LOINCActiveObservation

LOINC Code 43999-2: HCG (Amn fld) [MoM]

43999-2 is a LOINC code used to identify HCG (Amn fld) [MoM] 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 Choriogonadotropin. It is commonly used with the system or sample type Amnio fld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Choriogonadotropin. It is commonly used with the system or sample type Amnio fld.

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

What it does not mean

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

Key facts

  • Choriogonadotropin [Multiple of the median] in Amniotic fluid
  • Choriogonadotropin
  • AF; Amn; Amn fl; Amnio; Amniotic flu; Amniotic fluid; CG; Chemistry; Choriogonadotropins total; Chorionic gonadotropin; HCG; Human chorionic gonadotropin; MoM; Multiple of the median; Point in time; QNT; Quan; Quant; Quantitative; Random

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

HCG (Amn fld) [MoM]Choriogonadotropin [Multiple of the median] in Amniotic fluidHCG MoM AmnChoriogonadotropinCHEMHCG, Amniotic fluidMoM

Frequently asked questions

Code details

Code43999-2
SystemLOINC
Display nameHCG (Amn fld) [MoM]
DescriptionChoriogonadotropin
Short nameHCG MoM Amn
ComponentChoriogonadotropin
PropertyMoM
TimingPt
System (specimen)Amnio fld
ScaleQn
ClassCHEM
Example unitsM.o.M
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.17
Last changed2.42

Consumer names

HCG, Amniotic fluid

Part names

ChoriogonadotropinMoMPtAmnio fldQnMultiple of the medianPoint in time (spot)Amniotic fluid

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 43999-2 | HealthAssure