2022 ICD-10-CM Diagnosis Code I51.9

Heart disease, unspecified

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • I51.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM I51.9 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of I51.9 - other international versions of ICD-10 I51.9 may differ.
The following code(s) above I51.9 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 I51.9:
  • I00-I99
    2022 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
  • I51
    ICD-10-CM Diagnosis Code I51

    Complications and ill-defined descriptions of heart disease

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Complications and ill-defined descriptions of heart disease
Approximate Synonyms
  • Cardiac disease postpartum
  • Chronic left ventricular systolic dysfunction
  • Chronic systolic dysfunction of left ventricle
  • Diastolic dysfunction
  • Diastolic dysfunction (heart condition)
  • Diastolic dysfunction, left ventricle
  • Heart disease during pregnancy
  • Heart disease in childbirth
  • Heart disease in pregnancy
  • Left ventricular diastolic dysfunction
  • Left ventricular systolic dysfunction
  • Postpartum (after childbirth) heart disease
  • Right ventricular systolic dysfunction
  • Right ventricular systolic dysfunction without heart failure
  • Systolic dysfunction, left ventricle
Clinical Information
  • Any deviation from the normal structure or function of the cardiac system that is manifested by a characteristic set of symptoms and signs.
  • If you're like most people, you think that heart disease is a problem for other folks. But heart disease is the number one killer in the United States It is also a major cause of disability. There are many different forms of heart disease. The most common cause of heart disease is narrowing or blockage of the coronary arteries, the blood vessels that supply blood to the heart itself. This is called coronary artery disease and happens slowly over time. It's the major reason people have heart attacks. Other kinds of heart problems may happen to the valves in the heart, or the heart may not pump well and cause heart failure. Some people are born with heart disease. You can help reduce your risk of heart disease by taking steps to control factors that put you at greater risk:
    • control your blood pressure
    • lower your cholesterol
    • don't smoke
    • get enough exercise
  • Impairment of health or a condition of abnormal functioning of the heart.
  • Pathological conditions involving the heart including its structural and functional abnormalities.
ICD-10-CM I51.9 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 302 Atherosclerosis with mcc
  • 303 Atherosclerosis without mcc

Convert I51.9 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
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
Code annotations containing back-references to I51.9:
  • Type 1 Excludes: I51
    , I51
    ICD-10-CM Diagnosis Code I51

    Complications and ill-defined descriptions of heart disease

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
    ICD-10-CM Diagnosis Code I51

    Complications and ill-defined descriptions of heart disease

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
  • Includes: I11
    ICD-10-CM Diagnosis Code I11

    Hypertensive heart disease

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Includes

Diagnosis Index entries containing back-references to I51.9:

ICD-10-CM Codes Adjacent To I51.9
I51.0 Cardiac septal defect, acquired
I51.1 Rupture of chordae tendineae, not elsewhere classified
I51.2 Rupture of papillary muscle, not elsewhere classified
I51.3 Intracardiac thrombosis, not elsewhere classified
I51.4 Myocarditis, unspecified
I51.5 Myocardial degeneration
I51.7 Cardiomegaly
I51.8 Other ill-defined heart diseases
I51.81 Takotsubo syndrome
I51.89 Other ill-defined heart diseases
I51.9 Heart disease, unspecified
I52 Other heart disorders in diseases classified elsewhere
I5A Non-ischemic myocardial injury (non-traumatic)
I60 Nontraumatic subarachnoid hemorrhage
I60.0 Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation
I60.00 Nontraumatic subarachnoid hemorrhage from unspecified carotid siphon and bifurcation
I60.01 Nontraumatic subarachnoid hemorrhage from right carotid siphon and bifurcation
I60.02 Nontraumatic subarachnoid hemorrhage from left carotid siphon and bifurcation
I60.1 Nontraumatic subarachnoid hemorrhage from middle cerebral artery
I60.10 Nontraumatic subarachnoid hemorrhage from unspecified middle cerebral artery
I60.11 Nontraumatic subarachnoid hemorrhage from right middle cerebral artery

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