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.

LOINCActiveObservation

LOINC Code 46996-5: HLA Ab positive cells (S) [#]

Name: LOINC Code 46996-5: HLA Ab positive cells (S) [#]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:31.754Z

46996-5 is a LOINC code used to identify HLA Ab positive cells (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 HLA Ab positive cells. 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 HLA Ab positive cells. 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: Observation

What it does not mean

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

Key facts

HLA Ab positive cells [#] in Serum
HLA Ab positive cells
number of positive antibody reactions
Cell; Cellularity; Cnt; Count; Cytotoxic-lymphocytic antibody; HLA ANTIGEN; Human Leukocyte Antigen; Lymphocyte antibody; Lymphocytotoxic antibody; Number; Panel Reactive AB; Panel Reactive antibody; Point in time; Pos; PRA; QNT; Quan; Quant; Quantitative; Random; 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

HLA Ab positive cells (S) [#]HLA Ab positive cells [#] in SerumNum HLA Ab positive cellsHLA Ab positive cellsHLAHLA Ab positive cells, BloodNum

Frequently asked questions

Code details

Code46996-5

SystemLOINC

Display nameHLA Ab positive cells (S) [#]

DescriptionHLA Ab positive cells

Short nameNum HLA Ab positive cells

ComponentHLA Ab positive cells

PropertyNum

TimingPt

System (specimen)Ser

ScaleQn

ClassHLA

Example units#

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.19

Last changed2.73

Consumer names

HLA Ab positive cells, Blood

Part names

HLA Ab positive cellsNumPtSerQnNumber (count)Point in time (spot)Serum

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.