Is A04.4 a billable ICD-10-CM code?

Yes. A04.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does A04.4 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Intestinal infectious diseases (A00-A09).

A04.4

A04.4 — Other intestinal Escherichia coli infections

Billable / specific codeICD-10-CM

A04.4 is a billable, specific ICD-10-CM code for other intestinal escherichia coli infections. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Escherichia coli enteritis NOS

Other codes that can never be billed with A04.4

These codes carry an Excludes1 note pointing at A04.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A04.4 alone.

A05Other bacterial foodborne intoxications, not elsewhere classified

Risk adjustment

A04.4 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

A04.4 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A58801Billing and Coding: Pharmacogenomics Testing
A58812Billing and Coding: Pharmacogenomics Testing
A59915Billing and Coding: Pharmacogenomic Testing

How A04.4 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 A04.4.

Diarrhea, diarrheal›due to›Escherichia coli
Diarrhea, diarrheal›due to›Escherichia coli›enteroaggregative
Diarrhea, diarrheal›due to›Escherichia coli›specified NEC
Enteritis›infectious NOS›due to›Escherichia coli
Enteritis›infectious NOS›due to›Escherichia coli›enteroaggregative
Enteritis›infectious NOS›due to›Escherichia coli›specified NEC

Related codes at this level

Codes that share A04. If A04.4 is not quite right, the correct code is usually one of these.

Questions about A04.4

Is A04.4 a billable ICD-10-CM code?: Yes. A04.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does A04.4 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Intestinal infectious diseases (A00-A09).