LOINCActiveObservation

LOINC Code 11889-3: Gestational age estimated from Abdominal circumference on US

11889-3 is a LOINC code used to identify Gestational age estimated from Abdominal circumference on US in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Gestational age. It is commonly used with the system or sample type ^Fetus.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Gestational age. It is commonly used with the system or sample type ^Fetus.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Observation
  • Method: US+Estimated from AC

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Gestational age estimated from Abdominal circumference on US
  • Gestational age
  • This term pertains only to the FETUS. Method Reference can be supplied by DICOM Supplement 23-Structured Reporting, Relationship Module (C.6.29).
  • Abdominal circumference; Echography; Est; estimation; Fetal; GA; Gest; Gestation; Gyn; Gynecology; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; predicted; Prenatal; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Gestational age estimated from Abdominal circumference on USGA from ACGestational ageOB.USTimePt^Fetus

Frequently asked questions

Code details

Code11889-3
SystemLOINC
Display nameGestational age estimated from Abdominal circumference on US
DescriptionGestational age
Short nameGA from AC
ComponentGestational age
PropertyTime
TimingPt
System (specimen)^Fetus
ScaleQn
MethodUS+Estimated from AC
ClassOB.US
Example unitsdays
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.52

Part names

Gestational ageTimePt^FetusQnUS+Estimated from ACTime (e.g. seconds)Point in time (spot)Ultrasound+Estimated from AC

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 11889-3 | HealthAssure