1. ICD-10-CM Codes
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2. I00-I99
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3. I30-I5A
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4. I45-
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5. 2023 ICD-10-CM Diagnosis Code I45.81

2023 ICD-10-CM Diagnosis Code I45.81

Long QT syndrome

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• I45.81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM I45.81 became effective on October 1, 2022.
• This is the American ICD-10-CM version of I45.81 - other international versions of ICD-10 I45.81 may differ.

• Acquired long qt syndrome
• Acquired long qt syndrome (heart)
• Congenital long qt syndrome
• Congenital long qt syndrome (at birth)
• Prolonged qt interval syndrome
• Torsades de pointes
• Torsades type ventricular tachycardia

• A condition that is characterized by episodes of fainting (syncope) and varying degree of ventricular arrhythmia as indicated by the prolonged qt interval. The inherited forms are caused by mutation of genes encoding cardiac ion channel proteins. The two major forms are romano-ward syndrome and jervell-lange nielsen syndrome.
• A ventricular arrhythmia characterized by syncopal episodes and a long qt interval, sometimes leading to sudden death due to paroxysmal ventricular arrhythmia. This arrhythmia is associated with a prolongation of repolarization following depolarization of the cardiac ventricles. The prolongation of the q-t interval combined with torsades de pointes manifests as several different forms; some may be acquired or congenital; some may lead to serious arrhythmia and sudden cardiac death.
• Prolongation of q-t interval combined with torsades de pointes and manifests as several different forms; may be acquired or congenital; may lead to serious arrhythmia and sudden cardiac death.

• 308 Cardiac arrhythmia and conduction disorders with mcc
• 309 Cardiac arrhythmia and conduction disorders with cc
• 310 Cardiac arrhythmia and conduction disorders without cc/mcc

Convert I45.81 to ICD-9-CM

• 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

• Code Also: I47.21
  ICD-10-CM Diagnosis Code I47.21

  Torsades de pointes

  2023 - New Code Billable/Specific Code

  Code Also

  • , if applicable, long QT syndrome (I45.81)

  Use Additional

  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
• Type 1 Excludes: R94.31
  ICD-10-CM Diagnosis Code R94.31

  Abnormal electrocardiogram [ECG] [EKG]

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Type 1 Excludes

  • long QT syndrome (I45.81)

• Jervell-Lange-Nielsen syndrome I45.81
• Long
  • QT syndrome I45.81
• Romano-Ward I45.81 (prolonged QT interval)
• Syndrome - see also Disease
  • Jervell-Lange-Nielsen I45.81
  • long QT I45.81
  • QT interval prolongation I45.81
  • Romano-Ward I45.81 (prolonged QT interval)

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