DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

O28 Abnormal findings on antenatal screening of mother

  • Header · not billable

O28 is not billable. The category heads 8 billable codes in FY2027: the 8 codes directly below it.

Index → code

  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of mother → O28.9
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of mothergenetic → O28.5
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of motherultrasonic → O28.3

Where it sits

  1. Chapter 15 Pregnancy, childbirth and the puerperium (O00-O9A)
  2. O20-O29 Other maternal disorders predominantly related to pregnancy (O20-O29)
  3. O28 Abnormal findings on antenatal screening of mother
Billable codes
8
Subdivisions
8
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
18

Codes in O28

  1. O28.0
    Abnormal hematological finding on antenatal screening of mother
    Billable
  2. O28.1
    Abnormal biochemical finding on antenatal screening of mother
    Billable
  3. O28.2
    Abnormal cytological finding on antenatal screening of mother
    Billable
  4. O28.3
    Abnormal ultrasonic finding on antenatal screening of mother
    Billable
  5. O28.4
    Abnormal radiological finding on antenatal screening of mother
    Billable
  6. O28.5
    Abnormal chromosomal and genetic finding on antenatal screening of mother
    Billable
  7. O28.8
    Other abnormal findings on antenatal screening of mother
    Billable
  8. O28.9
    Unspecified abnormal findings on antenatal screening of mother
    Billable

Sources of each column.

Instructions

At O28

Excludes1

  • diagnostic findings classified elsewhere - see Alphabetical Index

Notes that also apply

Block O20-O29 instructions (Excludes2 2): printed on the block page.

Chapter 15 instructions (Notes 6, Excludes1 1, Excludes2 4, Use additional code 1): printed on the chapter 15 page.

Index entries

  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of mother → O28.9
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of motherhematological → O28.0
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of motherbiochemical → O28.1
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of mothercytological → O28.2
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of motherultrasonic → O28.3
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of motherradiological → O28.4
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of motherchromosomal → O28.5
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of mothergenetic → O28.5
  • Findings, abnormal, inconclusive, without diagnosisantenatal screening of motherspecified NEC → O28.8
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of mother → O28.9
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of motherhematological → O28.0
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of motherbiochemical → O28.1
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of mothercytological → O28.2
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of motherultrasonic → O28.3
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of motherradiological → O28.4
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of motherchromosomal → O28.5
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of mothergenetic → O28.5
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abnormal, abnormalityfindings on antenatal screening of motherspecified NEC → O28.8

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy