2025 ICD-10-CM Diagnosis Code I51.89

Other ill-defined heart diseases

• I51.89 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 I51.89 became effective on October 1, 2024.
• This is the American ICD-10-CM version of I51.89 – other international versions of ICD-10 I51.89 may differ.

Applicable To

• Carditis (acute)(chronic)
• Pancarditis (acute)(chronic)

The following code(s) above I51.89 contain annotation back-references

 that may be applicable to I51.89:

• I00-I99  Diseases of the circulatory system
• I51  Complications and ill-defined descriptions of heart disease

Approximate Synonyms

• Abscess of heart
• Heart disease due to ionizing radiation
• Papillary muscle disorder
• Radiation heart disease due to radiation treatment

ICD-10-CM I51.89 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

• 302 Atherosclerosis with mcc
• 303 Atherosclerosis without mcc

Convert I51.89 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

Code annotations containing back-references to I51.89:

• Includes: I11

Diagnosis Index entries containing back-references to I51.89:

• Asynergia, asynergyR27.8
  • ventricular I51.89
• Carditis (acute) (bacterial) (chronic) (subacute) I51.89
• Disease, diseased – see also Syndrome
  • heart (organic) I51.9
    • functional I51.89
• Disorder (of) – see also Disease
  • cardiac, functional I51.89
• Displacement, displaced
  • heart (congenital) Q24.8
    • acquired I51.89
• Dysfunction
  • heart I51.89
  • papillary muscle I51.89
• Hemorrhage, hemorrhagic (concealed) R58
  • heart I51.89
• Hyperkinesia, hyperkinetic (disease) (reaction) (syndrome) (childhood) (adolescence) – see also Disorder, attention-deficit hyperactivity
  • heart I51.89
• Incompetency, incompetent, incompetence
  • chronotropicI45.89
    • with
      • left ventricular dysfunction I51.89
• Pancarditis (acute) (chronic) I51.89