F80.81 vs F98.5
F80.81 (Childhood onset fluency disorder) compared with F98.5 (Adult onset fluency disorder), 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. F80.81 carries an Excludes1 note covering F98.5: “adult onset fluency disorder (F98.5)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. F98.5 carries an Excludes1 note covering F80.81: “childhood onset fluency disorder (F80.81)”
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
| F80.81Childhood onset fluency disorder | F98.5Adult onset fluency disorder | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) | F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) |
| Definition | Childhood onset fluency disorder is a billable ICD-10-CM diagnosis code (F80.81). | Adult onset fluency disorder is a billable ICD-10-CM diagnosis code (F98.5). |
| Includes | Cluttering NOS Stuttering NOS | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources