ICD-10-CM 2027 diagnosis code

E84Cystic fibrosis

Not billable — use a more specific code

E84 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E84

E84 is the ICD-10-CM diagnosis code for cystic fibrosis. It belongs to block E70-E88 (metabolic disorders) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: E84.0 (with pulmonary manifestations), E84.1 (with intestinal manifestations), E84.8 (with other manifestations) and E84.9 (unspecified).

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

Specific codes under E84

Coding notes

IncludesFurther defines the content of the category

mucoviscidosis

Code alsoTwo codes may be needed; sequencing depends on circumstances

exocrine pancreatic insufficiency (K86.81)

Notes that apply from higher levels

Instructions written at a parent level also apply to E84.

Broader instructions also apply from E70-E88 Metabolic disorders and Chapter 4: Endocrine, nutritional and metabolic diseases.

Codes whose notes reference E84

E08Code first
J93.12Code first
K86Excludes2
Q45.3Excludes1
Q55.3Code first
Z71.87Code also

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about E84

Is E84 billable?: No. E84 is a header code. Report one of its more specific subcodes instead.