2025 ICD-10-CM Diagnosis Code I49.4

Other and unspecified premature depolarization

  • I49.4 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2025 edition of ICD-10-CM I49.4 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of I49.4 – other international versions of ICD-10 I49.4 may differ.

The following code(s) above I49.4 contain annotation back-references

 that may be applicable to I49.4:

  • I00-I99  Diseases of the circulatory system
  • I49  Other cardiac arrhythmias

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
  • 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
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