MCMCB Pro
E84

E84Cystic fibrosis

Non-billable headerICD-10-CM

E84 is a non-billable header ICD-10-CM code for cystic fibrosis. It cannot be billed on its own: choose one of the more specific child codes below.

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

  • exocrine pancreatic insufficiency (K86.81)

Includes

Conditions this code covers.

  • mucoviscidosis

Other codes that can never be billed with E84

These codes carry an Excludes1 note pointing at E84. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E84 alone.

  • P76.0Meconium plug syndrome
  • P78Other perinatal digestive system disorders
  • Q33.0Congenital cystic lung
  • Q41Congenital absence, atresia and stenosis of small intestine
  • Q45.3Other congenital malformations of pancreas and pancreatic duct
  • J99Respiratory disorders in diseases classified elsewhere
  • K56Paralytic ileus and intestinal obstruction without hernia

Risk adjustment

E84 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead E84

4 child codes. Green means billable.

Questions about E84

Is E84 a billable ICD-10-CM code?
No. E84 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E84 sit in the tabular list?
Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.