LOINCActiveBoth

LOINC Code 74575-2: Pyruvate dehydrogenase E1 (Tiss) [Catalytic activity/Mass]

74575-2 is a LOINC code used to identify Pyruvate dehydrogenase E1 (Tiss) [Catalytic activity/Mass] 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 dehydrogenase E1. It is commonly used with the system or sample type Tiss.

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 dehydrogenase E1. It is commonly used with the system or sample type Tiss.

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

  • Pyruvate dehydrogenase E1 [Enzymatic activity/mass] in Tissue
  • Pyruvate dehydrogenase E1
  • Catalytic Content; Chemistry; Dehydrog; Dehyrdogenase; PDH; PDH E1; Point in time; Pyruvic acid; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified

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 dehydrogenase E1 (Tiss) [Catalytic activity/Mass]Pyruvate dehydrogenase E1 [Enzymatic activity/mass] in TissuePDH E1 Tiss-cCntPyruvate dehydrogenase E1CHEMPyruvate Dehydrogenase E1, TissueCCnt

Frequently asked questions

Code details

Code74575-2
SystemLOINC
Display namePyruvate dehydrogenase E1 (Tiss) [Catalytic activity/Mass]
DescriptionPyruvate dehydrogenase E1
Short namePDH E1 Tiss-cCnt
ComponentPyruvate dehydrogenase E1
PropertyCCnt
TimingPt
System (specimen)Tiss
ScaleQn
ClassCHEM
Example unitsnmol/min/mg protein
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Pyruvate Dehydrogenase E1, Tissue

Part names

Pyruvate dehydrogenase E1CCntPtTissQnCatalytic ContentPoint in time (spot)Tissue and Smears

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 74575-2 | HealthAssure