AHA Coding Clinic® for ICD-9 - 1984 July - August

Coding Hypertension (401-405)

Questions on coding hypertension, additional terms describing hypertension, and the sequence of code assignment for external reporting provide the basis for the following information and coding guidelines to assist hospital coders. Elevated Blood Pressure Blood pressure changes from one occasion of measurement to another. Also, arterial pressure often increases with age. Because of these variables, the diagnosis of hypertension is made on a series of blood pressure readings rather than on an isolated reading. The World Health Organization places the upper limits of normal blood pressure at 160/95. An elevated blood pressure reading without a diagnosis of hypertension (796...

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