LOINCActiveObservation

LOINC Code 11833-1: Fetal Amniotic fluid space Mean diameter largest pocket US

11833-1 is a LOINC code used to identify Fetal Amniotic fluid space Mean diameter largest pocket 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.largest pocket.mean. It is commonly used with the system or sample type Am fld space^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.largest pocket.mean. It is commonly used with the system or sample type Am fld space^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.measured

What it does not mean

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

Key facts

  • Fetal Amniotic fluid space Mean diameter largest pocket US
  • Diameter.largest pocket.mean
  • Estimate of amniotic fluid volume made with sound path perpendicular to the surface of the uterus. The largest pocket of amniotic fluid free of umbilical cord is identified and the average of the vertical and two transverse diameters is recorded.
  • AF space; AF space^Fetus; Amniotic fluid; Average; Avg; DIA; Diam; Diam.lgst pct; Diam.lgst pct mean; Echography; Fetal; Gyn; Gynecology; Length; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; US+Meas

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 Amniotic fluid space Mean diameter largest pocket USFet AF space Diam.lgst pct mean US.measDiameter.largest pocket.meanOB.USLenPtAm fld space^fetus

Frequently asked questions

Code details

Code11833-1
SystemLOINC
Display nameFetal Amniotic fluid space Mean diameter largest pocket US
DescriptionDiameter.largest pocket.mean
Short nameFet AF space Diam.lgst pct mean US.meas
ComponentDiameter.largest pocket.mean
PropertyLen
TimingPt
System (specimen)Am fld space^Fetus
ScaleQn
MethodUS.measured
ClassOB.US
Example unitscm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Diameter.largest pocket.meanLenPtAm fld space^fetusQnUS.measuredLengthPoint in time (spot)Ultrasound.measured

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 11833-1 | HealthAssure