LOINCActiveObservation

LOINC Code 104500-4: Do sup(b) Ab [Titer]

104500-4 is a LOINC code used to identify Do sup(b) Ab [Titer] 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 D little o super little b Ab. It is commonly used with the system or sample type Ser/Plas.

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 D little o super little b Ab. It is commonly used with the system or sample type Ser/Plas.

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

  • Do sup(b) Ab [Titer] in Serum or Plasma
  • D little o super little b Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; BLOOD BANK; Dextro; Dilution factor; Dilution Factor (Titer); Do sup(b); Do^b; Dombrock; Dombrock Blood Group System; Pl; Plasma; Plsm; Point in time; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SmQn; SR; Titer; Titered; Titre; Ttr

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

Do sup(b) Ab [Titer]Do sup(b) Ab [Titer] in Serum or PlasmaDo sup(b) Ab Titr SerPlD little o super little b AbBLDBKDo sup(b) antibody, BloodTitr

Frequently asked questions

Code details

Code104500-4
SystemLOINC
Display nameDo sup(b) Ab [Titer]
DescriptionD little o super little b Ab
Short nameDo sup(b) Ab Titr SerPl
ComponentD little o super little b Ab
PropertyTitr
TimingPt
System (specimen)Ser/Plas
ScaleSemiQn
ClassBLDBK
Example unitstiter
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.78
Last changed2.78

Consumer names

Do sup(b) antibody, Blood

Part names

D little o super little b AbTitrPtSer/PlasSemiQnDo^b AbTiterPoint in time (spot)Serum or Plasma

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 104500-4 | HealthAssure