LOINCActiveObservation

LOINC Code 52839-8: Total patient population #

52839-8 is a LOINC code used to identify Total patient population # 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 Total patient population. It is commonly used with the system or sample type {Type of nursing unit or service}.

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 Total patient population. It is commonly used with the system or sample type {Type of nursing unit or service}.

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

  • Total patient population #
  • Total patient population
  • A count of the patient population during the reporting period
  • Cnt; Count; Number; Nursing Management Minimum Data Set; Point in time; QNT; Quan; Quant; Quantitative; Random; Survey; SURVEY.NMMDS; Tot; Totl

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

Total patient population #Total patient populationSURVEY.NMMDSNumPt{Type of nursing unit or service}Qn

Frequently asked questions

Code details

Code52839-8
SystemLOINC
Display nameTotal patient population #
DescriptionTotal patient population
ComponentTotal patient population
PropertyNum
TimingPt
System (specimen){Type of nursing unit or service}
ScaleQn
ClassSURVEY.NMMDS
Example units#
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.70

Part names

Total patient populationNumPt{Type of nursing unit or service}QnNumber (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.