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 41605-7: Lactose pre fast [Mass/Vol]

Name: LOINC Code 41605-7: Lactose pre fast [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.680Z

41605-7 is a LOINC code used to identify Lactose pre fast [Mass/Vol] 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 Lactose^pre CFst. It is commonly used with the system or sample type Ser/Plas.

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 Lactose^pre CFst. It is commonly used with the system or sample type Ser/Plas.

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

Lactose [Mass/volume] in Serum or Plasma --pre fast
Lactose^pre CFst
Before; Calorie Fast; CHEMISTRY.CHALLENGE TESTING; Fast; Fasting; Level; LTT; Mass concentration; PC; Pl; Plasma; Plsm; Point in time; Pre fast; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

Lactose pre fast [Mass/Vol]Lactose [Mass/volume] in Serum or Plasma --pre fastLactose Pre fast SerPl-mCncLactose^pre CFstCHALLactose before Fast, BloodMCnc

Frequently asked questions

Code details

Code41605-7

SystemLOINC

Display nameLactose pre fast [Mass/Vol]

DescriptionLactose^pre CFst

Short nameLactose Pre fast SerPl-mCnc

ComponentLactose^pre CFst

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsmg/dL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.73

Consumer names

Lactose before Fast, Blood

Part names

Lactose^pre CFstMCncPtSer/PlasQnMass ConcentrationPoint in time (spot)Serum or Plasma

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.