LOINCActiveObservation

LOINC Code 57377-4: Pyruvate 5 Min post Unsp challenge (Bld) [Mass/Vol]

57377-4 is a LOINC code used to identify Pyruvate 5 Min post Unsp challenge (Bld) [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 Pyruvate^5M post XXX challenge. It is commonly used with the system or sample type Bld.

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 Pyruvate^5M post XXX challenge. It is commonly used with the system or sample type Bld.

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

  • Pyruvate [Mass/volume] in Blood --5 minutes post XXX challenge
  • Pyruvate^5M post XXX challenge
  • 5M p chal; After; Blood; CHEMISTRY.CHALLENGE TESTING; Level; Mass concentration; p chal; Point in time; PST; Pyruvic acid; QNT; Quan; Quant; Quantitative; Random; WB; Whole blood

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

Pyruvate 5 Min post Unsp challenge (Bld) [Mass/Vol]Pyruvate [Mass/volume] in Blood --5 minutes post XXX challengePyruvate 5M p chal Bld-mCncPyruvate^5M post XXX challengeCHALPyruvate 5 min after challenge, BloodMCnc

Frequently asked questions

Code details

Code57377-4
SystemLOINC
Display namePyruvate 5 Min post Unsp challenge (Bld) [Mass/Vol]
DescriptionPyruvate^5M post XXX challenge
Short namePyruvate 5M p chal Bld-mCnc
ComponentPyruvate^5M post XXX challenge
PropertyMCnc
TimingPt
System (specimen)Bld
ScaleQn
ClassCHAL
Example unitsmg/dL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.70

Consumer names

Pyruvate 5 min after challenge, Blood

Part names

Pyruvate^5M post XXX challengeMCncPtBldQnMass ConcentrationPoint in time (spot)Blood

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 57377-4 | HealthAssure