Is A05.9 a billable ICD-10-CM code?

Yes. A05.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does A05.9 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 A05.9?

A05.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above A05.9 (A05) and apply to it just the same.

A05.9

A05.9 — Bacterial foodborne intoxication, unspecified

Billable / specific codeICD-10-CM

A05.9 is a billable, specific ICD-10-CM code for bacterial foodborne intoxication, unspecified. It is valid for submission on a claim.

Excludes1 inherited from the categories above A05.9

These are not written on A05.9, but they bind it: a note on a category applies to every code beneath it. Billing A05.9 with anything listed here is a denial.

Written on A05 — Other bacterial foodborne intoxications, not elsewhere classified

Clostridium difficile foodborne intoxication and infection (A04.7-)
Escherichia coli infection (A04.0-A04.4)
listeriosis (A32.-)
salmonella foodborne intoxication and infection (A02.-)
toxic effect of noxious foodstuffs (T61-T62)

Other codes that can never be billed with A05.9

These codes carry an Excludes1 note pointing at A05.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A05.9 alone.

A04Other bacterial intestinal infections
T61Toxic effect of noxious substances eaten as seafood
T62Toxic effect of other noxious substances eaten as food
T78.1Other adverse food reactions, not elsewhere classified

Risk adjustment

A05.9 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

A05.9 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56619Billing and Coding: Nerve Conduction Studies and Electromyography

How A05.9 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 A05.9.

Creotoxism
Kreotoxism
Indigestion›due to decomposed food NOS
Intoxication›foodborne
Poisoning›bacterial toxins
Poisoning›food NEC
Poisoning›kreotoxism, food
Intoxication›foodborne›bacterial
Poisoning›epidemic, fish›bacterial
Intoxication›foodborne›due to›bacterium

Code history

A05.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share A05. If A05.9 is not quite right, the correct code is usually one of these.

Questions about A05.9

Is A05.9 a billable ICD-10-CM code?: Yes. A05.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does A05.9 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 A05.9?: A05.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above A05.9 (A05) and apply to it just the same.