ICD-10 Diagnosis Code R03

Abnormal blood-pressure reading, without diagnosis

Diagnosis Code R03

ICD-10: R03
Short Description: Abnormal blood-pressure reading, without diagnosis
Long Description: Abnormal blood-pressure reading, without diagnosis
This is the 2017 version of the ICD-10-CM diagnosis code R03

Not Valid for Submission
The code R03 is a "header" and not valid for submission for HIPAA-covered transactions.

Code Classification
  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99)
    • Symptoms and signs involving the circulatory and respiratory systems (R00-R09)
      • Abnormal blood-pressure reading, without diagnosis (R03)

Information for Patients


High Blood Pressure

Also called: Benign essential hypertension, Essential hypertension, HBP, HTN, Hypertension

Blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps 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 called diastolic pressure.

Your blood pressure reading uses these two numbers. Usually the systolic number comes before or above the diastolic number. A reading of

  • 119/79 or lower is normal blood pressure
  • 140/90 or higher is high blood pressure
  • Between 120 and 139 for the top number, or between 80 and 89 for the bottom number is called prehypertension. Prehypertension means you may end up with high blood pressure, unless you take steps to prevent it.

High blood pressure usually has no symptoms, but it can cause serious problems such as stroke, heart failure, heart attack and kidney failure.

You can control high blood pressure through healthy lifestyle habits such as exercise and the DASH diet and taking medicines, if needed.

NIH: National Heart, Lung, and Blood Institute

  • ACE inhibitors
  • Blood pressure measurement
  • Blood pressure monitors for home
  • Controlling your high blood pressure
  • Drug-induced hypertension
  • High blood pressure
  • High blood pressure and eye disease
  • High blood pressure medications
  • Hypertensive heart disease
  • Low-salt diet
  • Malignant hypertension
  • Renovascular hypertension
  • Talk with Your Health Care Provider about High Blood Pressure (Agency for Healthcare Research and Quality)


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Low Blood Pressure

Also called: Hypotension, LBP

You've probably heard that high blood pressure is a problem. Sometimes blood pressure that is too low can also cause problems.

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. 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 a medical condition or certain medicines. Some people may have symptoms of low blood pressure when standing up too quickly. Low blood pressure is a problem only if it causes dizziness, fainting or in extreme cases, shock.

NIH: National Heart, Lung, and Blood Institute

  • Low blood pressure


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