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I51

I51: Complications and ill-defined descriptions of heart disease

Non-billable headerICD-10-CM

I51 is a non-billable header ICD-10-CM code for complications and ill-defined descriptions of heart disease. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • heart disease specified as rheumatic (I00-I09)

Other codes that can never be billed with I51

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

  • I09.0Rheumatic myocarditis
  • I23.1Atrial septal defect as current complication following acute myocardial infarction
  • I23.2Ventricular septal defect as current complication following acute myocardial infarction
  • I23.4Rupture of chordae tendineae as current complication following acute myocardial infarction
  • I23.5Rupture of papillary muscle as current complication following acute myocardial infarction
  • I23.6Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
  • Q21Congenital malformations of cardiac septa

Risk adjustment

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

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead I51

9 child codes. Green means billable.

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.