ICD-10 · PDGM grouping
O41 Other disorders of amniotic fluid and membranes
All 168 codes in the O41 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
168
Can lead a claim
84
Cannot lead a claim
84
What CMS assigns to O41
84 of the 168 codes group to MMTA - Other; 84 are assigned no clinical group. None of the 168 is assigned a comorbidity subgroup. 84 of the 168 can lead a claim.
Every code in O41
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 |
|---|---|---|---|---|
| O41.0 Oligohydramnios | ||||
| O41.00 Oligohydramnios, unspecified trimester | ||||
| O41.00X0 | Oligohydramnios, unspecified trimester, not applicable or unspecifiedCMS: Oligohydramnios, unsp trimester, not applicable or unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.00X1 | Oligohydramnios, unspecified trimester, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.00X2 | Oligohydramnios, unspecified trimester, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.00X3 | Oligohydramnios, unspecified trimester, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.00X4 | Oligohydramnios, unspecified trimester, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.00X5 | Oligohydramnios, unspecified trimester, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.00X9 | Oligohydramnios, unspecified trimester, other fetus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.01 Oligohydramnios, first trimester | ||||
| O41.01X0 | Oligohydramnios, first trimester, not applicable or unspecifiedCMS: Oligohydramnios, first trimester, not applicable or unsp | Can lead a claim | A | None |
| O41.01X1 | Oligohydramnios, first trimester, fetus 1 | Can lead a claim | A | None |
| O41.01X2 | Oligohydramnios, first trimester, fetus 2 | Can lead a claim | A | None |
| O41.01X3 | Oligohydramnios, first trimester, fetus 3 | Can lead a claim | A | None |
| O41.01X4 | Oligohydramnios, first trimester, fetus 4 | Can lead a claim | A | None |
| O41.01X5 | Oligohydramnios, first trimester, fetus 5 | Can lead a claim | A | None |
| O41.01X9 | Oligohydramnios, first trimester, other fetus | Can lead a claim | A | None |
| O41.02 Oligohydramnios, second trimester | ||||
| O41.02X0 | Oligohydramnios, second trimester, not applicable or unspecifiedCMS: Oligohydramnios, second trimester, not applicable or unsp | Can lead a claim | A | None |
| O41.02X1 | Oligohydramnios, second trimester, fetus 1 | Can lead a claim | A | None |
| O41.02X2 | Oligohydramnios, second trimester, fetus 2 | Can lead a claim | A | None |
| O41.02X3 | Oligohydramnios, second trimester, fetus 3 | Can lead a claim | A | None |
| O41.02X4 | Oligohydramnios, second trimester, fetus 4 | Can lead a claim | A | None |
| O41.02X5 | Oligohydramnios, second trimester, fetus 5 | Can lead a claim | A | None |
| O41.02X9 | Oligohydramnios, second trimester, other fetus | Can lead a claim | A | None |
| O41.03 Oligohydramnios, third trimester | ||||
| O41.03X0 | Oligohydramnios, third trimester, not applicable or unspecifiedCMS: Oligohydramnios, third trimester, not applicable or unsp | Can lead a claim | A | None |
| O41.03X1 | Oligohydramnios, third trimester, fetus 1 | Can lead a claim | A | None |
| O41.03X2 | Oligohydramnios, third trimester, fetus 2 | Can lead a claim | A | None |
| O41.03X3 | Oligohydramnios, third trimester, fetus 3 | Can lead a claim | A | None |
| O41.03X4 | Oligohydramnios, third trimester, fetus 4 | Can lead a claim | A | None |
| O41.03X5 | Oligohydramnios, third trimester, fetus 5 | Can lead a claim | A | None |
| O41.03X9 | Oligohydramnios, third trimester, other fetus | Can lead a claim | A | None |
| O41.1 Infection of amniotic sac and membranes | ||||
| O41.10 Infection of amniotic sac and membranes, unspecified | ||||
| O41.101 Infection of amniotic sac and membranes, unspecified, first trimester | ||||
