O28Abnormal findings on antenatal screening of mother

O28 is the ICD-10-CM diagnosis code for abnormal findings on antenatal screening of mother. It belongs to block O20-O29 (other maternal disorders predominantly related to pregnancy) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: O28.0 (mother), O28.1 (mother), O28.2 (mother), O28.3 (mother), O28.4 (mother), O28.5 (mother), O28.8 (mother) and O28.9 (mother).

Don't report O28 together with the conditions in its Excludes1 note: diagnostic findings classified elsewhere - see Alphabetical Index.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.