LOINCActiveObservation

LOINC Code 101128-7: Theoretical limit of detection Calc (Specimen) [#]

101128-7 is a LOINC code used to identify Theoretical limit of detection Calc (Specimen) [#] 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 Theoretical limit of detection. It is commonly used with the system or sample type XXX.

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 Theoretical limit of detection. It is commonly used with the system or sample type XXX.

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: Observation
  • Method: Calculated

What it does not mean

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

Key facts

  • Theoretical limit of detection [#] in Specimen by calculation
  • Theoretical limit of detection
  • The theoretical limit of detection for the patient sample, which at one reference laboratory, is calculated as 20 abnormal cell events divided by the actual number of non-aggregate events collected from the sample.
  • Calc; Calculation; Cnt; Count; Misc; Miscellaneous; Number; Other; Point in time; QNT; Quan; Quant; Quantitative; Random; Spec; To be specified in another part of the message; Unspecified

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

Theoretical limit of detection Calc (Specimen) [#]Theoretical limit of detection [#] in Specimen by calculationTheoretical limit of detection Spec CalcTheoretical limit of detectionMISCTheoretical limit of detection, SpecimenNum

Frequently asked questions

Code details

Code101128-7
SystemLOINC
Display nameTheoretical limit of detection Calc (Specimen) [#]
DescriptionTheoretical limit of detection
Short nameTheoretical limit of detection Spec Calc
ComponentTheoretical limit of detection
PropertyNum
TimingPt
System (specimen)XXX
ScaleQn
MethodCalculated
ClassMISC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.74
Last changed2.82

Consumer names

Theoretical limit of detection, Specimen

Part names

Theoretical limit of detectionNumPtXXXQnCalculatedNumber (count)Point in time (spot)

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 101128-7 | HealthAssure