential ypertension

ICD 9 codes for Essential hypertension 401.0, 401.1, 401.9








ICD 9 Codes 402 for Hypertensive Heart Disease

ICD 9 codes for Hypertensive heart disease 402.00, 402.01, 402.10, 402.11, 402.90, 402.91








ICD 9 Codes 403 for Hypertensive Chronic Kidney Disease

ICD 9 codes for Hypertensive chronic kidney disease 403.00, 403.01, 403.10, 403.11, 403.90, 403.91








ICD 9 Codes 404 for Hypertensive Heart & Chronic Kidney Disease

ICD 9 codes 404.00, 404.01, 404.02, 404.03 ,404.10, 404.11, 404.12, 404.13, 404.90, 404.91, 404.92, 404.93








ICD 9 Codes 405 for Secondary Hypertension

ICD 9 codes for Secondary hypertension 405.01, 405.09, 405.11, 405.19, 405.91, 405.99

Hypertensive Disease Excludes: complicating pregnancy, childbirth, or the puerperium (642.0-642.9) that involving coronary vessels (410.00-414.9)

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