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LOINC Code 67708-8: C3-DC+C4-OH (DBS) [Moles/Vol]

67708-8 is a LOINC code used to identify C3-DC+C4-OH (DBS) [Moles/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 Malonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH). It is commonly used with the system or sample type Bld.dot.

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 Malonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH). It is commonly used with the system or sample type Bld.dot.

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

Malonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH) [Moles/volume] in DBS
Malonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH)
This analyte is measured using the non-derivatized tandem mass spectrometry (MS/MS) method and is not measured when using the derivatized reagents. When using the derivatized reagents, it will instead be measured as the C3-DC+C8-OH analyte [LOINC53178-0]. A different LOINC code is used for the derivatized or non-derivatized method because based on the reagents used in processing, different sets of analytes become isobaric, which means that they cannot be distinguished on the MS/MS because they have the same molecular weight after reagent processing.
3-Hydroxy butyrylcarnitine; 3-hydroxybutylcarnitine; 3-hydroxy-butylcarnitine; 3OH-Butyrcarn; Blood; C3DC; C3-DC; C3DC+C4OH; C3-DC+C4-OH; C4OH; C4-OH; Chemistry; DBS; Dicarboxylic carnitine; Dried blood spot; Filter paper; FP; III; Level; Malonyl+3OHbutyrylcarn; nonderivatized; Point in time; QNT; Quan; Quant; Quantitative; Random; Substance concentration; underivatized; 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

C3-DC+C4-OH (DBS) [Moles/Vol]Malonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH) [Moles/volume] in DBSMalonyl+3OHbutyrylcarn DBS-sCncMalonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH)CHEMC3-DC+C4-OH, Dried blood spotSCnc

Frequently asked questions

Code details

Code67708-8
SystemLOINC
Display nameC3-DC+C4-OH (DBS) [Moles/Vol]
DescriptionMalonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH)
Short nameMalonyl+3OHbutyrylcarn DBS-sCnc
ComponentMalonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH)
PropertySCnc
TimingPt
System (specimen)Bld.dot
ScaleQn
ClassCHEM
Example unitsumol/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.38
Last changed2.73

Consumer names

C3-DC+C4-OH, Dried blood spot

Part names

Malonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH)SCncPtBld.dotQnSubstance ConcentrationPoint in time (spot)DBS

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 67708-8 | HealthAssure