LOINCActiveBoth

LOINC Code 55968-2: pH (Total parental nutrition)

55968-2 is a LOINC code used to identify pH (Total parental nutrition) 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 pH. It is commonly used with the system or sample type TPN.

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 pH. It is commonly used with the system or sample type TPN.

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

  • pH of Total parental nutrition
  • pH
  • Chemistry; Log molar concentration; Point in time; Random; SmQn; Total parental nutrition

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

pH (Total parental nutrition)pH of Total parental nutritionpH TPNpHCHEMpH, Total parental nutritionLsCnc

Frequently asked questions

Code details

Code55968-2
SystemLOINC
Display namepH (Total parental nutrition)
DescriptionpH
Short namepH TPN
ComponentpH
PropertyLsCnc
TimingPt
System (specimen)TPN
ScaleSemiQn
ClassCHEM
Example unitspH
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.75

Consumer names

pH, Total parental nutrition

Part names

pHLsCncPtTPNSemiQnLog molar concentrationPoint in time (spot)Total parental nutrition

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 55968-2 | HealthAssure