2021

  1. ICD-10-CM Codes
    2. ›
  2. Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
    3. ›
  3. Q20-Q28 Congenital malformations of the circulatory system
    4. ›
  4. Q23- Congenital malformations of aortic and mitral valves
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code Q23.0

2021 ICD-10-CM Diagnosis Code Q23.0

Congenital stenosis of aortic valve

    2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
  • Q23.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM Q23.0 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of Q23.0 - other international versions of ICD-10 Q23.0 may differ.
Applicable To
  • Congenital aortic atresia
  • Congenital aortic stenosis NOS
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 Q23.0. 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.
  • congenital stenosis of aortic valve in hypoplastic left heart syndrome (
    ICD-10-CM Diagnosis Code Q23.4

    Hypoplastic left heart syndrome

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Q23.4
    )
  • congenital subaortic stenosis (
    ICD-10-CM Diagnosis Code Q24.4

    Congenital subaortic stenosis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Q24.4
    )
  • supravalvular aortic stenosis (congenital) (
    ICD-10-CM Diagnosis Code Q25.3

    Supravalvular aortic stenosis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Type 1 Excludes
    • congenital aortic stenosis NOS (Q23.0)
    • congenital stenosis of aortic valve (Q23.0)
    Q25.3
    )
The following code(s) above Q23.0 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 Q23.0:
  • Q00-Q99
    2021 ICD-10-CM Range Q00-Q99

    Congenital malformations, deformations and chromosomal abnormalities

    Note
    • Codes from this chapter are not for use on maternal records
    Type 2 Excludes
    • inborn errors of metabolism (E70-E88)
    Congenital malformations, deformations and chromosomal abnormalities
Approximate Synonyms
  • Aortic valve atresia, congenital
  • Congenital aortic valve atresia (at birth)
  • Congenital aortic valve stenosis (at birth)
  • Congenital atresia of aortic valve
  • Stenosis (narrowing) of aortic valve, congenital
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • Q23.0 is considered exempt from POA reporting.
ICD-10-CM Q23.0 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 306 Cardiac congenital and valvular disorders with mcc
  • 307 Cardiac congenital and valvular disorders without mcc

Convert Q23.0 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
Code annotations containing back-references to Q23.0:
  • Type 1 Excludes: Q25.3
    , Q25.3
    , I35
    ICD-10-CM Diagnosis Code Q25.3

    Supravalvular aortic stenosis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Type 1 Excludes
    • congenital aortic stenosis NOS (Q23.0)
    • congenital stenosis of aortic valve (Q23.0)
    ICD-10-CM Diagnosis Code Q25.3

    Supravalvular aortic stenosis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Type 1 Excludes
    • congenital aortic stenosis NOS (Q23.0)
    • congenital stenosis of aortic valve (Q23.0)
    ICD-10-CM Diagnosis Code I35

    Nonrheumatic aortic valve disorders

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • aortic valve disorder of unspecified cause but with diseases of mitral and/or tricuspid valve(s) (I08.-)
    • aortic valve disorder specified as congenital (Q23.0, Q23.1)
    • aortic valve disorder specified as rheumatic (I06.-)
    • hypertrophic subaortic stenosis (I42.1)

Diagnosis Index entries containing back-references to Q23.0:
  • Anomaly, anomalous (congenital) (unspecified type) Q89.9
    ICD-10-CM Diagnosis Code Q89.9

    Congenital malformation, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Applicable To
    • Congenital anomaly NOS
    • Congenital deformity NOS
    • heart Q24.9
      ICD-10-CM Diagnosis Code Q24.9

      Congenital malformation of heart, unspecified

        2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      Applicable To
      • Congenital anomaly of heart
      • Congenital disease of heart
      • valve NEC Q24.8
        ICD-10-CM Diagnosis Code Q24.8

        Other specified congenital malformations of heart

          2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
        Applicable To
        • Congenital diverticulum of left ventricle
        • Congenital malformation of myocardium
        • Congenital malformation of pericardium
        • Malposition of heart
        • Uhl's disease
  • Atresia, atretic
    • aortic (orifice) (valve) Q23.0
  • Stenosis, stenotic (cicatricial) - see also Stricture
    • aortic (valve) I35.0
      ICD-10-CM Diagnosis Code I35.0

      Nonrheumatic aortic (valve) stenosis

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      • congenital Q23.0
    • heart valve (congenital) Q24.8
      ICD-10-CM Diagnosis Code Q24.8

      Other specified congenital malformations of heart

        2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      Applicable To
      • Congenital diverticulum of left ventricle
      • Congenital malformation of myocardium
      • Congenital malformation of pericardium
      • Malposition of heart
      • Uhl's disease
      • aortic Q23.0
    • valve (cardiac) (heart) I38
      - see also Endocarditis
      ICD-10-CM Diagnosis Code I38

      Endocarditis, valve unspecified

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Includes
      • endocarditis (chronic) NOS
      • valvular incompetence NOS
      • valvular insufficiency NOS
      • valvular regurgitation NOS
      • valvular stenosis NOS
      • valvulitis (chronic) NOS
      Type 1 Excludes
      • congenital insufficiency of cardiac valve NOS (Q24.8)
      • congenital stenosis of cardiac valve NOS (Q24.8)
      • endocardial fibroelastosis (I42.4)
      • endocarditis specified as rheumatic (I09.1)
      • congenital Q24.8
        ICD-10-CM Diagnosis Code Q24.8

        Other specified congenital malformations of heart

          2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
        Applicable To
        • Congenital diverticulum of left ventricle
        • Congenital malformation of myocardium
        • Congenital malformation of pericardium
        • Malposition of heart
        • Uhl's disease
        • aortic Q23.0
  • Stricture - see also Stenosis
    • heart - see also Disease, heart
      • valve I38
        - see also Endocarditis
        ICD-10-CM Diagnosis Code I38

        Endocarditis, valve unspecified

          2016 2017 2018 2019 2020 2021 Billable/Specific Code
        Includes
        • endocarditis (chronic) NOS
        • valvular incompetence NOS
        • valvular insufficiency NOS
        • valvular regurgitation NOS
        • valvular stenosis NOS
        • valvulitis (chronic) NOS
        Type 1 Excludes
        • congenital insufficiency of cardiac valve NOS (Q24.8)
        • congenital stenosis of cardiac valve NOS (Q24.8)
        • endocardial fibroelastosis (I42.4)
        • endocarditis specified as rheumatic (I09.1)
        • aortic Q23.0
    • valve (cardiac) (heart) - see also Endocarditis

ICD-10-CM Codes Adjacent To Q23.0
Q22.0 Pulmonary valve atresia
Q22.1 Congenital pulmonary valve stenosis
Q22.2 Congenital pulmonary valve insufficiency
Q22.3 Other congenital malformations of pulmonary valve
Q22.4 Congenital tricuspid stenosis
Q22.5 Ebstein's anomaly
Q22.6 Hypoplastic right heart syndrome
Q22.8 Other congenital malformations of tricuspid valve
Q22.9 Congenital malformation of tricuspid valve, unspecified
Q23 Congenital malformations of aortic and mitral valves
Q23.0 Congenital stenosis of aortic valve
Q23.1 Congenital insufficiency of aortic valve
Q23.2 Congenital mitral stenosis
Q23.3 Congenital mitral insufficiency
Q23.4 Hypoplastic left heart syndrome
Q23.8 Other congenital malformations of aortic and mitral valves
Q23.9 Congenital malformation of aortic and mitral valves, unspecified
Q24 Other congenital malformations of heart
Q24.0 Dextrocardia
Q24.1 Levocardia
Q24.2 Cor triatriatum

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

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