ICD-10 · PDGM grouping
B66 Other fluke infections
All 8 codes in the B66 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
8
Can lead a claim
8
Cannot lead a claim
0
What CMS assigns to B66
All 8 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. None of the 8 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in B66
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| B66.0 | Opisthorchiasis | Can lead a claim | K | None |
| B66.1 | Clonorchiasis | Can lead a claim | K | None |
| B66.2 | Dicroceliasis | Can lead a claim | K | None |
| B66.3 | Fascioliasis | Can lead a claim | K | None |
| B66.4 | Paragonimiasis | Can lead a claim | K | None |
| B66.5 | Fasciolopsiasis | Can lead a claim | K | None |
| B66.8 | Other specified fluke infections | Can lead a claim | K | None |
| B66.9 | Fluke infection, unspecified | Can lead a claim | K | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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