R50 vs R56.0
R50 (Fever of other and unknown origin) compared with R56.0 (Febrile convulsions), 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. R50 carries an Excludes1 note covering R56.0: “febrile convulsions (R56.0-)”
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
| R50Fever of other and unknown origin | R56.0Febrile convulsions | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Fever of other and unknown origin is a non-billable ICD-10-CM category code (R50). | Febrile convulsions is a non-billable ICD-10-CM category code (R56.0). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources