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.

LOINCActiveBoth

LOINC Code 49576-2: Phosphatidylethanolamine/Total surfactant (Amn fld) [Mass fraction]

Name: LOINC Code 49576-2: Phosphatidylethanolamine/Total surfactant (Amn fld) [Mass fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

49576-2 is a LOINC code used to identify Phosphatidylethanolamine/Total surfactant (Amn fld) [Mass fraction] 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 Phosphatidylethanolamine/Surfactants.total. 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 Phosphatidylethanolamine/Surfactants.total. 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: Both

What it does not mean

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

Key facts

Phosphatidylethanolamine/Surfactants.total in Amniotic fluid
Phosphatidylethanolamine/Surfactants.total
AF; Amn; Amn fl; Amnio; Amniotic flu; Amniotic fluid; Chemistry; Mass Fraction; PE; Percent; Phosphatidyl ethanolamine; Point in time; QNT; Quan; Quant; Quantitative; Random; Tot; Totl

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Phosphatidylethanolamine/Total surfactant (Amn fld) [Mass fraction] (49576-2)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Phosphatidylethanolamine/Total surfactant (Amn fld) [Mass fraction]Phosphatidylethanolamine/Surfactants.total in Amniotic fluidPE MFr AmnPhosphatidylethanolamine/Surfactants.totalCHEMPhosphatidylethanolamine/Surfactants.total, Amniotic fluidMFr

Frequently asked questions

Code details

Code49576-2

SystemLOINC

Display namePhosphatidylethanolamine/Total surfactant (Amn fld) [Mass fraction]

DescriptionPhosphatidylethanolamine/Surfactants.total

Short namePE MFr Amn

ComponentPhosphatidylethanolamine/Surfactants.total

PropertyMFr

TimingPt

System (specimen)Amnio fld

ScaleQn

ClassCHEM

Example units%

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.70

Consumer names

Phosphatidylethanolamine/Surfactants.total, Amniotic fluid

Part names

Phosphatidylethanolamine/Surfactants.totalMFrPtAmnio fldQnMass fractionPoint 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.