LOINCOrder

LOINC Code 109974-6: Histone H2a+H2b Ab (S) [Measurement]

109974-6 is a LOINC code used to identify Histone H2a+H2b Ab (S) [Measurement] 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 Histone H2a+H2b Ab. 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 Histone H2a+H2b Ab. 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: TRIAL
  • Order vs observation: Order

What it does not mean

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

Key facts

Histone H2a+H2b Ab [Measurement] in Serum
Histone H2a+H2b Ab
This term is intended to collate similar measurements for the LOINC SNOMED CT Collaboration in an ontological view. Additionally, it can be used to communicate a laboratory order, either alone or in combination with specimen or other information in the order. It may NOT be used to report back the measured patient value. [https//lo.inc/ce2mb6]
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Drug induced systemic lupus erythematosus; H2a-H2b; Histone DNA complex ab IgG; Lab orders; Msmt; Serum; SR

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

Histone H2a+H2b Ab (S) [Measurement]Histone H2a+H2b Ab [Measurement] in SerumHistone H2a+H2b Ab Msmt SerHistone H2a+H2b AbLABORDERS.ONTOLOGYHistone H2a+H2b antibody, Blood{Measurement}

Frequently asked questions

Code details

Code109974-6
SystemLOINC
Display nameHistone H2a+H2b Ab (S) [Measurement]
DescriptionHistone H2a+H2b Ab
Short nameHistone H2a+H2b Ab Msmt Ser
ComponentHistone H2a+H2b Ab
Property{Measurement}
Timing-
System (specimen)Ser
Scale-
ClassLABORDERS.ONTOLOGY
StatusTRIAL
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.81
Last changed2.81

Consumer names

Histone H2a+H2b antibody, Blood

Part names

Histone H2a+H2b Ab{Measurement}-SerMeasurementSerum

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 109974-6 | HealthAssure