What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 99661-1: Number of family members or close friends that have been infected with condition of interest

Name: LOINC Code 99661-1: Number of family members or close friends that have been infected with condition of interest
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.065Z

99661-1 is a LOINC code used to identify Number of family members or close friends that have been infected with condition of interest 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 Number of family members or close friends that have been infected with condition of interest. 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 Number of family members or close friends that have been infected with condition of interest. 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

Number of family members or close friends that have been infected with condition of interest
Cnt; Count; Disease; Disorder; No; Num; Number; Point in time; QNT; Quan; Quant; Quantitative; Random; Survey; SURVEY.GNHLTH; Virus

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

Number of family members or close friends that have been infected with condition of interestSURVEY.GNHLTHNumPt^PatientQnNumber (count)

Frequently asked questions

Code details

Code99661-1

SystemLOINC

Display nameNumber of family members or close friends that have been infected with condition of interest

ComponentNumber of family members or close friends that have been infected with condition of interest

PropertyNum

TimingPt

System (specimen)^Patient

ScaleQn

ClassSURVEY.GNHLTH

Example units#

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.74

Part names

Number of family members or close friends that have been infected with condition of interestNumPt^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.