Excludes1 pair
G25.3 vs G40-
G25.3 and G40 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on G25.3
myoclonic epilepsy (G40.-)
G25.3
Myoclonus
Billable
- Chapter 6
- Diseases of the nervous system
- Section
- G20-G26
Use when the record says
- Drug-induced myoclonus
- Palatal myoclonus
Indexed under
- Jerks, myoclonic
- Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex)
- Paramyoclonus multiplex
- Convulsions › myoclonic
- Myoclonus, myoclonic, myoclonia › drug-induced
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027