What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 33181-9: Fetal Cerebellum Diameter transverse estimated from gestational age by method of Goldstein 1987 (US)

Name: LOINC Code 33181-9: Fetal Cerebellum Diameter transverse estimated from gestational age by method of Goldstein 1987 (US)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:20.067Z

33181-9 is a LOINC code used to identify Fetal Cerebellum Diameter transverse estimated from gestational age by method of Goldstein 1987 (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 Diameter.transverse. It is commonly used with the system or sample type Cerebellum^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 Diameter.transverse. It is commonly used with the system or sample type Cerebellum^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 Goldstein 1987

What it does not mean

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

Key facts

Fetal Cerebellum Diameter transverse estimated from gestational age by method of Goldstein 1987 (US)
Diameter.transverse
87; cerebellar; DIA; Diam; Diam transverse; Echography; Est; estimation; Fetal; from GA.Goldstein87; Gyn; Gynecology; Length; Neuro; Neurology; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; predicted; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; TCD; Transcerebellar diameter; ULS; Ultrasound; US+est

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

Fetal Cerebellum Diameter transverse estimated from gestational age by method of Goldstein 1987 (US)Fetal TCD from GA.Goldstein87Diameter.transverseOB.USLenPtCerebellum^Fetus

Frequently asked questions

Code details

Code33181-9

SystemLOINC

Display nameFetal Cerebellum Diameter transverse estimated from gestational age by method of Goldstein 1987 (US)

DescriptionDiameter.transverse

Short nameFetal TCD from GA.Goldstein87

ComponentDiameter.transverse

PropertyLen

TimingPt

System (specimen)Cerebellum^Fetus

ScaleQn

MethodUS.estimated from Goldstein 1987

ClassOB.US

Example unitsmm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.09

Last changed2.70

Part names

Diameter.transverseLenPtCerebellum^FetusQnUS.estimated from Goldstein 1987LengthPoint in time (spot)Ultrasound.estimated from Goldstein 1987

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.