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.

LOINC

LOINC Code 63849-4: Number of days vacuum has been used since changing bag or emptying the collection chamber [PhenX]

Name: LOINC Code 63849-4: Number of days vacuum has been used since changing bag or emptying the collection chamber [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:43.946Z

63849-4 is a LOINC code used to identify Number of days vacuum has been used since changing bag or emptying the collection chamber [PhenX] 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 D vacuum has been used since changing bag or emptying the collection chamber. 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 D vacuum has been used since changing bag or emptying the collection chamber. 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: TRIAL
Method: PhenX

What it does not mean

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

Key facts

Number of days vacuum has been used since changing bag or emptying the collection chamber [PhenX]
Number of D vacuum has been used since changing bag or emptying the collection chamber
Coll; Collect; Collected; Dextro; Empty; No; Num; Number Ds vacuum used; 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

Number of days vacuum has been used since changing bag or emptying the collection chamber [PhenX]Number Ds vacuum used PhenXNumber of D vacuum has been used since changing bag or emptying the collection chamberPHENXTimePt^Patient

Frequently asked questions

Code details

Code63849-4

SystemLOINC

Display nameNumber of days vacuum has been used since changing bag or emptying the collection chamber [PhenX]

DescriptionNumber of D vacuum has been used since changing bag or emptying the collection chamber

Short nameNumber Ds vacuum used PhenX

ComponentNumber of D vacuum has been used since changing bag or emptying the collection chamber

PropertyTime

TimingPt

System (specimen)^Patient

ScaleQn

MethodPhenX

ClassPHENX

Example unitsdays

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

Number of D vacuum has been used since changing bag or emptying the collection chamberTimePt^PatientQnPhenXNumber of days vacuum has been used since changing bag or emptying the collection chamberTime (e.g. seconds)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.