Z36.88 ICD-10-CM Code: Encounter for antenatal screening for fetal macrosomia
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Factors influencing health status and contact with health services (Z00-Z99) / Persons encountering health services in circumstances related to reproduction (Z30-Z39)
Z36.88
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceEncounter for antenatal screening for fetal macrosomia
A prenatal screening visit where ultrasound or other tests are performed to check if the baby is larger than expected for the gestational age.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
Official- Screening for large-for-dates
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Z36.88 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z36.88 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z36.88 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z36.88 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z36.88 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z36.88 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is Z36.88 an HCC code?
No. Z36.88 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Z36.88 is the ICD-10-CM diagnosis code for encounter for antenatal screening for fetal macrosomia. A prenatal screening visit where ultrasound or other tests are performed to check if the baby is larger than expected for the gestational age. Z36.88 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering persons encountering health services in circumstances related to reproduction (z30-z39).
Z36.88 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Document the estimated fetal weight and percentile for gestational age; often associated with maternal diabetes.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z36.88 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the estimated fetal weight and percentile for gestational age; often associated with maternal diabetes
- •Link with maternal diabetes codes if present, as this is a common indication for fetal macrosomia screening