ICD-10 · PDGM grouping
O12 Gestational [pregnancy-induced] edema and proteinuria without hypertension
All 18 codes in the O12 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
18
Can lead a claim
15
Cannot lead a claim
3
What CMS assigns to O12
15 of the 18 codes group to MMTA - Other; 3 are assigned no clinical group. None of the 18 is assigned a comorbidity subgroup. 15 of the 18 can lead a claim.
Every code in O12
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 |
|---|---|---|---|---|
| O12.0 Gestational edema | ||||
| O12.00 | Gestational edema, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O12.01 | Gestational edema, first trimester | Can lead a claim | A | None |
| O12.02 | Gestational edema, second trimester | Can lead a claim | A | None |
| O12.03 | Gestational edema, third trimester | Can lead a claim | A | None |
| O12.04 | Gestational edema, complicating childbirth | Can lead a claim | A | None |
| O12.05 | Gestational edema, complicating the puerperium | Can lead a claim | A | None |
| O12.1 Gestational proteinuria | ||||
| O12.10 | Gestational proteinuria, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O12.11 | Gestational proteinuria, first trimester | Can lead a claim | A | None |
| O12.12 | Gestational proteinuria, second trimester | Can lead a claim | A | None |
| O12.13 | Gestational proteinuria, third trimester | Can lead a claim | A | None |
| O12.14 | Gestational proteinuria, complicating childbirth | Can lead a claim | A | None |
| O12.15 | Gestational proteinuria, complicating the puerperium | Can lead a claim | A | None |
| O12.2 Gestational edema with proteinuria | ||||
| O12.20 | Gestational edema with proteinuria, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O12.21 | Gestational edema with proteinuria, first trimester | Can lead a claim | A | None |
| O12.22 | Gestational edema with proteinuria, second trimester | Can lead a claim | A | None |
| O12.23 | Gestational edema with proteinuria, third trimester | Can lead a claim | A | None |
| O12.24 | Gestational edema with proteinuria, complicating childbirth | Can lead a claim | A | None |
| O12.25 | Gestational edema with proteinuria, complicating the puerperiumCMS: Gestational edema with proteinuria, comp the puerperium | Can lead a claim | A | 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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