| O41.1010 | Infection of amniotic sac and membranes, unspecified, first trimester, not applicable or unspecifiedCMS: Infct of amniotic sac and membrns, unsp, first tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1011 | Infection of amniotic sac and membranes, unspecified, first trimester, fetus 1CMS: Infct of amniotic sac and membrns, unsp, first tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1012 | Infection of amniotic sac and membranes, unspecified, first trimester, fetus 2CMS: Infct of amniotic sac and membrns, unsp, first tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1013 | Infection of amniotic sac and membranes, unspecified, first trimester, fetus 3CMS: Infct of amniotic sac and membrns, unsp, first tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1014 | Infection of amniotic sac and membranes, unspecified, first trimester, fetus 4CMS: Infct of amniotic sac and membrns, unsp, first tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1015 | Infection of amniotic sac and membranes, unspecified, first trimester, fetus 5CMS: Infct of amniotic sac and membrns, unsp, first tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1019 | Infection of amniotic sac and membranes, unspecified, first trimester, other fetusCMS: Infct of amniotic sac and membrns, unsp, first tri, oth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.102 Infection of amniotic sac and membranes, unspecified, second trimester | ||||
| O41.1020 | Infection of amniotic sac and membranes, unspecified, second trimester, not applicable or unspecifiedCMS: Infct of amniotic sac and membrns, unsp, second tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1021 | Infection of amniotic sac and membranes, unspecified, second trimester, fetus 1CMS: Infct of amniotic sac and membrns, unsp, second tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1022 | Infection of amniotic sac and membranes, unspecified, second trimester, fetus 2CMS: Infct of amniotic sac and membrns, unsp, second tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1023 | Infection of amniotic sac and membranes, unspecified, second trimester, fetus 3CMS: Infct of amniotic sac and membrns, unsp, second tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1024 | Infection of amniotic sac and membranes, unspecified, second trimester, fetus 4CMS: Infct of amniotic sac and membrns, unsp, second tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1025 | Infection of amniotic sac and membranes, unspecified, second trimester, fetus 5CMS: Infct of amniotic sac and membrns, unsp, second tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1029 | Infection of amniotic sac and membranes, unspecified, second trimester, other fetusCMS: Infct of amniotic sac and membrns, unsp, second tri, oth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.103 Infection of amniotic sac and membranes, unspecified, third trimester | ||||
| O41.1030 | Infection of amniotic sac and membranes, unspecified, third trimester, not applicable or unspecifiedCMS: Infct of amniotic sac and membrns, unsp, third tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1031 | Infection of amniotic sac and membranes, unspecified, third trimester, fetus 1CMS: Infct of amniotic sac and membrns, unsp, third tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1032 | Infection of amniotic sac and membranes, unspecified, third trimester, fetus 2CMS: Infct of amniotic sac and membrns, unsp, third tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1033 | Infection of amniotic sac and membranes, unspecified, third trimester, fetus 3CMS: Infct of amniotic sac and membrns, unsp, third tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1034 | Infection of amniotic sac and membranes, unspecified, third trimester, fetus 4CMS: Infct of amniotic sac and membrns, unsp, third tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1035 | Infection of amniotic sac and membranes, unspecified, third trimester, fetus 5CMS: Infct of amniotic sac and membrns, unsp, third tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1039 | Infection of amniotic sac and membranes, unspecified, third trimester, other fetusCMS: Infct of amniotic sac and membrns, unsp, third tri, oth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.109 Infection of amniotic sac and membranes, unspecified, unspecified trimester | ||||
| O41.1090 | Infection of amniotic sac and membranes, unspecified, unspecified trimester, not applicable or unspecifiedCMS: Infct of amniotic sac and membrns, unsp, unsp tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1091 | Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 1CMS: Infct of amniotic sac and membrns, unsp, unsp tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1092 | Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 2CMS: Infct of amniotic sac and membrns, unsp, unsp tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1093 | Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 3CMS: Infct of amniotic sac and membrns, unsp, unsp tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1094 | Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 4CMS: Infct of amniotic sac and membrns, unsp, unsp tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1095 | Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 5CMS: Infct of amniotic sac and membrns, unsp, unsp tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1099 | Infection of amniotic sac and membranes, unspecified, unspecified trimester, other fetusCMS: Infct of amniotic sac and membrns, unsp, unsp trimester, oth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.12 Chorioamnionitis | ||||
