FY2027
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Excludes1 pair

A05.1 vs G70-

A05.1 and G70 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 G70
botulism (A05.1, A48.51-A48.52)
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
  • Poisoning › Clostridium botulinum
  • Enteritis › Clostridium › botulinum (food poisoning)
  • Infection, infected, infective › Clostridium NEC › botulinum (food poisoning)
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