LOINCActiveObservation

LOINC Code 11771-3: [Percentile] Body weight.25th Estimated.pop birth wgt gestational age corr.ref

11771-3 is a LOINC code used to identify [Percentile] Body weight.25th Estimated.pop birth wgt gestational age corr.ref 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.25th. It is commonly used with the system or sample type ^Population distribution.

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.25th. It is commonly used with the system or sample type ^Population distribution.

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: Estimated.pop birth wgt gestational age corr.ref

What it does not mean

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

Key facts

  • [Percentile] Body weight.25th Estimated.pop birth wgt gestational age corr.ref
  • Body weight.25th
  • Reference value for fetal weight estimated from unspecified formula or table of 25th %-ile values of birth weight related to gestational age.
  • Bdy weight; Bdy weight.25th; bod; Bodies; Est; estimation; GA Corr; Gest; Gestation; Gyn; Gynecology; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Percentile; Point in time; Pop dist; Populat; Prenatal; QNT; Quan; Quant; Quantitative; Random; 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

[Percentile] Body weight.25th Estimated.pop birth wgt gestational age corr.ref[Prctl] Bdy weight.25th GA CorrBody weight.25thOB.USPrctlPt^Population distribution

Frequently asked questions

Code details

Code11771-3
SystemLOINC
Display name[Percentile] Body weight.25th Estimated.pop birth wgt gestational age corr.ref
DescriptionBody weight.25th
Short name[Prctl] Bdy weight.25th GA Corr
ComponentBody weight.25th
PropertyPrctl
TimingPt
System (specimen)^Population distribution
ScaleQn
MethodEstimated.pop birth wgt gestational age corr.ref
ClassOB.US
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.48

Part names

Body weight.25thPrctlPt^Population distributionQnEstimated.pop birth wgt gestational age corr.refPercentilePoint in time (spot)

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.