LOINCActiveObservation

LOINC Code 97549-0: SaO2% (BldCV) [Mass fraction]

97549-0 is a LOINC code used to identify SaO2% (BldCV) [Mass 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 Oxygen saturation. It is commonly used with the system or sample type BldCV.

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 Oxygen saturation. It is commonly used with the system or sample type BldCV.

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

What it does not mean

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

Key facts

  • Oxygen saturation in Central venous blood
  • Oxygen saturation
  • Chemistry; Lung; Mass fraction; O2; Percent; Point in time; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; SaO2; SAT; Satn; SO2; tO2

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

SaO2% (BldCV) [Mass fraction]Oxygen saturation in Central venous bloodSaO2 % BldCVOxygen saturationCHEMSaO2%, BloodMFr

Frequently asked questions

Code details

Code97549-0
SystemLOINC
Display nameSaO2% (BldCV) [Mass fraction]
DescriptionOxygen saturation
Short nameSaO2 % BldCV
ComponentOxygen saturation
PropertyMFr
TimingPt
System (specimen)BldCV
ScaleQn
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

SaO2%, Blood

Part names

Oxygen saturationMFrPtBldCVQnMass fractionPoint in time (spot)Blood central venous

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 97549-0 | HealthAssure