LOINCActiveObservation

LOINC Code 51517-1: LDH 4 Elph (Periton fld) [Catalytic fraction]

51517-1 is a LOINC code used to identify LDH 4 Elph (Periton fld) [Catalytic fraction] 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 Lactate dehydrogenase 4/Lactate dehydrogenase.total. It is commonly used with the system or sample type Periton fld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Lactate dehydrogenase 4/Lactate dehydrogenase.total. It is commonly used with the system or sample type Periton fld.

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
  • Method: Electrophoresis

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Lactate dehydrogenase 4/Lactate dehydrogenase.total in Peritoneal fluid by Electrophoresis
  • Lactate dehydrogenase 4/Lactate dehydrogenase.total
  • 2-Hydroxypropanoic acid; 2-hydroxy-propionate; 2-hydroxy-propionic acid; Ascites; Ascitic fluid; Ascitis; Catalytic Fraction; Chemistry; Dehydrog; Dehyrdogenase; Elec; Elect; Electr; Electro; Electrophhrs; Electrophrs; Elp; Elph; Ep; L.D.H; Lact; Lactate dehydrogenase.fraction 4; Lactic acid; Lactic acid dehydrogenase; LD; LD4; LDH; LDH isoenzyme 4; LDH4; L-lactate; L-lactate dehydrogenase; Percent; Peritoneal fluid; Point in time; Prt; QNT; Quan; Quant; Quantitative; Random; Tot; Totl; Tumor marker

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

LDH 4 Elph (Periton fld) [Catalytic fraction]Lactate dehydrogenase 4/Lactate dehydrogenase.total in Peritoneal fluid by ElectrophoresisLDH4 CFr Prt ElphLactate dehydrogenase 4/Lactate dehydrogenase.totalCHEMLDH 4, Peritoneal fluidCFr

Frequently asked questions

Code details

Code51517-1
SystemLOINC
Display nameLDH 4 Elph (Periton fld) [Catalytic fraction]
DescriptionLactate dehydrogenase 4/Lactate dehydrogenase.total
Short nameLDH4 CFr Prt Elph
ComponentLactate dehydrogenase 4/Lactate dehydrogenase.total
PropertyCFr
TimingPt
System (specimen)Periton fld
ScaleQn
MethodElectrophoresis
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.70

Consumer names

LDH 4, Peritoneal fluid

Part names

Lactate dehydrogenase 4/Lactate dehydrogenase.totalCFrPtPeriton fldQnElectrophoresisCatalytic FractionPoint in time (spot)Peritoneal fluid

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 51517-1 | HealthAssure