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LOINC Code 16266-9: Calcium hydrogen phosphate crystals Infrared spectroscopy Ql (Stone)

16266-9 is a LOINC code used to identify Calcium hydrogen phosphate crystals Infrared spectroscopy Ql (Stone) 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 crystals. It is commonly used with the system or sample type Calculus.

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 crystals. It is commonly used with the system or sample type Calculus.

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: Infrared spectroscopy

What it does not mean

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

Key facts

  • Calcium hydrogen phosphate crystals [Presence] in Stone by Infrared spectroscopy
  • Calcium hydrogen phosphate crystals
  • Ca; CaHPO4 Cry; CaHPO4OH2O; Cal; Calc; Calculi; Chemistry; Crys; Cryst; Crystal; Gastro; Gastroenterology; GI; H2; Hyd; i Phos; Infared spectoscopy; Inorganic phosphate; IR; Kidney; Nephrology; Ordinal; Phos; Phosphate total; Phosphorous; Phosphorus; Phosphrous; Pi; PO4; Point in time; PR; QL; Qual; Qualitative; Random; Renal; Screen; Stn; Stone; Stones

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 crystals Infrared spectroscopy Ql (Stone)Calcium hydrogen phosphate crystals [Presence] in Stone by Infrared spectroscopyCaHPO4 Cry Stone Ql IRCalcium hydrogen phosphate crystalsCHEMCalcium hydrogen phosphate crystals, StonePrThr

Frequently asked questions

Code details

Code16266-9
SystemLOINC
Display nameCalcium hydrogen phosphate crystals Infrared spectroscopy Ql (Stone)
DescriptionCalcium hydrogen phosphate crystals
Short nameCaHPO4 Cry Stone Ql IR
ComponentCalcium hydrogen phosphate crystals
PropertyPrThr
TimingPt
System (specimen)Calculus
ScaleOrd
MethodInfrared spectroscopy
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.73

Consumer names

Calcium hydrogen phosphate crystals, Stone

Part names

Calcium hydrogen phosphate crystalsPrThrPtCalculusOrdInfrared spectroscopyPresence or ThresholdPoint in time (spot)Calculus (stone)

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.