ICD 9 Code for Hypertension

ICD 9 Coding for Hypertension

Hypertension, also referred to as high blood pressure, HTN or HPN, is a medical condition in which the blood pressure is chronically elevated.

ICD-9-CM Codes

Category 401 with the following fourth digit classifications

401.0 Malignant
401.1 Benign
401.9 Unspecified

Elevated blood pressure without diagnosis of hypertension is coded to 796.2


ICD 9 Codes for Hypertension and chronic kidney disease

Category 403 of ICD-9-CM is to be used as a combination code for hypertension and chronic kidney disease and the fifth digit describes the stage of the kidney disease.

403.0 Malignant
403.1 Benign
403.9 Unspecified

With fifth digit classifications

0 with chronic kidney disease stage I through stage IV, or unspecified.
1 with chronic kidney disease stage V or end stage renal disease.

Additional code should be used to identify the stage of chronic kidney disease from the category 585 (585.1-585.4, 585.9)

Category 404 Hypertensive heart and chronic kidney disease

When a patient has both hypertensive kidney disease and also hypertensive heart disease then this condition is coded to category 404 with the fifth digit describing the whether there is heart failure associated and also the type of chronic kidney disease as follows:

0 without heart failure and with chronic kidney disease stage I through IV, or unspecified

1 with heart failure and with chronic kidney disease stage I through stage IV, or unspecified
2 without heart failure and with chronic kidney disease stage V or end stage renal disease
3 with heart failure and chronic kidney disease stage V or end stage renal disease

Additional codes are required for the type of heart failure if present and also the stage of chronic kidney disease.


Coding scenarios:
Hypertension + High blood pressure = 401.9 only as high blood pressure is included in 401.9.

Hypertension + Chronic Kidney Disease = 403.90 and 585.9

Hypertension + Chronic Kidney Disease Stage III = 403.90 and 585.3

Hypertension + End Stage Renal Disease(ESRD) = 403.91 and 585.6

Hypertension + Chronic Renal Failure = 403.90 and 585.9

Hypertension + Acute Renal Failure = 401.9 and 584.9

Hypertensive Congestive heart failure + Chronic Renal Failure = 404.91, 428.0, and 585.9


Tags: ICD 9 Code for Hypertension, ICD 9 CM Code for Hypertension