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 69956-1: Human upstream binding factor IgG IA Ql (S)

Name: LOINC Code 69956-1: Human upstream binding factor IgG IA Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:48.867Z

69956-1 is a LOINC code used to identify Human upstream binding factor IgG IA Ql (S) 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 Human upstream binding factor Ab.IgG. It is commonly used with the system or sample type Ser.

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 Human upstream binding factor Ab.IgG. It is commonly used with the system or sample type Ser.

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: IA

What it does not mean

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

Key facts

Human upstream binding factor IgG Ab [Presence] in Serum by Immunoassay

Human upstream binding factor Ab.IgG

This entity has two names"nucleolar organizing region (NOR) 90" versus "human upstream binding factor (hUBF)". Both names are right, and the literature looking for the antibody in autoimmune patients almost uniformly includes both names and the historical context. NOR90 stuck because it was called that by the author of the original finding in autoimmune patients (Rodriguez-Sanchez, et al, 1987), but a few years later (1994), the antigen was found to be identical to already characterized hUBF. So we are stuck with the 2 names. hUBF is more technically specific, and at least one recent review calls it "anti-hUBF, formerly anti-NOR 90" (Journal of Dermatology 2010; 37: 42-53). So we will use that as its primary name.

ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Bind; EIA; ELFA; ELISA; Enzyme immunoassay; Fac; Fact; hUBF; Human upstream binding transcription factor; IAA; Immune globulin G; Immunoglobulin G; MEIA; NOR 90; NOR90; NOR-90; Nucleolus organizer regions; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; Serum; SR; SUDS; UBTF

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

Human upstream binding factor IgG IA Ql (S)Human upstream binding factor IgG Ab [Presence] in Serum by ImmunoassayhUBF IgG Ser Ql IAHuman upstream binding factor Ab.IgGSEROHuman upstream binding factor IgG antibody, BloodPrThr

Frequently asked questions

Code details

Code69956-1

SystemLOINC

Display nameHuman upstream binding factor IgG IA Ql (S)

DescriptionHuman upstream binding factor Ab.IgG

Short namehUBF IgG Ser Ql IA

ComponentHuman upstream binding factor Ab.IgG

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodIA

ClassSERO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.40

Last changed2.68

Consumer names

Human upstream binding factor IgG antibody, Blood

Part names

Human upstream binding factor Ab.IgGPrThrPtSerOrdIAHuman upstream binding factor IgGPresence or ThresholdPoint in time (spot)SerumImmunoassay

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.