Ultrasonography of Third Trimester, Single Fetus

ValidICD-10-PCS procedure code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2014 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2014 Added to the draft code set draft Ultrasonography of Third Trimester, Single Fetus

What this code says

Each character is read in its own position, so the same letter means different things in different places. Definitions are CMS's own.

3. Root operation Ultrasonography

Real time display of images of anatomy or flow information developed from the capture of reflected and attenuated high frequency sound waves

Codes in the same group

Code	Description	Status
BY47ZZZ	Ultrasonography of Fetal Umbilical Cord	Valid
BY48ZZZ	Ultrasonography of Placenta	Valid
BY49ZZZ	Ultrasonography of First Trimester, Single Fetus	Valid
BY4BZZZ	Ultrasonography of First Trimester, Multiple Gestation	Valid
BY4CZZZ	Ultrasonography of Second Trimester, Single Fetus	Valid
BY4DZZZ	Ultrasonography of Second Trimester, Multiple Gestation	Valid
BY4GZZZ	Ultrasonography of Third Trimester, Multiple Gestation	Valid

At a glance

Code: BY4FZZZ
System: ICD-10-PCS
Status: Valid
Valid: FY2016 onwards
In the code set: FY2016 onwards
Part of: BY4

Where this code sits

Section B Imaging
Body system BY Fetus and Obstetrical
Category BY4 Imaging, Fetus and Obstetrical, Ultrasonography
This code BY4FZZZ Ultrasonography of Third Trimester, Single Fetus

What each character means

B Section Imaging
Y Body system Fetus and Obstetrical
4 Root operation Ultrasonography
F Body Part Third Trimester, Single Fetus
Z Contrast None
Z Qualifier None
Z Qualifier None

Source

ICD-10-PCS FY2027 code set, published by the Centers for Medicare and Medicaid Services (CMS).

Effective October 1, 2026.

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