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LOINC Code 109990-2: Inositol 1,4,5-trisphosphate receptor type 1 IgG (S) [Measurement]

109990-2 is a LOINC code used to identify Inositol 1,4,5-trisphosphate receptor type 1 IgG (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 Inositol 1,4,5-trisphosphate receptor type 1 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 Inositol 1,4,5-trisphosphate receptor type 1 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: TRIAL
  • Order vs observation: Order

What it does not mean

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

Key facts

Inositol 1,4,5-trisphosphate receptor type 1 IgG Ab [Measurement] in Serum
Inositol 1,4,5-trisphosphate receptor type 1 Ab.IgG
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; Cyclohexane-1,2,3,4,5,6-hexol; i; Immune globulin G; Immunoglobulin G; InsP3R1; IP3 receptor isoform 1; IP3R 1; IP3R 1 Ab; IP3R 1 IgG; ITPR; ITPR1; Lab orders; Msmt; Rec; Recept; Receptors; Recp; Recptr; Serum; SR; Type 1 inositol 1,4,5-trisphosphate receptor; Type 1 InsP3 receptor

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

Inositol 1,4,5-trisphosphate receptor type 1 IgG (S) [Measurement]Inositol 1,4,5-trisphosphate receptor type 1 IgG Ab [Measurement] in SerumIP3R 1 IgG Msmt SerInositol 1,4,5-trisphosphate receptor type 1 Ab.IgGLABORDERS.ONTOLOGYInositol 1,4,5-trisphosphate receptor type 1 IgG antibody, Blood{Measurement}

Frequently asked questions

Code details

Code109990-2
SystemLOINC
Display nameInositol 1,4,5-trisphosphate receptor type 1 IgG (S) [Measurement]
DescriptionInositol 1,4,5-trisphosphate receptor type 1 Ab.IgG
Short nameIP3R 1 IgG Msmt Ser
ComponentInositol 1,4,5-trisphosphate receptor type 1 Ab.IgG
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

Inositol 1,4,5-trisphosphate receptor type 1 IgG antibody, Blood

Part names

Inositol 1,4,5-trisphosphate receptor type 1 Ab.IgG{Measurement}-SerInositol 1,4,5-trisphosphate receptor type 1 IgGMeasurementSerum

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.