October 1 update. Our PDGM and ICD-10 tools now use the FY2027 code set: 190 codes added, 30 deleted, and no existing code changed clinical group.

See what changed

ICD-10 · PDGM grouping

W59 Contact with other nonvenomous reptiles

All 42 codes in the W59 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.

ICD-10-CM FY2027 · CMS grouper v07.2.26

Codes in family

42

Can lead a claim

0

Cannot lead a claim

42

What CMS assigns to W59

None of the 42 codes is assigned a clinical group. None of the 42 is assigned a comorbidity subgroup. None can lead a claim.

Every code in W59

Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.

CodeDescriptionPrimary positionClinical groupComorbidity subgroup
W59.0 Contact with nonvenomous lizards
W59.01 Bitten by nonvenomous lizards
W59.01XABitten by nonvenomous lizards, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.01XDBitten by nonvenomous lizards, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.01XSBitten by nonvenomous lizards, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.02 Struck by nonvenomous lizards
W59.02XAStruck by nonvenomous lizards, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.02XDStruck by nonvenomous lizards, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.02XSStruck by nonvenomous lizards, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.09 Other contact with nonvenomous lizards
W59.09XAOther contact with nonvenomous lizards, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.09XDOther contact with nonvenomous lizards, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.09XSOther contact with nonvenomous lizards, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.1 Contact with nonvenomous snakes
W59.11 Bitten by nonvenomous snake
W59.11XABitten by nonvenomous snake, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.11XDBitten by nonvenomous snake, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.11XSBitten by nonvenomous snake, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.12 Struck by nonvenomous snake
W59.12XAStruck by nonvenomous snake, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.12XDStruck by nonvenomous snake, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.12XSStruck by nonvenomous snake, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.13 Crushed by nonvenomous snake
W59.13XACrushed by nonvenomous snake, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.13XDCrushed by nonvenomous snake, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.13XSCrushed by nonvenomous snake, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.19 Other contact with nonvenomous snake
W59.19XAOther contact with nonvenomous snake, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.19XDOther contact with nonvenomous snake, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.19XSOther contact with nonvenomous snake, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.2 Contact with turtles
W59.21 Bitten by turtle
W59.21XABitten by turtle, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.21XDBitten by turtle, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.21XSBitten by turtle, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.22 Struck by turtle
W59.22XAStruck by turtle, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.22XDStruck by turtle, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.22XSStruck by turtle, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.29 Other contact with turtle
W59.29XAOther contact with turtle, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.29XDOther contact with turtle, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.29XSOther contact with turtle, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.8 Contact with other nonvenomous reptiles
W59.81 Bitten by other nonvenomous reptiles
W59.81XABitten by other nonvenomous reptiles, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.81XDBitten by other nonvenomous reptiles, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.81XSBitten by other nonvenomous reptiles, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.82 Struck by other nonvenomous reptiles
W59.82XAStruck by other nonvenomous reptiles, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.82XDStruck by other nonvenomous reptiles, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.82XSStruck by other nonvenomous reptiles, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.83 Crushed by other nonvenomous reptiles
W59.83XACrushed by other nonvenomous reptiles, initial encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.83XDCrushed by other nonvenomous reptiles, subsequent encounterCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.83XSCrushed by other nonvenomous reptiles, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.89 Other contact with other nonvenomous reptiles
W59.89XAOther contact with other nonvenomous reptiles, initial encounterCMS: Other contact with other nonvenomous reptiles, init encntrCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.89XDOther contact with other nonvenomous reptiles, subsequent encounterCMS: Other contact with other nonvenomous reptiles, subs encntrCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone
W59.89XSOther contact with other nonvenomous reptiles, sequelaCannot lead a claimExternal cause of injury code not reportable as principal diagnosisNoneNone

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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