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.

LOINCActiveObservation

LOINC Code 55178-8: Calcium phosphate crystals LM Ql (Specimen)

Name: LOINC Code 55178-8: Calcium phosphate crystals LM Ql (Specimen)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:37.143Z

55178-8 is a LOINC code used to identify Calcium phosphate crystals LM Ql (Specimen) 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 Calcium phosphate crystals. It is commonly used with the system or sample type XXX.

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 Calcium phosphate crystals. It is commonly used with the system or sample type XXX.

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: Observation
Method: Microscopy.light

What it does not mean

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

Key facts

Calcium phosphate crystals [Presence] in Specimen by Light microscopy
Calcium phosphate crystals
Ca; Ca Phos; Ca Phos Cry; Cal; CAP; Crys; Cryst; Crystal; i Phos; Inorganic phosphate; LM; Micro; Micros; Microscopic; Misc; Miscellaneous; Ordinal; Other; Phos; Phosphate total; Phosphorous; Phosphorus; Phosphrous; Pi; PO4; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spec; To be specified in another part of the message; Unspecified; URINALYSIS

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

Calcium phosphate crystals LM Ql (Specimen)Calcium phosphate crystals [Presence] in Specimen by Light microscopyCa Phos Cry Spec Ql MicroCalcium phosphate crystalsUACalcium phosphate crystals, SpecimenPrThr

Frequently asked questions

Code details

Code55178-8

SystemLOINC

Display nameCalcium phosphate crystals LM Ql (Specimen)

DescriptionCalcium phosphate crystals

Short nameCa Phos Cry Spec Ql Micro

ComponentCalcium phosphate crystals

PropertyPrThr

TimingPt

System (specimen)XXX

ScaleOrd

MethodMicroscopy.light

ClassUA

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.27

Last changed2.69

Consumer names

Calcium phosphate crystals, Specimen

Part names

Calcium phosphate crystalsPrThrPtXXXOrdMicroscopy.lightPresence or ThresholdPoint in time (spot)Light microscopy

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.