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A05.1

A05.1Botulism food poisoning

Billable / specific codeICD-10-CM

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.

  • A48.5Other specified botulism
  • G70Myasthenia gravis and other myoneural disorders

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)
  • Poisoningbotulism
  • PoisoningClostridium botulinum
  • EnteritisClostridiumbotulinum(food poisoning)
  • Infection, infected, infectiveClostridium NECbotulinum(food poisoning)
  • Intoxicationfoodborneclassical(Clostridium botulinum)
  • PoisoningBacillus Bbotulinus
  • Intoxicationfoodbornedue toClostridiumbotulinum
  • Poisoningfood NECdue toBacillusbotulinus

Related codes at this level

Codes that share A05. If A05.1 is not quite right, the correct code is usually one of these.

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.
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.