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LOINC Code 12512-0: Calcium hydrogen phosphate dihydrate crystals LM Ql (Urine sed)

12512-0 is a LOINC code used to identify Calcium hydrogen phosphate dihydrate crystals LM Ql (Urine sed) 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 hydrogen phosphate dihydrate crystals. It is commonly used with the system or sample type Urine sed.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 hydrogen phosphate dihydrate crystals. It is commonly used with the system or sample type Urine sed.

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 hydrogen phosphate dihydrate crystals [Presence] in Urine sediment by Light microscopy
  • Calcium hydrogen phosphate dihydrate crystals
  • Brushite; Brushite crystals; Ca; Ca H2 Phos dihyd; Ca H2 Phos dihyd Cry; Cal; CHPD; Crys; Cryst; Crystal; H2; Hyd; i Phos; Inorganic phosphate; Kidney; LM; Micro; Micros; Microscopic; Nephrology; Ordinal; Phos; Phosphate total; Phosphorous; Phosphorus; Phosphrous; Pi; PO4; Point in time; PR; QL; Qual; Qualitative; Random; Renal; Screen; UA; UR; URINALYSIS; Urine sediment; Urn; UrnS

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 hydrogen phosphate dihydrate crystals LM Ql (Urine sed)Calcium hydrogen phosphate dihydrate crystals [Presence] in Urine sediment by Light microscopyCa H2 Phos dihyd Cry UrnS Ql MicroCalcium hydrogen phosphate dihydrate crystalsUABrushite crystals, Urine sedimentPrThr

Frequently asked questions

Code details

Code12512-0
SystemLOINC
Display nameCalcium hydrogen phosphate dihydrate crystals LM Ql (Urine sed)
DescriptionCalcium hydrogen phosphate dihydrate crystals
Short nameCa H2 Phos dihyd Cry UrnS Ql Micro
ComponentCalcium hydrogen phosphate dihydrate crystals
PropertyPrThr
TimingPt
System (specimen)Urine sed
ScaleOrd
MethodMicroscopy.light
ClassUA
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.73

Consumer names

Brushite crystals, Urine sediment

Part names

Calcium hydrogen phosphate dihydrate crystalsPrThrPtUrine sedOrdMicroscopy.lightPresence or ThresholdPoint in time (spot)Urine sedimentLight 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.