Z36 – Encounter for antenatal screening of mother

ICD-10-CM 2027 diagnosis code · Persons encountering health services in circumstances related to reproduction

Non-billable header

ICD-10-CM code Z36

Code: Z36 (claims format: Z36)
Description: Encounter for antenatal screening of mother
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z30-Z39 Persons encountering health services in circumstances related to reproduction

Billable codes under Z36

Z36 is a header code and cannot be used on claims. Choose the most specific code:

Z36.0 – Encounter for antenatal screening for chromosomal anomaliesBillable
Z36.1 – Encounter for antenatal screening for raised alphafetoprotein levelBillable
Z36.2 – Encounter for other antenatal screening follow-upBillable
Z36.3 – Encounter for antenatal screening for malformationsBillable
Z36.4 – Encounter for antenatal screening for fetal growth retardationBillable
Z36.5 – Encounter for antenatal screening for isoimmunizationBillable
Z36.8 – Encounter for other antenatal screeningHeader (more codes below)
Z36.9 – Encounter for antenatal screening, unspecifiedBillable

Notes for Z36

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.

Excludes1 (not coded here):

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

Excludes2 (not included here):

abnormal findings on antenatal screening of mother (O28.-)
genetic counseling and testing (Z31.43-, Z31.5)
routine prenatal care (Z34)

Frequently asked questions

What is ICD-10 code Z36?

Z36 is the ICD-10-CM code for encounter for antenatal screening of mother, in the block Z30-Z39 (Persons encountering health services in circumstances related to reproduction).

Is Z36 a billable code?

No. Z36 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.