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 97997-1: HPA and HLA Ab Nar (S/P/Bld) [Interp]

Name: LOINC Code 97997-1: HPA and HLA Ab Nar (S/P/Bld) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:31.427Z

97997-1 is a LOINC code used to identify HPA and HLA Ab Nar (S/P/Bld) [Interp] 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 HPA & HLA Ab. It is commonly used with the system or sample type Ser/Plas/Bld.

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 HPA & HLA Ab. It is commonly used with the system or sample type Ser/Plas/Bld.

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

What it does not mean

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

Key facts

HPA and HLA Ab [Interpretation] in Serum, Plasma or Blood Narrative
HPA & HLA Ab
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Blood; Cytotoxic-lymphocytic antibody; HLA ANTIGEN; HPA+HLA; HPA+HLA Ab; Human Leukocyte Antigen; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Lymphocyte antibody; Lymphocytotoxic antibody; Narrative; Panel Reactive AB; Panel Reactive antibody; Pl; PlasBld; Plasma; Plsm; Point in time; PRA; Random; Report; SerP; SerPl; SerPlas; SerPlBld; Serum; Serum or plasma; Serum, plasma or whole blood; SR; WB; Whole blood

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

HPA and HLA Ab Nar (S/P/Bld) [Interp]HPA and HLA Ab [Interpretation] in Serum, Plasma or Blood NarrativeHPA+HLA Ab SerPlBld-ImpHPA & HLA AbHLAInterpretation of HPA & HLA antibody test result, BloodImp

Frequently asked questions

Code details

Code97997-1

SystemLOINC

Display nameHPA and HLA Ab Nar (S/P/Bld) [Interp]

DescriptionHPA & HLA Ab

Short nameHPA+HLA Ab SerPlBld-Imp

ComponentHPA & HLA Ab

PropertyImp

TimingPt

System (specimen)Ser/Plas/Bld

ScaleNar

ClassHLA

Example unitsHPA + HLA Ab screening SPA

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.70

Last changed2.70

Consumer names

Interpretation of HPA & HLA antibody test result, Blood

Part names

HPA & HLA AbImpPtSer/Plas/BldNarHPA and HLA AbImpression/interpretation of studyPoint in time (spot)Serum, Plasma or Blood

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.