2025 ICD-10-CM Diagnosis Code I10

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Essential (primary) hypertension

  • I10 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM I10 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of I10 – other international versions of ICD-10 I10 may differ.

ICD-10-CM Coding Rules

  • I10 is not usually sufficient justification for admission to an acute care hospital when used a principal diagnosis.

Type 1 Excludes

Type 2 Excludes

  • essential (primary) hypertension involving vessels of brain (I60-I69 )
  • essential (primary) hypertension involving vessels of eye (H35.0-)

Includes

  • high blood pressure
  • hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)

The following code(s) above I10 contain annotation back-references

 that may be applicable to I10:

  • I00-I99  Diseases of the circulatory system
  • I10-I1A  Hypertensive diseases

Approximate Synonyms

  • Benign essential hypertension
  • Benign essential hypertension (htn)
  • Benign hypertension
  • Bilateral hypertensive retinopathy
  • Essential hypertension
  • Essential hypertension (high blood pressure)
  • Hypertension
  • Hypertension (high blood pressure)
  • Hypertension, uncontrolled
  • Hypertensive disorder
  • Hypertensive emergency
  • Hypertensive retinopathy, both eyes
  • Hypertensive urgency
  • Labile systemic arterial hypertension
  • Left hypertensive retinopathy
  • Left hypertensive retinopathy (eye condition)
  • Malignant hypertension
  • Nutritional therapy for hypertension
  • Nutritional therapy for hypertension done
  • Right hypertensive retinopathy
  • Uncontrolled hypertension
  • White coat syndrome

Clinical Information

  • A blood pressure of 140/90 or higher. High blood pressure usually has no symptoms. It can harm the arteries and cause an increase in the risk of stroke, heart attack, kidney failure, and blindness.
  • A disorder characterized by a pathological increase in blood pressure; a repeatedly elevation in the blood pressure exceeding 140 over 90 mm hg.
  • 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, the systolic and diastolic pressures. Usually they are written one above or before the other. A reading of
    • 120/80 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 prehypertension
    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 and taking medicines, if needed.
  • Hypertension occurring without preexisting renal disease or known organic cause.
  • Pathological increase in blood pressure; a repeatedly elevated blood pressure exceeding 140 over 90 mmhg.
  • Persistantly high arterial blood pressure.
  • Persistently high systemic arterial blood pressure. Based on multiple readings (blood pressure determination), hypertension is currently defined as when systolic pressure is consistently greater than 140 mm hg or when diastolic pressure is consistently 90 mm hg or more.

ICD-10-CM I10 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 304 Hypertension with mcc
  • 305 Hypertension without mcc

Convert I10 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Code annotations containing back-references to I10:

Diagnosis Index entries containing back-references to I10:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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