Excludes1 pair
G71.3 vs G93.7
G71.3 and G93.7 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 G71.3
Reye's syndrome (G93.7)
G71.3
Mitochondrial myopathy, not elsewhere classified
BillableUnspecified
- Chapter 6
- Diseases of the nervous system
- Section
- G70-G73
Indexed under
- Myopathy › mitochondrial NEC
G93.7
Reye's syndrome
Billable
- Chapter 6
- Diseases of the nervous system
- Section
- G89-G99
Indexed under
- Reye's syndrome
- Syndrome › Reye's
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