HealthAssure
HealthAssureGood Life
LOINCActiveBoth

LOINC Code 21536-8: Acid sphingomyelinase (Bld) [Catalytic activity/Vol]

21536-8 is a LOINC code used to identify Acid sphingomyelinase (Bld) [Catalytic activity/Vol] 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 Acid sphingomyelinase. It is commonly used with the system or sample type Bld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Acid sphingomyelinase. It is commonly used with the system or sample type 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

  • Acid sphingomyelinase [Enzymatic activity/volume] in Blood
  • Acid sphingomyelinase
  • Acd; Acids; Blood; Catalytic Concentration; Chemistry; Niemann-Pick A and B variants; Niemann-Pick Disease; Nieman-Pick A and B variants; Point in time; QNT; Quan; Quant; Quantitative; Random; SMase; Sphingomyelin phosphodiesterase; Sphingomyelinase; 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

Acid sphingomyelinase (Bld) [Catalytic activity/Vol]Acid sphingomyelinase [Enzymatic activity/volume] in BloodAcid sphingomyelinase Bld-cCncAcid sphingomyelinaseCHEMAcid sphingomyelinase, BloodCCnc

Frequently asked questions

Code details

Code21536-8
SystemLOINC
Display nameAcid sphingomyelinase (Bld) [Catalytic activity/Vol]
DescriptionAcid sphingomyelinase
Short nameAcid sphingomyelinase Bld-cCnc
ComponentAcid sphingomyelinase
PropertyCCnc
TimingPt
System (specimen)Bld
ScaleQn
ClassCHEM
Example unitsumol/L/h
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.42

Consumer names

Acid sphingomyelinase, Blood

Part names

Acid sphingomyelinaseCCncPtBldQnCatalytic ConcentrationPoint in time (spot)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.