A05.1 vs G70
A05.1 and G70 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.
A05.1
Botulism food poisoning
Billable
- Chapter 1
- Certain infectious and parasitic diseases
- Section
- A00-A09
Use when the record says
- Botulism NOS
- Classical foodborne intoxication due to Clostridium botulinum
Indexed under
- Botulism (foodborne intoxication)
- Poisoning › botulism (acute)
- Poisoning › Clostridium botulinum (acute)
- Enteritis › Clostridium › botulinum (acute) (diarrheal) (hemorrhagic) (noninfective)
- Infection, infected, infective › Clostridium NEC › botulinum (opportunistic)
G70
Myasthenia gravis and other myoneural disorders
Not billable
- Chapter 6
- Diseases of the nervous system
- Section
- G70-G73
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
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