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 1585-9: Lactose pre 12 hour fast [Mass/Vol]

Name: LOINC Code 1585-9: Lactose pre 12 hour fast [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:25.874Z

1585-9 is a LOINC code used to identify Lactose pre 12 hour 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 12H 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 12H 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: Both

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 12 hour fast
Lactose^pre 12H CFst
Before; Calorie Fast; CHEMISTRY.CHALLENGE TESTING; Fast; Fasting; Level; LTT; Mass concentration; PC; Pl; Plasma; Plsm; Point in time; pre 12h 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 12 hour fast [Mass/Vol]Lactose [Mass/volume] in Serum or Plasma --pre 12 hour fastLactose pre 12h fast SerPl-mCncLactose^pre 12H CFstCHALLactose before 12 Hour Fast, BloodMCnc

Frequently asked questions

Code details

Code1585-9

SystemLOINC

Display nameLactose pre 12 hour fast [Mass/Vol]

DescriptionLactose^pre 12H CFst

Short nameLactose pre 12h fast SerPl-mCnc

ComponentLactose^pre 12H CFst

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsmg/dL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.34

Consumer names

Lactose before 12 Hour Fast, Blood

Part names

Lactose^pre 12H 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.