LOINCActiveBoth

LOINC Code 15170-4: Complement total hemolytic C50 IA Qn (Syn fld)

15170-4 is a LOINC code used to identify Complement total hemolytic C50 IA Qn (Syn fld) 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 total hemolytic C50. It is commonly used with the system or sample type Synv fld.

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 total hemolytic C50. It is commonly used with the system or sample type Synv fld.

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
  • Method: IA

What it does not mean

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

Key facts

  • Complement total hemolytic C50 [Units/volume] in Synovial fluid by Immunoassay
  • Complement total hemolytic C50
  • Arbitrary concentration; Comp; Comp C50; Complmt; EIA; ELFA; ELISA; Enzyme immunoassay; HEMATOLOGY/CELL COUNTS; IAA; Joint aspirate; Joint fld; Joint flu; Joint fluid; MEIA; Point in time; QNT; Quan; Quant; Quantitative; Random; SF; SNV; SUDS; Syn; Syn fl; Synov; Synovial fluid; Tot; Total Hem Comp; Totl

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 total hemolytic C50 IA Qn (Syn fld)Complement total hemolytic C50 [Units/volume] in Synovial fluid by ImmunoassayComp C50 Snv IA-aCncComplement total hemolytic C50HEM/BCComplement Total Hemolytic C50, Synovial fluidACnc

Frequently asked questions

Code details

Code15170-4
SystemLOINC
Display nameComplement total hemolytic C50 IA Qn (Syn fld)
DescriptionComplement total hemolytic C50
Short nameComp C50 Snv IA-aCnc
ComponentComplement total hemolytic C50
PropertyACnc
TimingPt
System (specimen)Synv fld
ScaleQn
MethodIA
ClassHEM/BC
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0k
Last changed2.69

Consumer names

Complement Total Hemolytic C50, Synovial fluid

Part names

Complement total hemolytic C50ACncPtSynv fldQnIAArbitrary ConcentrationPoint in time (spot)Synovial fluidImmunoassay

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.

LOINC Code 15170-4 | HealthAssure