LOINCActiveBoth

LOINC Code 11021-3: Microscopic observation Terminal deoxynucleotidyl transferase stain Nom (Bld/BM)

11021-3 is a LOINC code used to identify Microscopic observation Terminal deoxynucleotidyl transferase stain Nom (Bld/BM) 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 Observation. It is commonly used with the system or sample type Bld/Bone mar.

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 Observation. It is commonly used with the system or sample type Bld/Bone mar.

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: Terminal deoxynucleotidyl transferase stain

What it does not mean

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

Key facts

  • Microscopic observation [Identifier] in Blood or Marrow by Terminal deoxynucleotidyl transferase stain
  • Observation
  • Bld/Mar; Blood; BM; BON; Bone marrow; Identity or presence; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Nominal; Pathology; Point in time; Random; St; Stains; Stn; TdT stain; TdT Stn; WB; Whole blood; Whole blood or Bone marrow

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

Microscopic observation Terminal deoxynucleotidyl transferase stain Nom (Bld/BM)Microscopic observation [Identifier] in Blood or Marrow by Terminal deoxynucleotidyl transferase stainTdT Stn Bld/MarObservationPATHMicroscopic observation, Blood Or Bone marrowPrid

Frequently asked questions

Code details

Code11021-3
SystemLOINC
Display nameMicroscopic observation Terminal deoxynucleotidyl transferase stain Nom (Bld/BM)
DescriptionObservation
Short nameTdT Stn Bld/Mar
ComponentObservation
PropertyPrid
TimingPt
System (specimen)Bld/Bone mar
ScaleNom
MethodTerminal deoxynucleotidyl transferase stain
ClassPATH
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.78

Consumer names

Microscopic observation, Blood Or Bone marrow

Part names

ObservationPridPtBld/Bone marNomTerminal deoxynucleotidyl transferase stainPresence or IdentityPoint in time (spot)Blood or Marrow

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 11021-3 | HealthAssure