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.

LOINCActiveOrder

LOINC Code 57777-5: Myeloperoxidase Ab and Proteinase 3 panel (S)

Name: LOINC Code 57777-5: Myeloperoxidase Ab and Proteinase 3 panel (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.757Z

57777-5 is a LOINC code used to identify Myeloperoxidase Ab and Proteinase 3 panel (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 Myeloperoxidase Ab & Proteinase 3 panel. 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 Myeloperoxidase Ab & Proteinase 3 panel. 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: Order
Panel type: Panel

What it does not mean

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

Key facts

Myeloperoxidase Ab and Proteinase 3 panel - Serum
Myeloperoxidase Ab & Proteinase 3 panel
III; MPO; MPO - ANCA; MPO Ab + PR3 pnl; Myeloperoxidase ANCA; Pan; p-ANCA; PANEL.SEROLOGY; Panl; Pnl; Point in time; PR3; PR-3; PR3-ANCA; Proteinase3; PRTN3; QNT; Quan; Quant; Quantitative; Random; Serine protease 3; Serology; Serum; SR; Vasculitis

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

Myeloperoxidase Ab and Proteinase 3 panel (S)Myeloperoxidase Ab and Proteinase 3 panel - SerumMPO Ab + PR3 pnl SerMyeloperoxidase Ab & Proteinase 3 panelPANEL.SEROMyeloperoxidase Ab and Proteinase 3 panel, Blood-

Frequently asked questions

Code details

Code57777-5

SystemLOINC

Display nameMyeloperoxidase Ab and Proteinase 3 panel (S)

DescriptionMyeloperoxidase Ab & Proteinase 3 panel

Short nameMPO Ab + PR3 pnl Ser

ComponentMyeloperoxidase Ab & Proteinase 3 panel

Property-

TimingPt

System (specimen)Ser

ScaleQn

ClassPANEL.SERO

StatusACTIVE

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.73

Consumer names

Myeloperoxidase Ab and Proteinase 3 panel, Blood

Part names

Myeloperoxidase Ab & Proteinase 3 panel-PtSerQnMyeloperoxidase Ab and Proteinase 3 panelPoint 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.