LOINCActiveBoth

LOINC Code 631-2: Bacteria identified Aer cx Nom (Unknown substance)

631-2 is a LOINC code used to identify Bacteria identified Aer cx Nom (Unknown substance) 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 Bacteria. It is commonly used with the system or sample type Unk sub.

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 Bacteria. It is commonly used with the system or sample type Unk sub.

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
  • Method: Aerobic culture

What it does not mean

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

Key facts

  • Bacteria identified in Unknown substance by Aerobe culture
  • Bacteria
  • Aerobe; Aerobe Cult; Aerobed; Bact; C&S; Cult; Cultures; ID; Identity or presence; Infectious Disease; InfectiousDisease; Microbiology; Nominal; Point in time; Random; Unknown substance; Usub

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

Bacteria identified Aer cx Nom (Unknown substance)Bacteria identified in Unknown substance by Aerobe cultureBacteria Usub Aerobe CultBacteriaMICROBacterial culture, Unknown substancePrid

Frequently asked questions

Code details

Code631-2
SystemLOINC
Display nameBacteria identified Aer cx Nom (Unknown substance)
DescriptionBacteria
Short nameBacteria Usub Aerobe Cult
ComponentBacteria
PropertyPrid
TimingPt
System (specimen)Unk sub
ScaleNom
MethodAerobic culture
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.78

Consumer names

Bacterial culture, Unknown substance

Part names

BacteriaPridPtUnk subNomAerobic culturePresence or IdentityPoint in time (spot)Unknown substanceAerobe culture

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 631-2 | HealthAssure