| O41.121 Chorioamnionitis, first trimester | ||||
| O41.1210 | Chorioamnionitis, first trimester, not applicable or unspecifiedCMS: Chorioamnionitis, first trimester, not applicable or unsp | Can lead a claim | A | None |
| O41.1211 | Chorioamnionitis, first trimester, fetus 1 | Can lead a claim | A | None |
| O41.1212 | Chorioamnionitis, first trimester, fetus 2 | Can lead a claim | A | None |
| O41.1213 | Chorioamnionitis, first trimester, fetus 3 | Can lead a claim | A | None |
| O41.1214 | Chorioamnionitis, first trimester, fetus 4 | Can lead a claim | A | None |
| O41.1215 | Chorioamnionitis, first trimester, fetus 5 | Can lead a claim | A | None |
| O41.1219 | Chorioamnionitis, first trimester, other fetus | Can lead a claim | A | None |
| O41.122 Chorioamnionitis, second trimester | ||||
| O41.1220 | Chorioamnionitis, second trimester, not applicable or unspecifiedCMS: Chorioamnionitis, second trimester, not applicable or unsp | Can lead a claim | A | None |
| O41.1221 | Chorioamnionitis, second trimester, fetus 1 | Can lead a claim | A | None |
| O41.1222 | Chorioamnionitis, second trimester, fetus 2 | Can lead a claim | A | None |
| O41.1223 | Chorioamnionitis, second trimester, fetus 3 | Can lead a claim | A | None |
| O41.1224 | Chorioamnionitis, second trimester, fetus 4 | Can lead a claim | A | None |
| O41.1225 | Chorioamnionitis, second trimester, fetus 5 | Can lead a claim | A | None |
| O41.1229 | Chorioamnionitis, second trimester, other fetus | Can lead a claim | A | None |
| O41.123 Chorioamnionitis, third trimester | ||||
| O41.1230 | Chorioamnionitis, third trimester, not applicable or unspecifiedCMS: Chorioamnionitis, third trimester, not applicable or unsp | Can lead a claim | A | None |
| O41.1231 | Chorioamnionitis, third trimester, fetus 1 | Can lead a claim | A | None |
| O41.1232 | Chorioamnionitis, third trimester, fetus 2 | Can lead a claim | A | None |
| O41.1233 | Chorioamnionitis, third trimester, fetus 3 | Can lead a claim | A | None |
| O41.1234 | Chorioamnionitis, third trimester, fetus 4 | Can lead a claim | A | None |
| O41.1235 | Chorioamnionitis, third trimester, fetus 5 | Can lead a claim | A | None |
| O41.1239 | Chorioamnionitis, third trimester, other fetus | Can lead a claim | A | None |
| O41.129 Chorioamnionitis, unspecified trimester | ||||
| O41.1290 | Chorioamnionitis, unspecified trimester, not applicable or unspecifiedCMS: Chorioamnionitis, unsp trimester, not applicable or unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1291 | Chorioamnionitis, unspecified trimester, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1292 | Chorioamnionitis, unspecified trimester, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1293 | Chorioamnionitis, unspecified trimester, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1294 | Chorioamnionitis, unspecified trimester, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1295 | Chorioamnionitis, unspecified trimester, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1299 | Chorioamnionitis, unspecified trimester, other fetus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.14 Placentitis | ||||
| O41.141 Placentitis, first trimester | ||||
| O41.1410 | Placentitis, first trimester, not applicable or unspecified | Can lead a claim | A | None |
| O41.1411 | Placentitis, first trimester, fetus 1 | Can lead a claim | A | None |
| O41.1412 | Placentitis, first trimester, fetus 2 | Can lead a claim | A | None |
| O41.1413 | Placentitis, first trimester, fetus 3 | Can lead a claim | A | None |
| O41.1414 | Placentitis, first trimester, fetus 4 | Can lead a claim | A | None |
| O41.1415 | Placentitis, first trimester, fetus 5 | Can lead a claim | A | None |
| O41.1419 | Placentitis, first trimester, other fetus | Can lead a claim | A | None |
| O41.142 Placentitis, second trimester | ||||
