All ICD10 Codes

Q23

Non-Billable
ChapterQ00–Q99
Rankcategory
Official Description

Congenital malformations of aortic and mitral valves

Use a more specific code (6 billable, 1 non-billable)
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 valveshas subcodesQ23.9Congenital malformation of aortic and mitral valves, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

CH17 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)

Clinical Hierarchy

BillableHas subcodes
CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
Q20-Q28Congenital malformations of the circulatory system (Q20-Q28)
Q23Congenital malformations of aortic and mitral valvesNot billable
Q23.0Congenital stenosis of aortic valveBillable
Q23.1Congenital insufficiency of aortic valveBillable
Q23.2Congenital mitral stenosisBillable
Q23.3Congenital mitral insufficiencyBillable
Q23.4Hypoplastic left heart syndromeBillable
Q23.8Other congenital malformations of aortic and mitral valvesSubcodes
Q23.9Congenital malformation of aortic and mitral valves, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q23:

chapterCH17
Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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