MCMedicalCodingSoftware
Q23.2

Q23.2: Congenital mitral stenosis

Billable / specific codeICD-10-CMPOA exempt

Q23.2 is a billable, specific ICD-10-CM code for congenital mitral stenosis. It is valid for submission on a claim.

Check Q23.2 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Congenital mitral atresia

Other codes that can never be billed with Q23.2

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • I34Nonrheumatic mitral valve disorders

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

Q23.2 is named in 18 Medicare coverage policies: 18 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
  • A52868Billing and Coding: Transesophageal Echocardiography (TEE)
  • A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
  • A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)

Alphabetic index entries that lead here

  • Duroziez's disease(congenital mitral stenosis)
  • Parachute mitral valve
  • Atresia, atretic›mitral valve
  • Disease, diseased›Duroziez's(congenital mitral stenosis)
  • Fusion, fused›commissure, mitral valve
  • Supernumerary›mitral cusps
  • Anomaly, anomalous›mitral›stenosis
  • Deformity›mitral›parachute
  • Deformity›mitral›stenosis, congenital
  • Fusion, fused›cusps, heart valve NEC›mitral
  • Stenosis, stenotic›mitral›congenital
  • Supernumerary›cusps, heart valve NEC›mitral

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Q23

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.