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

Z67 Blood type

All 14 codes in the Z67 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

14

Can lead a claim

0

Cannot lead a claim

14

What CMS assigns to Z67

None of the 14 codes is assigned a clinical group. None of the 14 is assigned a comorbidity subgroup. None can lead a claim.

Every code in Z67

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

CodeDescriptionPrimary positionClinical groupComorbidity subgroup
Z67.1 Type A blood
Z67.10Type A blood, Rh positiveCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.11Type A blood, Rh negativeCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.2 Type B blood
Z67.20Type B blood, Rh positiveCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.21Type B blood, Rh negativeCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.3 Type AB blood
Z67.30Type AB blood, Rh positiveCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.31Type AB blood, Rh negativeCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.4 Type O blood
Z67.40Type O blood, Rh positiveCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.41Type O blood, Rh negativeCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.9 Unspecified blood type
Z67.90Unspecified blood type, Rh positiveCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.91Unspecified blood type, Rh negativeCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.A Duffy phenotype
Z67.A1Duffy nullCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.A2Duffy a positiveCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.A3Duffy b positiveCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
Z67.A4Duffy a and b positiveCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone

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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