| O41.1420 | Placentitis, second trimester, not applicable or unspecified | Can lead a claim | A | None |
| O41.1421 | Placentitis, second trimester, fetus 1 | Can lead a claim | A | None |
| O41.1422 | Placentitis, second trimester, fetus 2 | Can lead a claim | A | None |
| O41.1423 | Placentitis, second trimester, fetus 3 | Can lead a claim | A | None |
| O41.1424 | Placentitis, second trimester, fetus 4 | Can lead a claim | A | None |
| O41.1425 | Placentitis, second trimester, fetus 5 | Can lead a claim | A | None |
| O41.1429 | Placentitis, second trimester, other fetus | Can lead a claim | A | None |
| O41.143 Placentitis, third trimester | ||||
| O41.1430 | Placentitis, third trimester, not applicable or unspecified | Can lead a claim | A | None |
| O41.1431 | Placentitis, third trimester, fetus 1 | Can lead a claim | A | None |
| O41.1432 | Placentitis, third trimester, fetus 2 | Can lead a claim | A | None |
| O41.1433 | Placentitis, third trimester, fetus 3 | Can lead a claim | A | None |
| O41.1434 | Placentitis, third trimester, fetus 4 | Can lead a claim | A | None |
| O41.1435 | Placentitis, third trimester, fetus 5 | Can lead a claim | A | None |
| O41.1439 | Placentitis, third trimester, other fetus | Can lead a claim | A | None |
| O41.149 Placentitis, unspecified trimester | ||||
| O41.1490 | Placentitis, unspecified trimester, not applicable or unspecifiedCMS: Placentitis, unsp trimester, not applicable or unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1491 | Placentitis, unspecified trimester, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1492 | Placentitis, unspecified trimester, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1493 | Placentitis, unspecified trimester, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1494 | Placentitis, unspecified trimester, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1495 | Placentitis, unspecified trimester, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.1499 | Placentitis, unspecified trimester, other fetus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.8 Other specified disorders of amniotic fluid and membranes | ||||
| O41.8X Other specified disorders of amniotic fluid and membranes | ||||
| O41.8X1 Other specified disorders of amniotic fluid and membranes, first trimester | ||||
| O41.8X10 | Other specified disorders of amniotic fluid and membranes, first trimester, not applicable or unspecifiedCMS: Oth disrd of amniotic fluid and membrns, first tri, unsp | Can lead a claim | A | None |
| O41.8X11 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 1CMS: Oth disrd of amniotic fluid and membrns, first tri, fetus 1 | Can lead a claim | A | None |
| O41.8X12 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 2CMS: Oth disrd of amniotic fluid and membrns, first tri, fetus 2 | Can lead a claim | A | None |
| O41.8X13 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 3CMS: Oth disrd of amniotic fluid and membrns, first tri, fetus 3 | Can lead a claim | A | None |
| O41.8X14 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 4CMS: Oth disrd of amniotic fluid and membrns, first tri, fetus 4 | Can lead a claim | A | None |
| O41.8X15 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 5CMS: Oth disrd of amniotic fluid and membrns, first tri, fetus 5 | Can lead a claim | A | None |
| O41.8X19 | Other specified disorders of amniotic fluid and membranes, first trimester, other fetusCMS: Oth disrd of amniotic fluid and membrns, first tri, oth | Can lead a claim | A | None |
| O41.8X2 Other specified disorders of amniotic fluid and membranes, second trimester | ||||
| O41.8X20 | Other specified disorders of amniotic fluid and membranes, second trimester, not applicable or unspecifiedCMS: Oth disrd of amniotic fluid and membrns, second tri, unsp | Can lead a claim | A | None |
| O41.8X21 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 1CMS: Oth disrd of amniotic fluid and membrns, second tri, fetus 1 | Can lead a claim | A | None |
| O41.8X22 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 2CMS: Oth disrd of amniotic fluid and membrns, second tri, fetus 2 | Can lead a claim | A | None |
| O41.8X23 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 3CMS: Oth disrd of amniotic fluid and membrns, second tri, fetus 3 | Can lead a claim | A | None |
| O41.8X24 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 4CMS: Oth disrd of amniotic fluid and membrns, second tri, fetus 4 | Can lead a claim | A | None |
