2022 ICD-10-CM Diagnosis Code I43

Cardiomyopathy in diseases classified elsewhere

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Manifestation Code
  • I43 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 I43 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of I43 - other international versions of ICD-10 I43 may differ.
ICD-10-CM Coding Rules
  • I43 describes the manifestation of an underlying disease, not the disease itself.
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • underlying disease, such as:
  • amyloidosis (
    ICD-10-CM Diagnosis Code E85
    • E85 Amyloidosis
      • E85.0 Non-neuropathic heredofamilial amyloidosis
      • E85.1 Neuropathic heredofamilial amyloidosis
      • E85.2 Heredofamilial amyloidosis, unspecified
      • E85.3 Secondary systemic amyloidosis
      • E85.4 Organ-limited amyloidosis
      • E85.8 Other amyloidosis
        • E85.81 Light chain (AL) amyloidosis
        • E85.82 Wild-type transthyretin-related (ATTR) amyloi...
        • E85.89 Other amyloidosis
      • E85.9 Amyloidosis, unspecified
    E85.-
    )
  • glycogen storage disease (
    ICD-10-CM Diagnosis Code E74.0

    Glycogen storage disease

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    E74.0
    )
  • gout (
    ICD-10-CM Diagnosis Code M10.0

    Idiopathic gout

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Applicable To
    • Gouty bursitis
    • Primary gout
    M10.0-
    )
  • thyrotoxicosis (
    ICD-10-CM Diagnosis Code E05.0

    Thyrotoxicosis with diffuse goiter

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Applicable To
    • Exophthalmic or toxic goiter NOS
    • Graves' disease
    • Toxic diffuse goiter
    E05.0-
    ICD-10-CM Diagnosis Code E05.9

    Thyrotoxicosis, unspecified

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Applicable To
    • Hyperthyroidism NOS
    E05.9-
    )
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 I43. 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.
  • cardiomyopathy (in):
  • coxsackie (virus) (
    ICD-10-CM Diagnosis Code B33.24

    Viral cardiomyopathy

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    B33.24
    )
  • diphtheria (
    ICD-10-CM Diagnosis Code A36.81

    Diphtheritic cardiomyopathy

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Diphtheritic myocarditis
    A36.81
    )
  • sarcoidosis (
    ICD-10-CM Diagnosis Code D86.85

    Sarcoid myocarditis

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    D86.85
    )
  • tuberculosis (
    ICD-10-CM Diagnosis Code A18.84

    Tuberculosis of heart

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Tuberculous cardiomyopathy
    • Tuberculous endocarditis
    • Tuberculous myocarditis
    • Tuberculous pericarditis
    A18.84
    )
The following code(s) above I43 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 I43:
  • 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
Approximate Synonyms
  • Cardiac amyloidosis
  • Cardiomyopathy, metabolic
  • Dilated cardiomyopathy associated with connective tissue disorder
  • Dilated cardiomyopathy due to connective tissue di
  • Dilated cardiomyopathy due to dermatomyositis
  • Dilated cardiomyopathy secondary to dermatomyositis
  • Dilated cardiomyopathy secondary to malignancy
  • Dilated cardiomyopathy, due to malignancy
  • Metabolic cardiomyopathy
  • Restrictive cardiomyopathy secondary to malignancy
  • Restrictive cardiomyopathy, due to malignancy
  • Senile cardiac amyloidosis
ICD-10-CM I43 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 314 Other circulatory system diagnoses with mcc
  • 315 Other circulatory system diagnoses with cc
  • 316 Other circulatory system diagnoses without cc/mcc
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems

Convert I43 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 I43:
  • Use Additional: M1A
    , M10
    ICD-10-CM Diagnosis Code M1A

    Chronic gout

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    Use Additional
    • code to identify:
    • Autonomic neuropathy in diseases classified elsewhere (G99.0)
    • Calculus of urinary tract in diseases classified elsewhere (N22)
    • Cardiomyopathy in diseases classified elsewhere (I43)
    • Disorders of external ear in diseases classified elsewhere (H61.1-, H62.8-)
    • Disorders of iris and ciliary body in diseases classified elsewhere (H22)
    • Glomerular disorders in diseases classified elsewhere (N08)
    ICD-10-CM Diagnosis Code M10

    Gout

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Applicable To
    • Acute gout
    • Gout attack
    • Gout flare
    • Podagra
    Type 2 Excludes
    Use Additional
    • code to identify:
    • Autonomic neuropathy in diseases classified elsewhere (G99.0)
    • Calculus of urinary tract in diseases classified elsewhere (N22)
    • Cardiomyopathy in diseases classified elsewhere (I43)
    • Disorders of external ear in diseases classified elsewhere (H61.1-, H62.8-)
    • Disorders of iris and ciliary body in diseases classified elsewhere (H22)
    • Glomerular disorders in diseases classified elsewhere (N08)
ICD-10-CM Codes Adjacent To I43
I42.0 Dilated cardiomyopathy
I42.1 Obstructive hypertrophic cardiomyopathy
I42.2 Other hypertrophic cardiomyopathy
I42.3 Endomyocardial (eosinophilic) disease
I42.4 Endocardial fibroelastosis
I42.5 Other restrictive cardiomyopathy
I42.6 Alcoholic cardiomyopathy
I42.7 Cardiomyopathy due to drug and external agent
I42.8 Other cardiomyopathies
I42.9 Cardiomyopathy, unspecified
I43 Cardiomyopathy in diseases classified elsewhere
I44 Atrioventricular and left bundle-branch block
I44.0 Atrioventricular block, first degree
I44.1 Atrioventricular block, second degree
I44.2 Atrioventricular block, complete
I44.3 Other and unspecified atrioventricular block
I44.30 Unspecified atrioventricular block
I44.39 Other atrioventricular block
I44.4 Left anterior fascicular block
I44.5 Left posterior fascicular block
I44.6 Other and unspecified fascicular block

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