E84 vs Q45.3
E84 (Cystic fibrosis) compared with Q45.3 (Other congenital malformations of pancreas and pancreatic duct), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Q45.3 carries an Excludes1 note covering E84: “fibrocystic disease of pancreas (E84.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| E84Cystic fibrosis | Q45.3Other congenital malformations of pancreas and pancreatic duct | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Cystic fibrosis is a non-billable ICD-10-CM category code (E84). | Other congenital malformations of pancreas and pancreatic duct is a billable ICD-10-CM diagnosis code (Q45.3). |
| Includes | mucoviscidosis | Accessory pancreas Congenital malformation of pancreas or pancreatic duct NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources