A05.1 — Botulism food poisoning
A05.1 is a billable, specific ICD-10-CM code for botulism food poisoning. It is valid for submission on a claim.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Botulism NOS
- Classical foodborne intoxication due to Clostridium botulinum
Other codes that can never be billed with A05.1
These codes carry an Excludes1 note pointing at A05.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A05.1 alone.
Risk adjustment
A05.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
A05.1 is named in 14 Medicare coverage policies — 14 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54095Billing and Coding: Nerve Conduction Studies and Electromyography
- A54095Billing and Coding: Nerve Conduction Studies and Electromyography
- A54969Billing and Coding: Nerve Conduction Studies and Electromyography
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
How A05.1 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to A05.1.
- Botulism(foodborne intoxication)
- Poisoning›botulism
- Poisoning›Clostridium botulinum
- Enteritis›Clostridium›botulinum(food poisoning)
- Infection, infected, infective›Clostridium NEC›botulinum(food poisoning)
- Intoxication›foodborne›classical(Clostridium botulinum)
- Poisoning›Bacillus B›botulinus
- Intoxication›foodborne›due to›Clostridium›botulinum
- Poisoning›food NEC›due to›Bacillus›botulinus
Related codes at this level
Codes that share A05. If A05.1 is not quite right, the correct code is usually one of these.
- A05.0Foodborne staphylococcal intoxication
- A05.2Foodborne Clostridium perfringens [Clostridium welchii] intoxication
- A05.3Foodborne Vibrio parahaemolyticus intoxication
- A05.4Foodborne Bacillus cereus intoxication
- A05.5Foodborne Vibrio vulnificus intoxication
- A05.8Other specified bacterial foodborne intoxications
- A05.9Bacterial foodborne intoxication, unspecified
Questions about A05.1
- Is A05.1 a billable ICD-10-CM code?
- Yes. A05.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A05.1 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Intestinal infectious diseases (A00-A09).
- What cannot be coded together with A05.1?
- A05.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.