LOINCOrder

LOINC Code 55255-4: Pyridinoline panel (U)

55255-4 is a LOINC code used to identify Pyridinoline panel (U) 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 Pyridinoline panel. It is commonly used with the system or sample type Urine.

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 Pyridinoline panel. It is commonly used with the system or sample type Urine.

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: DISCOURAGED
  • 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

  • Pyridinoline panel - Urine
  • Pyridinoline panel
  • Chemistry; Pan; PANEL.CHEMISTRY; Panl; Pnl; Point in time; PYD; PYD Pnl; Pyr; Pyridinium collagen crosslinks; Random; UA; UR; Urn

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

Pyridinoline panel (U)Pyridinoline panel - UrinePYD Pnl UrPyridinoline panelPANEL.CHEMPyridinoline panel, Urine-

Frequently asked questions

Code details

Code55255-4
SystemLOINC
Display namePyridinoline panel (U)
DescriptionPyridinoline panel
Short namePYD Pnl Ur
ComponentPyridinoline panel
Property-
TimingPt
System (specimen)Urine
Scale-
ClassPANEL.CHEM
StatusDISCOURAGED
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.27
Last changed2.70

Consumer names

Pyridinoline panel, Urine

Part names

Pyridinoline panel-PtUrinePoint 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 55255-4 | HealthAssure