LOINC

LOINC Code 65644-7: BTPS factor [Ratio] [PhenX]

65644-7 is a LOINC code used to identify BTPS factor [Ratio] [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 BTPS factor. 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 BTPS factor. 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

  • BTPS factor [Ratio] [PhenX]
  • BTPS factor
  • Body temperature and ambient pressure saturated with water vapor
  • Body Temperature Pressure Saturation; Fac; Fact; Point in time; QNT; Quan; Quant; Quantitative; Random; Ratios; Rto

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

BTPS factor [Ratio] [PhenX]BTPS factor PhenXBTPS factorPHENXRatioPt^Patient

Frequently asked questions

Code details

Code65644-7
SystemLOINC
Display nameBTPS factor [Ratio] [PhenX]
DescriptionBTPS factor
Short nameBTPS factor PhenX
ComponentBTPS factor
PropertyRatio
TimingPt
System (specimen)^Patient
ScaleQn
MethodPhenX
ClassPHENX
Example unitsratio
StatusTRIAL

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.65

Part names

BTPS factorRatioPt^PatientQnPhenXPoint 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 65644-7 | HealthAssure