Z36.0Encounter for antenatal screening for chromosomal anomalies

Z36.0 is the ICD-10-CM diagnosis code for encounter for antenatal screening for chromosomal anomalies. It belongs to category Z36 (encounter for antenatal screening of mother), block Z30-Z39 (persons encountering health services in circumstances related to reproduction) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within Z36 (encounter for antenatal screening of mother), Z36.0 is specifically for encounter for antenatal screening for chromosomal anomalies. Related codes cover antenatal screening for raised alphafetoprotein level (Z36.1), other antenatal screening follow-up (Z36.2), antenatal screening for malformations (Z36.3), antenatal screening for fetal growth retardation (Z36.4), antenatal screening for isoimmunization (Z36.5), other antenatal screening (Z36.8) and antenatal screening, unspecified (Z36.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

The Medicare Code Editor treats this as a maternity diagnosis, expected only for patients age 9 through 64.

It is on the CMS list of diagnoses consistent only with female patients (the sex-conflict edit itself was retired in FY2025).

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It was added in FY2018, effective October 1, 2017.

Before ICD-10, this condition was coded in ICD-9-CM as V28.0 (antenatal screening for chromosomal anomalies by amniocentesis).