| O41.8X25 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 5CMS: Oth disrd of amniotic fluid and membrns, second tri, fetus 5 | Can lead a claim | A | None |
| O41.8X29 | Other specified disorders of amniotic fluid and membranes, second trimester, other fetusCMS: Oth disrd of amniotic fluid and membrns, second tri, oth | Can lead a claim | A | None |
| O41.8X3 Other specified disorders of amniotic fluid and membranes, third trimester | ||||
| O41.8X30 | Other specified disorders of amniotic fluid and membranes, third trimester, not applicable or unspecifiedCMS: Oth disrd of amniotic fluid and membrns, third tri, unsp | Can lead a claim | A | None |
| O41.8X31 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 1CMS: Oth disrd of amniotic fluid and membrns, third tri, fetus 1 | Can lead a claim | A | None |
| O41.8X32 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 2CMS: Oth disrd of amniotic fluid and membrns, third tri, fetus 2 | Can lead a claim | A | None |
| O41.8X33 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 3CMS: Oth disrd of amniotic fluid and membrns, third tri, fetus 3 | Can lead a claim | A | None |
| O41.8X34 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 4CMS: Oth disrd of amniotic fluid and membrns, third tri, fetus 4 | Can lead a claim | A | None |
| O41.8X35 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 5CMS: Oth disrd of amniotic fluid and membrns, third tri, fetus 5 | Can lead a claim | A | None |
| O41.8X39 | Other specified disorders of amniotic fluid and membranes, third trimester, other fetusCMS: Oth disrd of amniotic fluid and membrns, third tri, oth | Can lead a claim | A | None |
| O41.8X9 Other specified disorders of amniotic fluid and membranes, unspecified trimester | ||||
| O41.8X90 | Other specified disorders of amniotic fluid and membranes, unspecified trimester, not applicable or unspecifiedCMS: Oth disrd of amniotic fluid and membrns, unsp tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.8X91 | Other specified disorders of amniotic fluid and membranes, unspecified trimester, fetus 1CMS: Oth disrd of amniotic fluid and membrns, unsp tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.8X92 | Other specified disorders of amniotic fluid and membranes, unspecified trimester, fetus 2CMS: Oth disrd of amniotic fluid and membrns, unsp tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.8X93 | Other specified disorders of amniotic fluid and membranes, unspecified trimester, fetus 3CMS: Oth disrd of amniotic fluid and membrns, unsp tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.8X94 | Other specified disorders of amniotic fluid and membranes, unspecified trimester, fetus 4CMS: Oth disrd of amniotic fluid and membrns, unsp tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.8X95 | Other specified disorders of amniotic fluid and membranes, unspecified trimester, fetus 5CMS: Oth disrd of amniotic fluid and membrns, unsp tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.8X99 | Other specified disorders of amniotic fluid and membranes, unspecified trimester, other fetusCMS: Oth disrd of amniotic fluid and membrns, unsp trimester, oth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.9 Disorder of amniotic fluid and membranes, unspecified | ||||
| O41.90 Disorder of amniotic fluid and membranes, unspecified, unspecified trimester | ||||
| O41.90X0 | Disorder of amniotic fluid and membranes, unspecified, unspecified trimester, not applicable or unspecifiedCMS: Disorder of amniotic fluid and membrns, unsp, unsp tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.90X1 | Disorder of amniotic fluid and membranes, unspecified, unspecified trimester, fetus 1CMS: Disorder of amnio fluid and membrns, unsp, unsp tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.90X2 | Disorder of amniotic fluid and membranes, unspecified, unspecified trimester, fetus 2CMS: Disorder of amnio fluid and membrns, unsp, unsp tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.90X3 | Disorder of amniotic fluid and membranes, unspecified, unspecified trimester, fetus 3CMS: Disorder of amnio fluid and membrns, unsp, unsp tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.90X4 | Disorder of amniotic fluid and membranes, unspecified, unspecified trimester, fetus 4CMS: Disorder of amnio fluid and membrns, unsp, unsp tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.90X5 | Disorder of amniotic fluid and membranes, unspecified, unspecified trimester, fetus 5CMS: Disorder of amnio fluid and membrns, unsp, unsp tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.90X9 | Disorder of amniotic fluid and membranes, unspecified, unspecified trimester, other fetusCMS: Disorder of amniotic fluid and membrns, unsp, unsp tri, oth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.91 Disorder of amniotic fluid and membranes, unspecified, first trimester | ||||
