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 33140-5: Fetal Body weight estimated from Biparietal diameter and Fetal trunk area and Femur length on US by Osaka 1990 method

Name: LOINC Code 33140-5: Fetal Body weight estimated from Biparietal diameter and Fetal trunk area and Femur length on US by Osaka 1990 method
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:20.067Z

33140-5 is a LOINC code used to identify Fetal Body weight estimated from Biparietal diameter and Fetal trunk area and Femur length on US by Osaka 1990 method 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 Body weight. 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 Body weight. 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 BPD&FTA&FL.Osaka 1990

What it does not mean

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

Key facts

Fetal Body weight estimated from Biparietal diameter and Fetal trunk area and Femur length on US by Osaka 1990 method
Body weight
90; Bdy weight; Biparietal diameter; bod; Bodies; Echography; EFW; Est; Estimated fetal weight; estimation; Femur Length; Fetal; Fetal Trunk Area; from BPD&FTA&FL.Osaka90; Gyn; Gynecology; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; predicted; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Wt

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 Body weight estimated from Biparietal diameter and Fetal trunk area and Femur length on US by Osaka 1990 methodEFW from BPD&FTA&FL.Osaka90Body weightOB.USMassPt^Fetus

Frequently asked questions

Code details

Code33140-5

SystemLOINC

Display nameFetal Body weight estimated from Biparietal diameter and Fetal trunk area and Femur length on US by Osaka 1990 method

DescriptionBody weight

Short nameEFW from BPD&FTA&FL.Osaka90

ComponentBody weight

PropertyMass

TimingPt

System (specimen)^Fetus

ScaleQn

MethodUS+Estimated from BPD&FTA&FL.Osaka 1990

ClassOB.US

Example unitskg

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.09

Last changed2.70

Part names

Body weightMassPt^FetusQnUS+Estimated from BPD&FTA&FL.Osaka 1990Point in time (spot)Ultrasound+Estimated from BPDandFTAandFL.Osaka 1990

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.