ICD-10 · PDGM grouping
O43 Placental disorders
All 48 codes in the O43 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
48
Can lead a claim
30
Cannot lead a claim
18
What CMS assigns to O43
30 of the 48 codes group to MMTA - Other; 18 are assigned no clinical group. None of the 48 is assigned a comorbidity subgroup. 30 of the 48 can lead a claim.
Every code in O43
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 |
|---|---|---|---|---|
| O43.0 Placental transfusion syndromes | ||||
| O43.01 Fetomaternal placental transfusion syndrome | ||||
| O43.011 | Fetomaternal placental transfusion syndrome, first trimester | Can lead a claim | A | None |
| O43.012 | Fetomaternal placental transfusion syndrome, second trimesterCMS: Fetomaternal placental transfuse syndrome, second trimester | Can lead a claim | A | None |
| O43.013 | Fetomaternal placental transfusion syndrome, third trimester | Can lead a claim | A | None |
| O43.019 | Fetomaternal placental transfusion syndrome, unspecified trimesterCMS: Fetomaternal placental transfusion syndrome, unsp trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.02 Fetus-to-fetus placental transfusion syndrome | ||||
| O43.021 | Fetus-to-fetus placental transfusion syndrome, first trimesterCMS: Fetus-to-fetus placental transfuse syndrome, first trimester | Can lead a claim | A | None |
| O43.022 | Fetus-to-fetus placental transfusion syndrome, second trimesterCMS: Fetus-to-fetus placntl transfuse syndrome, second trimester | Can lead a claim | A | None |
| O43.023 | Fetus-to-fetus placental transfusion syndrome, third trimesterCMS: Fetus-to-fetus placental transfuse syndrome, third trimester | Can lead a claim | A | None |
| O43.029 | Fetus-to-fetus placental transfusion syndrome, unspecified trimesterCMS: Fetus-to-fetus placental transfuse syndrome, unsp trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.1 Malformation of placenta | ||||
| O43.10 Malformation of placenta, unspecified | ||||
| O43.101 | Malformation of placenta, unspecified, first trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.102 | Malformation of placenta, unspecified, second trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.103 | Malformation of placenta, unspecified, third trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.109 | Malformation of placenta, unspecified, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.11 Circumvallate placenta | ||||
| O43.111 | Circumvallate placenta, first trimester | Can lead a claim | A | None |
| O43.112 | Circumvallate placenta, second trimester | Can lead a claim | A | None |
| O43.113 | Circumvallate placenta, third trimester | Can lead a claim | A | None |
| O43.119 | Circumvallate placenta, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.12 Velamentous insertion of umbilical cord | ||||
| O43.121 | Velamentous insertion of umbilical cord, first trimester | Can lead a claim | A | None |
| O43.122 | Velamentous insertion of umbilical cord, second trimester | Can lead a claim | A | None |
| O43.123 | Velamentous insertion of umbilical cord, third trimester | Can lead a claim | A | None |
| O43.129 | Velamentous insertion of umbilical cord, unspecified trimesterCMS: Velamentous insertion of umbilical cord, unsp trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.19 Other malformation of placenta | ||||
| O43.191 | Other malformation of placenta, first trimester | Can lead a claim | A | None |
| O43.192 | Other malformation of placenta, second trimester | Can lead a claim | A | None |
| O43.193 | Other malformation of placenta, third trimester | Can lead a claim | A | None |
| O43.199 | Other malformation of placenta, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.2 Morbidly adherent placenta | ||||
| O43.21 Placenta accreta | ||||
| O43.211 | Placenta accreta, first trimester | Can lead a claim | A | None |
| O43.212 | Placenta accreta, second trimester | Can lead a claim | A | None |
| O43.213 | Placenta accreta, third trimester | Can lead a claim | A | None |
| O43.219 | Placenta accreta, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.22 Placenta increta | ||||
| O43.221 | Placenta increta, first trimester | Can lead a claim | A | None |
| O43.222 | Placenta increta, second trimester | Can lead a claim | A | None |
| O43.223 | Placenta increta, third trimester | Can lead a claim | A | None |
| O43.229 | Placenta increta, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.23 Placenta percreta | ||||
| O43.231 | Placenta percreta, first trimester | Can lead a claim | A | None |
| O43.232 | Placenta percreta, second trimester | Can lead a claim | A | None |
| O43.233 | Placenta percreta, third trimester | Can lead a claim | A | None |
| O43.239 | Placenta percreta, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.8 Other placental disorders | ||||
| O43.81 Placental infarction | ||||
| O43.811 | Placental infarction, first trimester | Can lead a claim | A | None |
| O43.812 | Placental infarction, second trimester | Can lead a claim | A | None |
| O43.813 | Placental infarction, third trimester | Can lead a claim | A | None |
| O43.819 | Placental infarction, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.89 Other placental disorders | ||||
| O43.891 | Other placental disorders, first trimester | Can lead a claim | A | None |
| O43.892 | Other placental disorders, second trimester | Can lead a claim | A | None |
| O43.893 | Other placental disorders, third trimester | Can lead a claim | A | None |
| O43.899 | Other placental disorders, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.9 Unspecified placental disorder | ||||
| O43.90 | Unspecified placental disorder, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.91 | Unspecified placental disorder, first trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.92 | Unspecified placental disorder, second trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O43.93 | Unspecified placental disorder, third trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | 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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