ICD-10-CM 2027
ICD-10 code for antenatal screening encounter
Encounter for antenatal screening, unspecified
From the official ICD-10-CM alphabetic index entry “Encounter (with health service) (for) › antenatal screening”. Page updated September 29, 2026.
About coding antenatal screening encounter
The ICD-10-CM code for antenatal screening encounter is Z36.9 (Encounter for antenatal screening, unspecified). The official index lists 27 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Z36.9.
Within Z36, choose Z36.9 (antenatal screening, unspecified) only when documentation doesn't support a more specific option: antenatal screening for chromosomal anomalies (Z36.0), 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) and other antenatal screening (Z36.8).
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.
More specific antenatal screening encounter codes (official index)
- cervical length Z36.86 — Encounter for antenatal screening for cervical length
- chromosomal anomalies Z36.0 — Encounter for antenatal screening for chromosomal anomalies
- congenital cardiac abnormalities Z36.83 — Encounter for fetal screening for congenital cardiac abnormalities
- Down syndrome Z36.0 — Encounter for antenatal screening for chromosomal anomalies
- elevated maternal serum alphafetoprotein level Z36.1 — Encounter for antenatal screening for raised alphafetoprotein level
- fetal aneuploidy Z36.0 — Encounter for antenatal screening for chromosomal anomalies
- fetal growth retardation Z36.4 — Encounter for antenatal screening for fetal growth retardation
- fetal lung maturity Z36.84 — Encounter for antenatal screening for fetal lung maturity
- fetal macrosomia Z36.88 — Encounter for antenatal screening for fetal macrosomia
- hydrops fetalis Z36.81 — Encounter for antenatal screening for hydrops fetalis
- intrauterine growth restriction (IUGR)/small-for-dates Z36.4 — Encounter for antenatal screening for fetal growth retardation
- isoimmunization Z36.5 — Encounter for antenatal screening for isoimmunization
- large-for-dates Z36.88 — Encounter for antenatal screening for fetal macrosomia
- malformations Z36.3 — Encounter for antenatal screening for malformations
- non-visualized anatomy on a previous scan Z36.2 — Encounter for other antenatal screening follow-up
- nuchal translucency Z36.82 — Encounter for antenatal screening for nuchal translucency
- Patau syndrome Z36.0 — Encounter for antenatal screening for chromosomal anomalies
- raised alphafetoprotein level Z36.1 — Encounter for antenatal screening for raised alphafetoprotein level
- risk of pre-term labor Z36.86 — Encounter for antenatal screening for cervical length
- specified type NEC Z36.89 — Encounter for other specified antenatal screening
- specified follow-up NEC Z36.2 — Encounter for other antenatal screening follow-up
- specified genetic defects NEC Z36.8A — Encounter for antenatal screening for other genetic defects
- Streptococcus B Z36.85 — Encounter for antenatal screening for Streptococcus B
- suspected anomaly Z36.3 — Encounter for antenatal screening for malformations
- Trisomy 13 Z36.0 — Encounter for antenatal screening for chromosomal anomalies
- Trisomy 21 Z36.0 — Encounter for antenatal screening for chromosomal anomalies
- uncertain dates Z36.87 — Encounter for antenatal screening for uncertain dates
Common questions about antenatal screening encounter ICD-10 codes
What is the ICD-10 code for antenatal screening encounter?
- Z36.9 — Encounter for antenatal screening, unspecified. More specific codes apply when the documentation supports them: Z36.86, Z36.0, Z36.83, Z36.0 and others below.
What is the ICD-10 code for cervical length antenatal screening encounter?
- Z36.86 — Encounter for antenatal screening for cervical length.
What is the ICD-10 code for chromosomal anomalies antenatal screening encounter?
- Z36.0 — Encounter for antenatal screening for chromosomal anomalies.
What is the ICD-10 code for congenital cardiac abnormalities antenatal screening encounter?
- Z36.83 — Encounter for fetal screening for congenital cardiac abnormalities.
What is the ICD-10 code for down syndrome antenatal screening encounter?
- Z36.0 — Encounter for antenatal screening for chromosomal anomalies.
What is the ICD-10 code for fetal aneuploidy antenatal screening encounter?
- Z36.0 — Encounter for antenatal screening for chromosomal anomalies.
What is the ICD-10 code for fetal growth retardation antenatal screening encounter?
- Z36.4 — Encounter for antenatal screening for fetal growth retardation.
Is Z36.9 billable?
- Yes. Z36.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z36.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z36.9 as a principal diagnosis.
Is Z36.9 a CC or MCC?
- No. Z36.9 is neither a CC nor an MCC under MS-DRG v44.0.