LOINC

LOINC Code 64391-6: Deprecated Phenx measure - systemic lupus erythematosus

64391-6 is a LOINC code used to identify Deprecated Phenx measure - systemic lupus erythematosus 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 PhenX measure - systemic lupus erythematosus. 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 PhenX measure - systemic lupus erythematosus. 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: DEPRECATED
  • Method: PhenX

What it does not mean

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

Key facts

  • Deprecated Phenx measure - systemic lupus erythematosus
  • PhenX measure - systemic lupus erythematosus
  • This measure is a clinical assessment of individuals with systemic lupus erythematosus (SLE, or lupus) to determine the level of organ damage due to the disease. Systemic lupus erythematosus (SLE, or lupus) is a chronic inflammatory autoimmune disease that can affect the skin, joints, lungs, kidneys, nervous system, and other body organs.
  • LE; Measure lupus SLE; Pan; Panel; PANEL.PHENX; Panl; Pnl; Point in time; 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

Deprecated Phenx measure - systemic lupus erythematosusPhenX measure - systemic lupus erythematosusPANEL.PHENX-Pt^PatientPhenX

Frequently asked questions

Code details

Code64391-6
SystemLOINC
Display nameDeprecated Phenx measure - systemic lupus erythematosus
DescriptionPhenX measure - systemic lupus erythematosus
ComponentPhenX measure - systemic lupus erythematosus
Property-
TimingPt
System (specimen)^Patient
Scale-
MethodPhenX
ClassPANEL.PHENX
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.46

Part names

Phenx measure - systemic lupus erythematosus-Pt^PatientPhenXPoint 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.