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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Hypertensive Disease 401-405 > Essential Hypertension 401.* >

2008 ICD-9-CM Diagnosis 401.9

Unspecified essential hypertension

 On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date.

The 2009 version of ICD-9-CM 401.9 can be accessed here.

  • 401.9 is a specific code that can be used to specify a diagnosis
  • 401.9 contains 11 index entries
  • View the ICD-9-CM Volume 1 401.* hierarchy

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Index entries containing 401.9:

Blood
  • pressure
    • high (see also Hypertension) 401.9
      • incidental reading (isolated) (nonspecific), without diagnosis of hypertension 796.2
Disease, diseased - see also Syndrome
  • Huchard's (continued arterial hypertension) 401.9
  • hypertensive (see also Hypertension) 401.9
Elevation
  • blood pressure (see also Hypertension) 401.9
    • reading (incidental) (isolated) (nonspecific), no diagnosis of hypertension 796.2
High
  • artery (arterial) tension (see also Hypertension) 401.9
    • without diagnosis of hypertension 796.2
  • blood pressure (see also Hypertension) 401.9
    • incidental reading (isolated) (nonspecific), no diagnosis of hypertension 796.2
Huchard's disease (continued arterial hypertension) 401.9
Hyperpiesia (see also Hypertension) 401.9
Hyperpiesis (see also Hypertension) 401.9
Hypertension, hypertensive (arterial) (arteriolar) (crisis) (degeneration) (disease) (essential) (fluctuating) (idiopathic) (intermittent) (labile) (low renin) (orthostatic) (paroxysmal) (primary) (systemic) (uncontrolled) (vascular) 401.0 401.1 401.9Tension
  • arterial, high (see also Hypertension) 401.9
    • without diagnosis of hypertension 796.2