2020 ICD-10-CM Diagnosis Code I24.9

Acute ischemic heart disease, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • I24.9 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 I24.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of I24.9 - other international versions of ICD-10 I24.9 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as I24.9. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • ischemic heart disease (chronic) NOS (
    ICD-10-CM Diagnosis Code I25.9

    Chronic ischemic heart disease, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Ischemic heart disease (chronic) NOS
    I25.9
    )
The following code(s) above I24.9 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 I24.9:
  • I00-I99
    2020 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
  • I20-I25
    2020 ICD-10-CM Range I20-I25

    Ischemic heart diseases

    Use Additional
    • code to identify presence of hypertension (I10-I16)
    Ischemic heart diseases
  • I24
    ICD-10-CM Diagnosis Code I24

    Other acute ischemic heart diseases

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • angina pectoris (I20.-)
    • transient myocardial ischemia in newborn (P29.4)
    Other acute ischemic heart diseases
Approximate Synonyms
  • Acute coronary syndrome
ICD-10-CM I24.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 311 Angina pectoris

Convert I24.9 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
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to I24.9:
  • Cyanotic heart disease I24.9
  • Ischemia, ischemic I99.8
    ICD-10-CM Diagnosis Code I99.8

    Other disorder of circulatory system

      2016 2017 2018 2019 2020 Billable/Specific Code
    • heart (chronic or with a stated duration of over 4 weeks) I25.9
      ICD-10-CM Diagnosis Code I25.9

      Chronic ischemic heart disease, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Ischemic heart disease (chronic) NOS
      • acute or with a stated duration of 4 weeks or less I24.9
      • subacute I24.9
  • Syndrome - see also Disease

ICD-10-CM Codes Adjacent To I24.9
I23.3 Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction
I23.4 Rupture of chordae tendineae as current complication following acute myocardial infarction
I23.5 Rupture of papillary muscle as current complication following acute myocardial infarction
I23.6 Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
I23.7 Postinfarction angina
I23.8 Other current complications following acute myocardial infarction
I24 Other acute ischemic heart diseases
I24.0 Acute coronary thrombosis not resulting in myocardial infarction
I24.1 Dressler's syndrome
I24.8 Other forms of acute ischemic heart disease
I24.9 Acute ischemic heart disease, unspecified
I25 Chronic ischemic heart disease
I25.1 Atherosclerotic heart disease of native coronary artery
I25.10 …… without angina pectoris
I25.11 Atherosclerotic heart disease of native coronary artery with angina pectoris
I25.110 Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
I25.111 …… with documented spasm
I25.118 Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris
I25.119 Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris
I25.2 Old myocardial infarction
I25.3 Aneurysm of heart

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