E84.11Meconium ileus in cystic fibrosis

E84.11 is the ICD-10-CM diagnosis code for meconium ileus in cystic fibrosis. It belongs to category E84 (cystic fibrosis), block E70-E88 (metabolic disorders) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within E84.1 (cystic fibrosis with intestinal manifestations), E84.11 is specifically for meconium ileus in cystic fibrosis. Related codes cover cystic fibrosis with other intestinal manifestations (E84.19).

Don't report E84.11 together with the conditions in its Excludes1 note: meconium ileus not due to cystic fibrosis (P76.0).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

The Medicare Code Editor expects this diagnosis only for newborns (age 0); reporting it for an older patient triggers an age-conflict edit.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 277.01 (cystic fibrosis with meconium ileus).