LOINCActiveBoth

LOINC Code 53445-3: Carnitine palmitoyltransferase 2/Citrate synthase (Fibroblast) [Catalytic ratio]

53445-3 is a LOINC code used to identify Carnitine palmitoyltransferase 2/Citrate synthase (Fibroblast) [Catalytic ratio] 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 Carnitine palmitoyltransferase 2/Citrate synthase. It is commonly used with the system or sample type Fibroblasts.

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 Carnitine palmitoyltransferase 2/Citrate synthase. It is commonly used with the system or sample type Fibroblasts.

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

  • Carnitine palmitoyltransferase 2/Citrate synthase [Enzymatic activity ratio] in Fibroblast
  • Carnitine palmitoyltransferase 2/Citrate synthase
  • Carnitine acyltransferase II; Carnitine.total; Catalytic Concentration Ratio; Catalytic Ratio; CCrto; Chemistry; Cit Syn; Citric acid; CPT; CPT II; CPT2; Enzymatic activity ratio; Fib; Fibr; II; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Carnitine palmitoyltransferase 2/Citrate synthase (Fibroblast) [Catalytic ratio]Carnitine palmitoyltransferase 2/Citrate synthase [Enzymatic activity ratio] in FibroblastCPT2/Cit Syn Fib-cRtoCarnitine palmitoyltransferase 2/Citrate synthaseCHEMCarnitine palmitoyltransferase 2/Citrate Synthase, FibroblastCRto

Frequently asked questions

Code details

Code53445-3
SystemLOINC
Display nameCarnitine palmitoyltransferase 2/Citrate synthase (Fibroblast) [Catalytic ratio]
DescriptionCarnitine palmitoyltransferase 2/Citrate synthase
Short nameCPT2/Cit Syn Fib-cRto
ComponentCarnitine palmitoyltransferase 2/Citrate synthase
PropertyCRto
TimingPt
System (specimen)Fibroblasts
ScaleQn
ClassCHEM
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.26
Last changed2.48

Consumer names

Carnitine palmitoyltransferase 2/Citrate Synthase, Fibroblast

Part names

Carnitine palmitoyltransferase 2/Citrate synthaseCRtoPtFibroblastsQnCatalytic RatioPoint in time (spot)Fibroblast

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.