G35 vs G37.3
G35 and G37.3 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on G37.3
multiple sclerosis (G35-)
G37.3
Acute transverse myelitis in demyelinating disease of central nervous system
Billable
- Chapter 6
- Diseases of the nervous system
- Section
- G35-G37
Use when the record says
- Acute transverse myelitis NOS
- Acute transverse myelopathy
Indexed under
- Myelitis › transverse (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute)
- Myelopathy › transverse, acute (spinal cord)
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