1. ICD-10-CM Codes
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2. I00-I99 Diseases of the circulatory system
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3. I30-I52 Other forms of heart disease
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4. I45- Other conduction disorders
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2020 ICD-10-CM Diagnosis Code I45.4

Nonspecific intraventricular block

2016 2017 2018 2019 2020 Billable/Specific Code

• I45.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2020 edition of ICD-10-CM I45.4 became effective on October 1, 2019.
• This is the American ICD-10-CM version of I45.4 - other international versions of ICD-10 I45.4 may differ.

• Bundle branch block
• Diffuse intraventricular block
• Intraventricular block, diffuse

• A form of heart block in which the electrical stimulation of heart ventricles is interrupted at either one of the branches of bundle of his thus preventing the simultaneous depolarization of the two ventricles.
• An electrocardiographic finding defined by prolongation of the qrs complex. It is caused by damage of one of the bundle branches, resulting in the delay or obstruction of the conduction of electrical impulses.

• 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 I45.4 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

• Block, blocked
  • bundle-branch (complete) (false) (incomplete) I45.4
  • heart I45.9
    ICD-10-CM Diagnosis Code I45.9

    Conduction disorder, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code

    Applicable To

    • Heart block NOS
    • Stokes-Adams syndrome
    • bundle branch I45.4
  • intraventricular (nonspecific) I45.4

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