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 13087-2: Complement alternate pathway AH50 Qn

Name: LOINC Code 13087-2: Complement alternate pathway AH50 Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:23.608Z

13087-2 is a LOINC code used to identify Complement alternate pathway AH50 Qn 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 Complement alternate pathway AH50. It is commonly used with the system or sample type Ser/Plas.

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 Complement alternate pathway AH50. It is commonly used with the system or sample type Ser/Plas.

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

Complement alternate pathway AH50 [Units/volume] in Serum or Plasma
Complement alternate pathway AH50
AP; APH50; Arbitrary concentration; Comp; Complement alternative pathway; Complement total alternate pathway AH50; Complmt; HEMATOLOGY/CELL COUNTS; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; 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

Complement alternate pathway AH50 QnComplement alternate pathway AH50 [Units/volume] in Serum or PlasmaAH50 SerPl-aCncComplement alternate pathway AH50HEM/BCComplement Alternate Pathway AH50, BloodACnc

Frequently asked questions

Code details

Code13087-2

SystemLOINC

Display nameComplement alternate pathway AH50 Qn

DescriptionComplement alternate pathway AH50

Short nameAH50 SerPl-aCnc

ComponentComplement alternate pathway AH50

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassHEM/BC

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.73

Consumer names

Complement Alternate Pathway AH50, Blood

Part names

Complement alternate pathway AH50ACncPtSer/PlasQnArbitrary ConcentrationPoint in time (spot)Serum or Plasma

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.