Specific code 2015 ICD-9-CM Diagnosis Code 458.9
Hypotension, unspecified
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 458.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 458.9 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 458.9 converts directly to:
  • 2015/16 ICD-10-CM I95.9 Hypotension, unspecified
Approximate Synonyms
  • Hypotension
  • Hypotension (low blood pressure)
  • Low blood pressure
Clinical Information
  • A disorder characterized by a blood pressure that is below the normal expected for an individual in a given environment
  • Abnormally low blood pressure
  • Abnormally low blood pressure that can result in inadequate blood flow to the brain and other vital organs. Common symptom is dizziness but greater negative impacts on the body occur when there is prolonged depravation of oxygen and nutrients
  • Any blood pressure that is below the normal expected for an individual in a given environment
  • Functions related to a fall in systolic or diastolic blood pressure below normal for the age
  • You've probably heard that high blood pressure is a problem. So what about low blood pressure?blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps out blood into the arteries. Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure. When your heart is at rest, between beats, your blood pressure falls. This is the diastolic pressure. Your blood pressure reading uses these two numbers. Both are important. Usually they're written one above or before the other, such as 120/80. If your blood pressure reading is 90/60 or lower, you have low blood pressure. Some people have low blood pressure all the time. They have no symptoms and their low readings are normal for them. In other people, blood pressure drops below normal because of some event or medical condition. Some people may experience symptoms of low pressure when standing up too quickly. Low blood pressure is a problem only if it causes dizziness, fainting or in extreme cases, shock
Applies To
  • Hypotension (arterial) NOS
ICD-9-CM Volume 2 Index entries containing back-references to 458.9:
  • Abnormal, abnormality, abnormalities - see also Anomaly
    • blood pressure
      • elevated (without diagnosis of hypertension) 796.2
      • low (see also Hypotension) 458.9
        • reading (incidental) (isolated) (nonspecific) 796.3
  • Blood
    • pressure
      • decreased, due to shock following injury 958.4
      • fluctuating 796.4
      • high (see also Hypertension) 401.9
        • borderline 796.2
        • incidental reading (isolated) (nonspecific), without diagnosis of hypertension 796.2
      • low (see also Hypotension) 458.9
        • incidental reading (isolated) (nonspecific), without diagnosis of hypotension 796.3
  • Constitutional - see also condition
    • arterial hypotension (see also Hypotension) 458.9
  • Hypotension (arterial) (constitutional) 458.9
    • maternal, syndrome (following labor and delivery) 669.2
    • orthostatic (chronic) 458.0
      • dysautonomic-dyskinetic syndrome 333.0
    • permanent idiopathic 458.1
  • Low
    • blood pressure (see also Hypotension) 458.9
      • reading (incidental) (isolated) (nonspecific) 796.3
  • Pressure
    • hyposystolic (see also Hypotension) 458.9
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 458.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.