2017/18 ICD-10-CM Diagnosis Code I41

Myocarditis in diseases classified elsewhere

ICD-10-CM Coding Rules
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:
  • typhus (
    ICD-10-CM Diagnosis Code A75.0

    Epidemic louse-borne typhus fever due to Rickettsia prowazekii

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Classical typhus (fever)
    • Epidemic (louse-borne) typhus
    A75.0-
    ICD-10-CM Diagnosis Code A75.9

    Typhus fever, unspecified

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Typhus (fever) NOS
    A75.9
    )
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 I41. 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.
  • myocarditis (in):
  • Chagas' disease (chronic) (
    ICD-10-CM Diagnosis Code B57.2

    Chagas' disease (chronic) with heart involvement

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • American trypanosomiasis NOS
    • Chagas' disease (chronic) NOS
    • Chagas' disease (chronic) with myocarditis
    • Trypanosomiasis NOS
    B57.2
    )
  • acute (
    ICD-10-CM Diagnosis Code B57.0

    Acute Chagas' disease with heart involvement

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Acute Chagas' disease with myocarditis
    B57.0
    )
  • coxsackie (virus) infection (
    ICD-10-CM Diagnosis Code B33.22

    Viral myocarditis

      2016 2017 2018 Billable/Specific Code
    B33.22
    )
  • diphtheritic (
    ICD-10-CM Diagnosis Code A36.81

    Diphtheritic cardiomyopathy

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Diphtheritic myocarditis
    A36.81
    )
  • gonococcal (
    ICD-10-CM Diagnosis Code A54.83

    Gonococcal heart infection

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Gonococcal endocarditis
    • Gonococcal myocarditis
    • Gonococcal pericarditis
    A54.83
    )
  • influenzal (
    ICD-10-CM Diagnosis Code J09.X9

    Influenza due to identified novel influenza A virus with other manifestations

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Influenza due to identified novel influenza A virus with encephalopathy
    • Influenza due to identified novel influenza A virus with myocarditis
    • Influenza due to identified novel influenza A virus with otitis media
    Use Additional
    • code to identify manifestation
    J09.X9
    ,
    ICD-10-CM Diagnosis Code J10.82

    Influenza due to other identified influenza virus with myocarditis

      2016 2017 2018 Billable/Specific Code
    J10.82
    ,
    ICD-10-CM Diagnosis Code J11.82

    Influenza due to unidentified influenza virus with myocarditis

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Influenzal myocarditis NOS
    J11.82
    )
  • meningococcal (
    ICD-10-CM Diagnosis Code A39.52

    Meningococcal myocarditis

      2016 2017 2018 Billable/Specific Code
    A39.52
    )
  • mumps (
    ICD-10-CM Diagnosis Code B26.82

    Mumps myocarditis

      2016 2017 2018 Billable/Specific Code
    B26.82
    )
  • rheumatoid arthritis (
    ICD-10-CM Diagnosis Code M05.31

    Rheumatoid heart disease with rheumatoid arthritis of shoulder

      2016 2017 2018 Non-Billable/Non-Specific Code
    M05.31
    )
  • sarcoid (
    ICD-10-CM Diagnosis Code D86.85

    Sarcoid myocarditis

      2016 2017 2018 Billable/Specific Code
    D86.85
    )
  • syphilis (
    ICD-10-CM Diagnosis Code A52.06

    Other syphilitic heart involvement

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Syphilitic coronary artery disease
    • Syphilitic myocarditis
    • Syphilitic pericarditis
    A52.06
    )
  • toxoplasmosis (
    ICD-10-CM Diagnosis Code B58.81

    Toxoplasma myocarditis

      2016 2017 2018 Billable/Specific Code
    B58.81
    )
  • tuberculous (
    ICD-10-CM Diagnosis Code A18.84

    Tuberculosis of heart

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Tuberculous cardiomyopathy
    • Tuberculous endocarditis
    • Tuberculous myocarditis
    • Tuberculous pericarditis
    A18.84
    )
The following code(s) above I41 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 I41:
  • I00-I99
    2018 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
ICD-10-CM I41 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert I41 to ICD-9-CM

Code History
ICD-10-CM Codes Adjacent To I41
I37.2 Nonrheumatic pulmonary valve stenosis with insufficiency
I37.8 Other nonrheumatic pulmonary valve disorders
I37.9 Nonrheumatic pulmonary valve disorder, unspecified
I38 Endocarditis, valve unspecified
I39 Endocarditis and heart valve disorders in diseases classified elsewhere
I40 Acute myocarditis
I40.0 Infective myocarditis
I40.1 Isolated myocarditis
I40.8 Other acute myocarditis
I40.9 Acute myocarditis, unspecified
I41 Myocarditis in diseases classified elsewhere
I42 Cardiomyopathy
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

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