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ICD-10-CM Codes
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Q00-Q99
Congenital malformations, deformations and chromosomal abnormalities
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Q20-Q28
Congenital malformations of the circulatory system
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Q23-
Congenital malformations of aortic and mitral valves
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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 ExcludesType 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:
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 AdmissionPOA 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:
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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)
- 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
- 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
- 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
- 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)
- 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
Q22.6 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
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.