Q21.8

ICD-10Billable

Other congenital malformations of cardiac septa

Official ICD-10-CM descriptor (FY2026)

Other congenital malformations of cardiac septa

Q21.8 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

  • Eisenmenger's defect
  • Pentalogy of Fallot

Code also

Two codes may be needed; sequencing depends on the reason for the encounter.

  • , if applicable:
  • Eisenmenger's complex (I27.83)
  • Eisenmenger's syndrome (I27.83)

Related codes in Q21

Where this code sits

Parent code
Q21

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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