LOINCActiveObservation

LOINC Code 86639-2: Household size [#]

86639-2 is a LOINC code used to identify Household size [#] 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 Household size. It is commonly used with the system or sample type ^Patient.

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 Household size. It is commonly used with the system or sample type ^Patient.

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

  • Household size [#]
  • Household size
  • Self-report of the total number of persons living in the household, including the patient.
  • ADMIN; ADMIN.PATIENT; ADMIN.PT.DEMOG; Cnt; Count; Number; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Household size [#]Household sizeADMIN.PATIENT.DEMOGNumPt^PatientQn

Frequently asked questions

Code details

Code86639-2
SystemLOINC
Display nameHousehold size [#]
DescriptionHousehold size
Short nameHousehold size
ComponentHousehold size
PropertyNum
TimingPt
System (specimen)^Patient
ScaleQn
ClassADMIN.PATIENT.DEMOG
Example units#
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.61
Last changed2.66

Part names

Household sizeNumPt^PatientQnNumber (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 86639-2 | HealthAssure