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

O11 Pre-existing hypertension with pre-eclampsia

All 6 codes in the O11 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

6

Can lead a claim

5

Cannot lead a claim

1

What CMS assigns to O11

5 of the 6 codes group to MMTA - Other; 1 is assigned no clinical group. None of the 6 is assigned a comorbidity subgroup. 5 of the 6 can lead a claim.

Every code in O11

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

CodeDescriptionPrimary positionClinical groupComorbidity subgroup
O11.1Pre-existing hypertension with pre-eclampsia, first trimesterCMS: Pre-existing hypertension w pre-eclampsia, first trimesterCan lead a claimANone
O11.2Pre-existing hypertension with pre-eclampsia, second trimesterCMS: Pre-existing hypertension w pre-eclampsia, second trimesterCan lead a claimANone
O11.3Pre-existing hypertension with pre-eclampsia, third trimesterCMS: Pre-existing hypertension w pre-eclampsia, third trimesterCan lead a claimANone
O11.4Pre-existing hypertension with pre-eclampsia, complicating childbirthCMS: Pre-existing htn with pre-eclampsia, comp childbirthCan lead a claimANone
O11.5Pre-existing hypertension with pre-eclampsia, complicating the puerperiumCMS: Pre-existing htn with pre-eclampsia, comp the puerperiumCan lead a claimANone
O11.9Pre-existing hypertension with pre-eclampsia, unspecified trimesterCMS: Pre-existing hypertension with pre-eclampsia, unsp trimesterCannot 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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