Is A05 a billable ICD-10-CM code?

No. A05 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A05 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?

A05 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

A05

A05 — Other bacterial foodborne intoxications, not elsewhere classified

Non-billable headerICD-10-CM

A05 is a non-billable header ICD-10-CM code for other bacterial foodborne intoxications, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

These codes carry an Excludes1 note pointing at A05. 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 alone.

A04Other bacterial intestinal infections
A48.5Other specified botulism
G70Myasthenia gravis and other myoneural disorders
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 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.

Code to one of these instead A05

8 child codes. Green means billable.

Questions about A05

Is A05 a billable ICD-10-CM code?: No. A05 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A05 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?: A05 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.