LOINCActiveObservation

LOINC Code 34990-2: Unidentified cells (Periton fld) [#/Vol]

34990-2 is a LOINC code used to identify Unidentified cells (Periton fld) [#/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 Unidentified cells. It is commonly used with the system or sample type Periton 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 Unidentified cells. It is commonly used with the system or sample type Periton 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: Observation

What it does not mean

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

Key facts

  • Unidentified cells [#/volume] in Peritoneal fluid
  • Unidentified cells
  • #; ABS; absolute; absolutes; Ascites; Ascitic fluid; Ascitis; Cell; Cellularity; Cnt; Count; Count/volume; CT; HEMATOLOGY/CELL COUNTS; NOS AB; Number concentration; Number Concentration (count/vol); Peritoneal fluid; Point in time; Prt; QNT; Quan; Quant; Quantitative; Random; Unident Cells

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

Unidentified cells (Periton fld) [#/Vol]Unidentified cells [#/volume] in Peritoneal fluidUnident Cells # PrtUnidentified cellsHEM/BCPeritoneal fluid Unidentified cells testNCnc

Frequently asked questions

Code details

Code34990-2
SystemLOINC
Display nameUnidentified cells (Periton fld) [#/Vol]
DescriptionUnidentified cells
Short nameUnident Cells # Prt
ComponentUnidentified cells
PropertyNCnc
TimingPt
System (specimen)Periton fld
ScaleQn
ClassHEM/BC
Example units10*3/uL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.11
Last changed2.44

Consumer names

Peritoneal fluid Unidentified cells test

Part names

Unidentified cellsNCncPtPeriton fldQnNumber ConcentrationPoint in time (spot)Peritoneal fluid

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 34990-2 | HealthAssure