What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 80830-3: pH (Lower resp)

Name: LOINC Code 80830-3: pH (Lower resp)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

80830-3 is a LOINC code used to identify pH (Lower resp) 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 Respiratory system specimen.lower.

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 pH. It is commonly used with the system or sample type Respiratory system specimen.lower.

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 Lower respiratory specimen
pH
Breathing; Chemistry; Log molar concentration; Low; Lower resp; Lungs; Point in time; Random; RS; SmQn; Spec

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for pH (Lower resp) (80830-3)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

pH (Lower resp)pH of Lower respiratory specimenpH Lower resppHCHEMpH, Lower respiratoryLsCnc

Frequently asked questions

Code details

Code80830-3

SystemLOINC

Display namepH (Lower resp)

DescriptionpH

Short namepH Lower resp

ComponentpH

PropertyLsCnc

TimingPt

System (specimen)Respiratory system specimen.lower

ScaleSemiQn

ClassCHEM

Example unitspH

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.56

Last changed2.77

Consumer names

pH, Lower respiratory

Part names

pHLsCncPtRespiratory system specimen.lowerSemiQnLog molar concentrationPoint in time (spot)Lower respiratory specimen

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.