Excludes1 pair
B82.0 vs B83.9
B82.0 and B83.9 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 B83.9
intestinal helminthiasis NOS (B82.0)
B82.0
Intestinal helminthiasis, unspecified
BillableUnspecified
- Chapter 1
- Certain infectious and parasitic diseases
- Section
- B65-B83
Indexed under
- Nematodiasis (intestinal)
- Dysentery, dysenteric › metazoal
- Helminthiasis › intestinal
- Infection, infected, infective › roundworm NEC (large)
- Infestation › nematode NEC (intestinal)
B83.9
Helminthiasis, unspecified
BillableUnspecified
- Chapter 1
- Certain infectious and parasitic diseases
- Section
- B65-B83
Use when the record says
- Worms NOS
Indexed under
- Colic › worm NOS
- Fever › worm
- Infection, infected, infective › helminths
- Infection, infected, infective › worms
- Infestation › helminth
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