ICD-10-CM Codes
O00-O9A Pregnancy, childbirth and the puerperium
O20-O29 Other maternal disorders predominantly related to pregnancy
O28- Abnormal findings on antenatal screening of mother
2020 ICD-10-CM Diagnosis Code O28

2020 ICD-10-CM Diagnosis Code O28

Abnormal findings on antenatal screening of mother

2016

2017

2018

2019

2020

Non-Billable/Non-Specific Code

O28 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2020 edition of ICD-10-CM O28 became effective on October 1, 2019.
This is the American ICD-10-CM version of O28 - other international versions of ICD-10 O28 may differ.

Type 1 Excludes

Type 1 Excludes Help

A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as O28. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

diagnostic findings classified elsewhere - see Alphabetical Index

The following code(s) above O28 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to O28:

O00-O9A
2020 ICD-10-CM Range O00-O9A
Pregnancy, childbirth and the puerperium
Note
- 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
Type 1 Excludes
- supervision of normal pregnancy (Z34.-)
Type 2 Excludes
- 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
- code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Pregnancy, childbirth and the puerperium
O20-O29
2020 ICD-10-CM Range O20-O29
Other maternal disorders predominantly related to pregnancy
Type 2 Excludes
- 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)
Other maternal disorders predominantly related to pregnancy

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change

Code annotations containing back-references to O28:

Type 2 Excludes: Z36

ICD-10-CM Diagnosis Code Z36
Encounter for antenatal screening of mother
Includes
- Encounter for placental sample (taken vaginally)
- Screening is the testing for disease or disease precursors in asymptomatic individuals so that early detection and treatment can be provided for those who test positive for the disease.
Type 1 Excludes
- diagnostic examination- code to sign or symptom
- encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
- suspected fetal condition affecting management of pregnancy - code to condition in Chapter 15
Type 2 Excludes
- abnormal findings on antenatal screening of mother (O28.-)
- genetic counseling and testing (Z31.43-, Z31.5)
- routine prenatal care (Z34)

ICD-10-CM Codes Adjacent To O28

O26.89 Other specified pregnancy related conditions

O26.891 …… first trimester

O26.892 …… second trimester

O26.893 …… third trimester

O26.899 …… unspecified trimester

O26.9 Pregnancy related conditions, unspecified

O26.90 …… unspecified trimester

O26.91 …… first trimester

O26.92 …… second trimester

O26.93 …… third trimester

O28 Abnormal findings on antenatal screening of mother

O28.0 Abnormal hematological finding on antenatal screening of mother

O28.1 Abnormal biochemical finding on antenatal screening of mother

O28.2 Abnormal cytological finding on antenatal screening of mother

O28.3 Abnormal ultrasonic finding on antenatal screening of mother

O28.4 Abnormal radiological finding on antenatal screening of mother

O28.5 Abnormal chromosomal and genetic finding on antenatal screening of mother

O28.8 Other abnormal findings on antenatal screening of mother

O28.9 Unspecified abnormal findings on antenatal screening of mother

O29 Complications of anesthesia during pregnancy

O29.0 Pulmonary complications of anesthesia during pregnancy

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2020 ICD-10-CM Diagnosis Code O28

Abnormal findings on antenatal screening of mother

Pregnancy, childbirth and the puerperium

Other maternal disorders predominantly related to pregnancy

Encounter for antenatal screening of mother