O28 vs R74.02
O28 (Abnormal findings on antenatal screening of mother) compared with R74.02 (Elevation of levels of lactic acid dehydrogenase [LDH]), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. R74.02 carries an Excludes2 note covering O28: “abnormal findings on antenatal screening of mother (O28.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| O28Abnormal findings on antenatal screening of mother | R74.02Elevation of levels of lactic acid dehydrogenase [LDH] | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Abnormal findings on antenatal screening of mother is a non-billable ICD-10-CM category code (O28). | Elevation of levels of lactic acid dehydrogenase [LDH] is a billable ICD-10-CM diagnosis code (R74.02). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources