G71.3 vs G93.7
G71.3 (Mitochondrial myopathy, not elsewhere classified) compared with G93.7 (Reye's syndrome), 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. G71.3 carries an Excludes1 note covering G93.7: “Reye's syndrome (G93.7)”
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
| G71.3Mitochondrial myopathy, not elsewhere classified | G93.7Reye's syndrome | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | G00-G99 — Diseases of the Nervous System (G00-G99) |
| Definition | Mitochondrial myopathy, not elsewhere classified is a billable ICD-10-CM diagnosis code (G71.3). | Reye's syndrome is a billable ICD-10-CM diagnosis code (G93.7). |
| Use additional code | — | code for adverse effect due to salicylates, if applicable (T39.0-, with sixth character 5) |
| Code first | — | poisoning due to salicylates, if applicable (T39.0-, with sixth character 1-4) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources