2020 ICD-10-CM Diagnosis Code I23.6

Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction

    2016 2017 2018 2019 2020 Billable/Specific Code Adult Dx (15-124 years)
  • I23.6 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Thombos of atrium/auric append/ventr as current comp fol AMI
  • The 2020 edition of ICD-10-CM I23.6 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of I23.6 - other international versions of ICD-10 I23.6 may differ.
ICD-10-CM Coding Rules
  • I23.6 is applicable to adult patients aged 15 - 124 years inclusive.
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 I23.6. 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.
  • thrombosis of atrium, auricular appendage, and ventricle not specified as current complication following acute myocardial infarction (
    ICD-10-CM Diagnosis Code I51.3

    Intracardiac thrombosis, not elsewhere classified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Apical thrombosis (old)
    • Atrial thrombosis (old)
    • Auricular thrombosis (old)
    • Mural thrombosis (old)
    • Ventricular thrombosis (old)
    Type 1 Excludes
    • intracardiac thrombosis as current complication following acute myocardial infarction (I23.6)
    I51.3
    )
The following code(s) above I23.6 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 I23.6:
  • 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
Approximate Synonyms
  • Left ventricular mural thrombus post acute heart attack
  • Mural thrombus of heart, following heart attack
  • Mural thrombus of heart, following mi
  • Mural thrombus of left ventricle following acute myocardial infarction
  • Post-infarction mural thrombus
ICD-10-CM I23.6 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 314 Other circulatory system diagnoses with mcc
  • 315 Other circulatory system diagnoses with cc
  • 316 Other circulatory system diagnoses without cc/mcc

Convert I23.6 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
Code annotations containing back-references to I23.6:
  • Type 1 Excludes: I51.3
    ICD-10-CM Diagnosis Code I51.3

    Intracardiac thrombosis, not elsewhere classified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Apical thrombosis (old)
    • Atrial thrombosis (old)
    • Auricular thrombosis (old)
    • Mural thrombosis (old)
    • Ventricular thrombosis (old)
    Type 1 Excludes
    • intracardiac thrombosis as current complication following acute myocardial infarction (I23.6)

Diagnosis Index entries containing back-references to I23.6:

ICD-10-CM Codes Adjacent To I23.6
I22.2 Subsequent non-ST elevation (NSTEMI) myocardial infarction
I22.8 Subsequent ST elevation (STEMI) myocardial infarction of other sites
I22.9 Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
I23 Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)
I23.0 Hemopericardium as current complication following acute myocardial infarction
I23.1 Atrial septal defect as current complication following acute myocardial infarction
I23.2 Ventricular septal defect as current complication following acute myocardial infarction
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

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