Excludes1 pair
A07.3 vs B60-
A07.3 and B60 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on B60
isosporiasis (A07.3)
A07.3
Isosporiasis
Billable
- Chapter 1
- Certain infectious and parasitic diseases
- Section
- A00-A09
Use when the record says
- Infection due to Isospora belli and Isospora hominis
- Intestinal coccidiosis
- Isosporosis
Indexed under
- Coccidiosis (intestinal)
- Isosporiasis, isosporosis
- Colitis › coccidial
- Diarrhea, diarrheal › coccidial
- Dysentery, dysenteric › coccidial
B60
Other protozoal diseases, not elsewhere classified
Not billable
- Chapter 1
- Certain infectious and parasitic diseases
- Section
- B50-B64
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027