ICD-10 · PDGM grouping
O28 Abnormal findings on antenatal screening of mother
All 8 codes in the O28 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
8
Can lead a claim
0
Cannot lead a claim
8
What CMS assigns to O28
None of the 8 codes is assigned a clinical group. None of the 8 is assigned a comorbidity subgroup. None can lead a claim.
Every code in O28
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 |
|---|---|---|---|---|
| O28.0 | Abnormal hematological finding on antenatal screening of motherCMS: Abnormal hematolog finding on antenatal screening of mother | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O28.1 | Abnormal biochemical finding on antenatal screening of motherCMS: Abnormal biochemical finding on antenat screening of mother | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O28.2 | Abnormal cytological finding on antenatal screening of motherCMS: Abnormal cytolog finding on antenatal screening of mother | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O28.3 | Abnormal ultrasonic finding on antenatal screening of mother | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O28.4 | Abnormal radiological finding on antenatal screening of motherCMS: Abnormal radiolog finding on antenatal screening of mother | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O28.5 | Abnormal chromosomal and genetic finding on antenatal screening of motherCMS: Abn chromsoml and genetic find on antenat screen of mother | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O28.8 | Other abnormal findings on antenatal screening of mother | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O28.9 | Unspecified abnormal findings on antenatal screening of motherCMS: Unsp abnormal findings on antenatal screening of mother | 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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