ICD-10-CM 2027
ICD-10 code for cardiac hypertrophy
From the official ICD-10-CM alphabetic index entry “Hypertrophy, hypertrophic › cardiac (chronic) (idiopathic)”. Page updated September 29, 2026.
About coding cardiac hypertrophy
The ICD-10-CM code for cardiac hypertrophy is I51.7 (Cardiomegaly). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I51.7.
Within I51 (complications and ill-defined descriptions of heart disease), I51.7 is specifically for Cardiomegaly. Related codes cover cardiac septal defect, acquired (I51.0), rupture of chordae tendineae, not elsewhere classified (I51.1), rupture of papillary muscle, not elsewhere classified (I51.2), intracardiac thrombosis, not elsewhere classified (I51.3), myocarditis, unspecified (I51.4), myocardial degeneration (I51.5), other ill-defined heart diseases (I51.8) and heart disease, unspecified (I51.9).
Don't report I51.7 together with the conditions in its Excludes1 note: cardiomegaly due to hypertension (I11.-) and cardiomegaly due to hypertension and chronic kidney disease (I13.-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific cardiac hypertrophy codes (official index)
- with rheumatic fever (conditions in I00)
- active I01.8 — Other acute rheumatic heart disease
- inactive or quiescent (with chorea) I09.89 — Other specified rheumatic heart diseases
- congenital NEC Q24.8 — Other specified congenital malformations of heart
- fatty
- hypertensive
- rheumatic (with chorea) I09.89 — Other specified rheumatic heart diseases
- active or acute I01.8 — Other acute rheumatic heart disease
- with chorea I02.0 — Rheumatic chorea with heart involvement
- valve
Don't confuse with (Excludes1 for I51.7)
Common questions about cardiac hypertrophy ICD-10 codes
What is the ICD-10 code for cardiac hypertrophy?
- I51.7 — Cardiomegaly. More specific codes apply when the documentation supports them: I01.8, I09.89, Q24.8, I09.89 and others below.
What is the ICD-10 code for congenital nec cardiac hypertrophy?
- Q24.8 — Other specified congenital malformations of heart.
What is the ICD-10 code for rheumatic cardiac hypertrophy?
- I09.89 — Other specified rheumatic heart diseases.
Is I51.7 billable?
- Yes. I51.7 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I51.7 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I51.7 as a principal diagnosis.
Is I51.7 a CC or MCC?
- No. I51.7 is neither a CC nor an MCC under MS-DRG v44.0.