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Q23Non-billableSave

Q23 - Congenital malformations of aortic and mitral valves

ICD-10-CM Chapter 17: Congenital malformations, deformations and chromosomal abnormalities · Q20-Q28 Congenital malformations of the circulatory system (Q20-Q28) · Top-level category · FY2027

Coding Guidance

Q23 is a non-billable heading. Report one of the 7 more specific codes below.

Includes, Excludes and Coding Notes

Excludes 2 — Not Included HereFrom Chapter Q00-Q99

Not part of this code; report both codes when the patient has both conditions.

  • inborn errors of metabolism (E70-E88)
NotesFrom Chapter Q00-Q99

Instructional notes from the ICD-10-CM tabular list.

  • Codes from this chapter are not for use on maternal records

More Specific Codes (7)

Q23.0Congenital stenosis of aortic valve→Q23.1Congenital insufficiency of aortic valve→Q23.2Congenital mitral stenosis→Q23.3Congenital mitral insufficiency→Q23.4Hypoplastic left heart syndrome→Q23.8Other congenital malformations of aortic and mitral valves→Q23.9Congenital malformation of aortic and mitral valves, unspecified→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with Q23.