2019 ICD-10-CM Diagnosis Code I45.2

Bifascicular block

    2016 2017 2018 2019 Billable/Specific Code
  • I45.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM I45.2 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of I45.2 - other international versions of ICD-10 I45.2 may differ.
The following code(s) above I45.2 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to I45.2:
  • I00-I99
    2019 ICD-10-CM Range I00-I99

    Diseases of the circulatory system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    • systemic connective tissue disorders (M30-M36)
    • transient cerebral ischemic attacks and related syndromes (G45.-)
    Diseases of the circulatory system
Approximate Synonyms
  • Bilateral bundle branch block
  • Bilateral bundle branch block (heart rhythm condition)
  • Heart block
  • Right bundle branch block and left anterior fascicular
  • Right bundle branch block and left anterior fascicular block
  • Right bundle branch block and left posterior fascicular block
Clinical Information
  • An electrocardiographic finding comprising right bundle branch block and left anterior fascicular block, or right bundle branch block and left posterior fascicular block. Defects occuring in two of the three divisions of the conduction system of the heart are considered bifascicular blocks. Technically left bundle branch block may be considered a bifascicular block.
ICD-10-CM I45.2 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 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
  • 793 Full term neonate with major problems

Convert I45.2 to ICD-9-CM

Code 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

Diagnosis Index entries containing back-references to I45.2:
  • Block, blocked
    • bundle-branch (complete) (false) (incomplete) I45.4
      ICD-10-CM Diagnosis Code I45.4

      Nonspecific intraventricular block

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Bundle-branch block NOS
      • left I44.7
        ICD-10-CM Diagnosis Code I44.7

        Left bundle-branch block, unspecified

          2016 2017 2018 2019 Billable/Specific Code Questionable As Admission Dx
        • incomplete I44.7
          ICD-10-CM Diagnosis Code I44.7

          Left bundle-branch block, unspecified

            2016 2017 2018 2019 Billable/Specific Code Questionable As Admission Dx
          • with right bundle branch block I45.2
        • with right bundle branch block I45.2
      • right I45.10
        ICD-10-CM Diagnosis Code I45.10

        Unspecified right bundle-branch block

          2016 2017 2018 2019 Billable/Specific Code Questionable As Admission Dx
        Applicable To
        • Right bundle-branch block NOS
        • with
          • left bundle branch block I45.2
          • left fascicular block I45.2
      • bilateral I45.2
    • heart I45.9
      ICD-10-CM Diagnosis Code I45.9

      Conduction disorder, unspecified

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Heart block NOS
      • Stokes-Adams syndrome
      • bundle branch I45.4
        ICD-10-CM Diagnosis Code I45.4

        Nonspecific intraventricular block

          2016 2017 2018 2019 Billable/Specific Code
        Applicable To
        • Bundle-branch block NOS
        • bilateral I45.2
    • intraventricular (nonspecific) I45.4
      ICD-10-CM Diagnosis Code I45.4

      Nonspecific intraventricular block

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Bundle-branch block NOS
    • bifascicular I45.2 (cardiac)

ICD-10-CM Codes Adjacent To I45.2
I44.5 Left posterior fascicular block
I44.6 Other and unspecified fascicular block
I44.60 Unspecified fascicular block
I44.69 Other fascicular block
I44.7 Left bundle-branch block, unspecified
I45 Other conduction disorders
I45.0 Right fascicular block
I45.1 Other and unspecified right bundle-branch block
I45.10 Unspecified right bundle-branch block
I45.19 Other right bundle-branch block
I45.2 Bifascicular block
I45.3 Trifascicular block
I45.4 Nonspecific intraventricular block
I45.5 Other specified heart block
I45.6 Pre-excitation syndrome
I45.8 Other specified conduction disorders
I45.81 Long QT syndrome
I45.89 Other specified conduction disorders
I45.9 Conduction disorder, unspecified
I46 Cardiac arrest
I46.2 Cardiac arrest due to underlying cardiac condition

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