ICDcodes.org
FY2027

I42.0 — Dilated cardiomyopathy

Not billableSubdivided FY2027

Can I still bill I42.0?

No — I42.0 stopped being billable on October 1, 2026. I42.0 still exists in ICD-10-CM but was subdivided for FY2027 and became a non-billable header code. Because I42.0 still appears in a code lookup, this change is easy to miss — but submitting it on or after October 1, 2026 will be denied for lack of specificity. Use one of the more specific codes below instead.

I42.0 at a glance

CodeI42.0
DescriptionDilated cardiomyopathy
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027
FY2027 changeSubdivided in FY2027 — no longer billable

Code first — inherited from I42

The underlying condition below must be sequenced before I42.0. I42.0 describes a manifestation and cannot be the principal or first-listed diagnosis.

  • pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4)

Excludes2 — not included here — inherited from Chapter 9

The conditions below are not part of I42.0, but a patient may have both at the same time. When documentation supports it, I42.0 and the excluded code may both be reported.

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Excludes2 — not included here — inherited from I42

The conditions below are not part of I42.0, but a patient may have both at the same time. When documentation supports it, I42.0 and the excluded code may both be reported.

  • ischemic cardiomyopathy (I25.5)
  • peripartum cardiomyopathy (O90.3)
  • ventricular hypertrophy (I51.7)

What codes fall under I42.0? (3)

How long has I42.0 existed?

I42.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the I42 family? (9)