| O41.91X0 | Disorder of amniotic fluid and membranes, unspecified, first trimester, not applicable or unspecifiedCMS: Disorder of amnio fluid and membrns, unsp, first tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.91X1 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 1CMS: Disord of amnio fluid and membrns, unsp, first tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.91X2 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 2CMS: Disord of amnio fluid and membrns, unsp, first tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.91X3 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 3CMS: Disord of amnio fluid and membrns, unsp, first tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.91X4 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 4CMS: Disord of amnio fluid and membrns, unsp, first tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.91X5 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 5CMS: Disord of amnio fluid and membrns, unsp, first tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.91X9 | Disorder of amniotic fluid and membranes, unspecified, first trimester, other fetusCMS: Disorder of amniotic fluid and membrns, unsp, first tri, oth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.92 Disorder of amniotic fluid and membranes, unspecified, second trimester | ||||
| O41.92X0 | Disorder of amniotic fluid and membranes, unspecified, second trimester, not applicable or unspecifiedCMS: Disorder of amnio fluid and membrns, unsp, second tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.92X1 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 1CMS: Disord of amnio fluid and membrns, unsp, second tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.92X2 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 2CMS: Disord of amnio fluid and membrns, unsp, second tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.92X3 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 3CMS: Disord of amnio fluid and membrns, unsp, second tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.92X4 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 4CMS: Disord of amnio fluid and membrns, unsp, second tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.92X5 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 5CMS: Disord of amnio fluid and membrns, unsp, second tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.92X9 | Disorder of amniotic fluid and membranes, unspecified, second trimester, other fetusCMS: Disorder of amnio fluid and membrns, unsp, second tri, oth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.93 Disorder of amniotic fluid and membranes, unspecified, third trimester | ||||
| O41.93X0 | Disorder of amniotic fluid and membranes, unspecified, third trimester, not applicable or unspecifiedCMS: Disorder of amnio fluid and membrns, unsp, third tri, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.93X1 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 1CMS: Disord of amnio fluid and membrns, unsp, third tri, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.93X2 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 2CMS: Disord of amnio fluid and membrns, unsp, third tri, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.93X3 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 3CMS: Disord of amnio fluid and membrns, unsp, third tri, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.93X4 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 4CMS: Disord of amnio fluid and membrns, unsp, third tri, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.93X5 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 5CMS: Disord of amnio fluid and membrns, unsp, third tri, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O41.93X9 | Disorder of amniotic fluid and membranes, unspecified, third trimester, other fetusCMS: Disorder of amniotic fluid and membrns, unsp, third tri, oth | 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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