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O28Non-billableSave

O28 - Abnormal findings on antenatal screening of mother

ICD-10-CM Chapter 15: Pregnancy, childbirth and the puerperium · O20-O29 Other maternal disorders predominantly related to pregnancy (O20-O29) · Top-level category · FY2027

Coding Guidance

O28 is a non-billable heading. Report one of the 8 more specific codes below.

Includes, Excludes and Coding Notes

Excludes 1 — Not Coded HereFrom O28

Mutually exclusive: these conditions are never reported together with this code.

  • diagnostic findings classified elsewhere - see Alphabetical Index
Excludes 2 — Not Included HereFrom O20-O29 Other maternal disorders predominantly related to pregnancy (O20-O29)

Not part of this code; report both codes when the patient has both conditions.

  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)
Excludes 1 — Not Coded HereFrom Chapter O00-O9A

Mutually exclusive: these conditions are never reported together with this code.

  • supervision of normal pregnancy (Z34.-)
Excludes 2 — Not Included HereFrom Chapter O00-O9A

Not part of this code; report both codes when the patient has both conditions.

  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)
Use Additional CodeFrom Chapter O00-O9A

Add a secondary code to identify the associated condition or cause when it is documented.

  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
NotesFrom Chapter O00-O9A

Instructional notes from the ICD-10-CM tabular list.

  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

More Specific Codes (8)

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

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with O28.