ICD-10 · PDGM grouping
O40 Polyhydramnios
All 28 codes in the O40 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
28
Can lead a claim
20
Cannot lead a claim
8
What CMS assigns to O40
20 of the 28 codes group to MMTA - Other; 8 are assigned no clinical group. None of the 28 is assigned a comorbidity subgroup. 20 of the 28 can lead a claim.
Every code in O40
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 |
|---|---|---|---|---|
| O40.1 Polyhydramnios, first trimester | ||||
| O40.1XX0 | Polyhydramnios, first trimester, not applicable or unspecifiedCMS: Polyhydramnios, first trimester, not applicable or unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O40.1XX1 | Polyhydramnios, first trimester, fetus 1 | Can lead a claim | A | None |
| O40.1XX2 | Polyhydramnios, first trimester, fetus 2 | Can lead a claim | A | None |
| O40.1XX3 | Polyhydramnios, first trimester, fetus 3 | Can lead a claim | A | None |
| O40.1XX4 | Polyhydramnios, first trimester, fetus 4 | Can lead a claim | A | None |
| O40.1XX5 | Polyhydramnios, first trimester, fetus 5 | Can lead a claim | A | None |
| O40.1XX9 | Polyhydramnios, first trimester, other fetus | Can lead a claim | A | None |
| O40.2 Polyhydramnios, second trimester | ||||
| O40.2XX0 | Polyhydramnios, second trimester, not applicable or unspecifiedCMS: Polyhydramnios, second trimester, not applicable or unsp | Can lead a claim | A | None |
| O40.2XX1 | Polyhydramnios, second trimester, fetus 1 | Can lead a claim | A | None |
| O40.2XX2 | Polyhydramnios, second trimester, fetus 2 | Can lead a claim | A | None |
| O40.2XX3 | Polyhydramnios, second trimester, fetus 3 | Can lead a claim | A | None |
| O40.2XX4 | Polyhydramnios, second trimester, fetus 4 | Can lead a claim | A | None |
| O40.2XX5 | Polyhydramnios, second trimester, fetus 5 | Can lead a claim | A | None |
| O40.2XX9 | Polyhydramnios, second trimester, other fetus | Can lead a claim | A | None |
| O40.3 Polyhydramnios, third trimester | ||||
| O40.3XX0 | Polyhydramnios, third trimester, not applicable or unspecifiedCMS: Polyhydramnios, third trimester, not applicable or unsp | Can lead a claim | A | None |
| O40.3XX1 | Polyhydramnios, third trimester, fetus 1 | Can lead a claim | A | None |
| O40.3XX2 | Polyhydramnios, third trimester, fetus 2 | Can lead a claim | A | None |
| O40.3XX3 | Polyhydramnios, third trimester, fetus 3 | Can lead a claim | A | None |
| O40.3XX4 | Polyhydramnios, third trimester, fetus 4 | Can lead a claim | A | None |
| O40.3XX5 | Polyhydramnios, third trimester, fetus 5 | Can lead a claim | A | None |
| O40.3XX9 | Polyhydramnios, third trimester, other fetus | Can lead a claim | A | None |
| O40.9 Polyhydramnios, unspecified trimester | ||||
| O40.9XX0 | Polyhydramnios, unspecified trimester, not applicable or unspecifiedCMS: Polyhydramnios, unsp trimester, not applicable or unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O40.9XX1 | Polyhydramnios, unspecified trimester, fetus 1 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O40.9XX2 | Polyhydramnios, unspecified trimester, fetus 2 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O40.9XX3 | Polyhydramnios, unspecified trimester, fetus 3 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O40.9XX4 | Polyhydramnios, unspecified trimester, fetus 4 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O40.9XX5 | Polyhydramnios, unspecified trimester, fetus 5 | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O40.9XX9 | Polyhydramnios, unspecified trimester, other fetus | 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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