FY2027 ICD-10-CM reference
I42.0: Dilated cardiomyopathy
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Dilated cardiomyopathy. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- I42.00: Dilated cardiomyopathy, unspecifiedBillable code
- I42.01: Familial-genetic dilated cardiomyopathyBillable code
- I42.09: Other dilated cardiomyopathyBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: I00-I99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: I00-I99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: I00-I99 (chapter, inherited).
Excludes2
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
Source: I00-I99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: I00-I99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: I00-I99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: I00-I99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: I00-I99 (chapter, inherited).
Excludes2
systemic connective tissue disorders (M30-M36)
Source: I00-I99 (chapter, inherited).
Excludes2
transient cerebral ischemic attacks and related syndromes (G45.-)
Source: I00-I99 (chapter, inherited).
Includes
myocardiopathy
Source: I42 (category, inherited).
Code first
pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4)
Source: I42 (category, inherited).
Excludes2
ischemic cardiomyopathy (I25.5)
Source: I42 (category, inherited).
Excludes2
peripartum cardiomyopathy (O90.3)
Source: I42 (category, inherited).
Excludes2
ventricular hypertrophy (I51.7)
Source: I42 (category, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does I42.0 mean in FY2027?
The official ICD-10-CM descriptor is Dilated cardiomyopathy. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is I42.0 billable in FY2027?
The FY2027 order file marks I42.0 as a nonbillable heading. Select a complete billable child code.
Does I42.0 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition