LOINCActiveOrder

LOINC Code 51991-8: Referral lab test panel

51991-8 is a LOINC code used to identify Referral lab test panel 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 Referral lab test panel. It is commonly used with the system or sample type Referral lab test.

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 Referral lab test panel. It is commonly used with the system or sample type Referral lab test.

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: Order
  • Panel type: Panel

What it does not mean

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

Key facts

  • Referral lab test panel
  • MISC; Pan; PANEL.MISC; Panl; Pnl; Point in time; Random; Ref Lab Test; Ref lab test Pnl

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

Referral lab test panelRef lab test PnlPANEL.MISC-PtReferral lab testPoint in time (spot)

Frequently asked questions

Code details

Code51991-8
SystemLOINC
Display nameReferral lab test panel
Short nameRef lab test Pnl
ComponentReferral lab test panel
Property-
TimingPt
System (specimen)Referral lab test
Scale-
ClassPANEL.MISC
StatusACTIVE
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.73

Consumer names

Referral lab test panel

Part names

Referral lab test panel-PtReferral lab testPoint 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 51991-8 | HealthAssure