Q23 ICD-10-CM Code: Congenital malformations of aortic and mitral valves
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
Q23Congenital malformations of aortic and mitral valves
ICD-10-CM diagnosis code · United States clinical modification
Where Q23 sits
- 1
Chapter 17
Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- 2
Section
Congenital malformations of the circulatory system (Q20-Q28)
- 3
Category Q23
Congenital malformations of aortic and mitral valves
- 4
Code Q23
Congenital malformations of aortic and mitral valves
Codes under Q23
Q23 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Q23.0Congenital stenosis of aortic valveQ23.1Congenital insufficiency of aortic valveQ23.2Congenital mitral stenosisQ23.3Congenital mitral insufficiencyQ23.4Hypoplastic left heart syndromeQ23.8Other congenital malformations of aortic and mitral valvesQ23.9Congenital malformation of aortic and mitral valves, unspecifiedNotes for this code
Inclusion terms
No inclusion terms are listed for Q23.
Code first
No “code first” instruction is listed for Q23.
Use additional code
No “use additional code” instruction is listed for Q23.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for Q23.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for Q23.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code Q23 mean?
Q23 is the FY 2027 U.S. ICD-10-CM code for “Congenital malformations of aortic and mitral valves.”
Is Q23 a billable or specific ICD-10-CM code?
No. Q23 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is Q23 located in ICD-10-CM?
Q23 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Congenital malformations of the circulatory system (Q20-Q28) (Q20–Q28), under category Q23, Congenital malformations of aortic and mitral valves.
What coding notes are listed for Q23?
No inclusion terms are listed for Q23 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.