LOINCActiveObservation

LOINC Code 51401-8: CD81 cells/Cells (Tiss)

51401-8 is a LOINC code used to identify CD81 cells/Cells (Tiss) 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 Cells.CD81/Cells. It is commonly used with the system or sample type Tiss.

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 Cells.CD81/Cells. It is commonly used with the system or sample type Tiss.

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

What it does not mean

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

Key facts

  • CD81 cells/cells in Tissue
  • Cells.CD81/Cells
  • CD81 Cells; Cell; CELL MARKERS; Cellularity; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; TAPA-1; Tissue; Tissue, 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

CD81 cells/Cells (Tiss)CD81 cells/cells in TissueCD81 Cells NFr TissCells.CD81/CellsCELLMARKCD81 cells/cells, TissueNFr

Frequently asked questions

Code details

Code51401-8
SystemLOINC
Display nameCD81 cells/Cells (Tiss)
DescriptionCells.CD81/Cells
Short nameCD81 Cells NFr Tiss
ComponentCells.CD81/Cells
PropertyNFr
TimingPt
System (specimen)Tiss
ScaleQn
ClassCELLMARK
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.22
Last changed2.79

Consumer names

CD81 cells/cells, Tissue

Part names

Cells.CD81/CellsNFrPtTissQnNumber FractionPoint in time (spot)Tissue and Smears

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 51401-8 | HealthAssure