Is A07.3 a billable ICD-10-CM code?

Yes. A07.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does A07.3 sit in the tabular list?

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

A07.3

A07.3 — Isosporiasis

Billable / specific codeICD-10-CM

A07.3 is a billable, specific ICD-10-CM code for isosporiasis. It is valid for submission on a claim.

Inclusion terms

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

Infection due to Isospora belli and Isospora hominis
Intestinal coccidiosis
Isosporosis

Other codes that can never be billed with A07.3

These codes carry an Excludes1 note pointing at A07.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A07.3 alone.

B60Other protozoal diseases, not elsewhere classified

Risk adjustment

A07.3 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

A07.3 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56456Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
A56632Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy

How A07.3 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 A07.3.

Coccidiosis(intestinal)
Isosporiasis, isosporosis
Colitis›coccidial
Diarrhea, diarrheal›coccidial
Dysentery, dysenteric›coccidial
Enteritis›coccidial
Infection, infected, infective›Isospora belli or hominis
Infestation›coccidial

Related codes at this level

Codes that share A07. If A07.3 is not quite right, the correct code is usually one of these.

Questions about A07.3

Is A07.3 a billable ICD-10-CM code?: Yes. A07.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does A07.3 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Intestinal infectious diseases (A00-A09).