2025 ICD-10-CM Diagnosis Code I45.10

by

Unspecified right bundle-branch block

  • I45.10 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 I45.10 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of I45.10 – other international versions of ICD-10 I45.10 may differ.

ICD-10-CM Coding Rules

  • I45.10 is not usually sufficient justification for admission to an acute care hospital when used a principal diagnosis.

Applicable To

  • Right bundle-branch block NOS

The following code(s) above I45.10 contain annotation back-references

 that may be applicable to I45.10:

  • I00-I99  Diseases of the circulatory system

Approximate Synonyms

  • Brugada syndrome
  • Right bundle branch block

Clinical Information

  • A cardiac rhythm characterized by a qrs duration of 120 ms, rsr’ or rsr’ complexes in v1 and v2, delayed onset of intrinsicoid, deflection in v1 and v2 >50 ms, broad, slurred s wave in 1, v5, and v6.
  • An impairment of transmission of the cardiac electrical impulse along the fibers of the right bundle branch. A “complete rbbb pattern” (with qrs duration > 0.11s) does not necessarily reflect the existence of a total conduction block in the right branch. This pattern only indicates that the entire or major parts of both ventricles are activated by the impulse emerging from the left branch. Thus, a significant degree of conduction delay (“high-grade” or “incomplete rbbb”) can produce a similar pattern.

ICD-10-CM I45.10 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 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

Convert I45.10 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

Diagnosis Index entries containing back-references to I45.10:

  • Block, blocked
    • bundle-branch (complete) (false) (incomplete) I45.4
      • right I45.10
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