I42 vs O90.3
I42 (Cardiomyopathy) compared with O90.3 (Peripartum cardiomyopathy), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. I42 carries an Excludes2 note covering O90.3: “peripartum cardiomyopathy (O90.3)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| I42Cardiomyopathy | O90.3Peripartum cardiomyopathy | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Cardiomyopathy is a non-billable ICD-10-CM category code (I42). | Peripartum cardiomyopathy is a billable ICD-10-CM diagnosis code (O90.3). |
| Includes | myocardiopathy | Conditions in I42.- arising during pregnancy and the puerperium |
| Code first | pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources